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4th Class Canada (Part A) > Test Question Answers > Flashcards

Test Question Answers Flashcards

1
Q

Design deficiencies in a plant can be detected:

by conducting regular safety audits

if plant operators know their facility well

by having a second engineering firm review the design

during annual boiler inspections

A

by conducting regular safety audits

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2
Q

Types of furnaces surround by brickwork?

A

Externally fired

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3
Q

when chromium is added to steel it does what?

A

increases hardness and corrosion resistance making stainless steel (12%)

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4
Q

NDE

A

Non-destructive examination for welding parts

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5
Q

Steam traps may also remove out of the steam lines?

A

Air

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6
Q

Boiler parts exposed to fire or extreme heat must be covered by?

A

Water/watertubes

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7
Q

SOPs should be:

Printed in large numbers

Reviewed at regular intervals

Destroyed and replaced monthly

Attached to each revised copy.

A

Reviewed at regular intervals

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8
Q

(4-082-4.3) Because of environmental concerns, it is no longer permissible to add ____________ to transformer oil.

Anti-foaming substances

Polyhlorinated biphenyls

Freon

Organic compounds

A

Polyhlorinated biphenyls

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9
Q

Atmospheric burners are used for:

small heating and power boilers under 500 kW

Ring type burners

Coal firing

Preheating the combustion air

A

small heating and power boilers under 500 kW

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10
Q

A process that causes fires to endure and renew themselves is:

Temperature

A reducing agent

An oxidizing agent

Molecular activity due to high temperature

A

Molecular activity due to high temperature

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11
Q

When the temperature of an object is raised, its increase in surface area is proportional to its:

Initial length and final temperature.

Initial area and temperature rise.

Volume and initial temperature.

Initial length and temperature rise.

Shape.

A

Initial area and temperature rise.

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12
Q

The First Law of Thermodynamics states that heat and work

Cannot co-exist

Are mutually convertible

Are unrelated

Are identical

Produce friction

A

Are mutually convertible

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13
Q

The basic food source for all organisms is:

fungi

plankton

microorganisms

plants

A

plants

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14
Q

What efficiency can be attained by fabric filters be in a plant?

75% efficient

87% efficient

95% efficient

+99% efficient

A

+99% efficient

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15
Q

An extensive physical property is one that is:

Dependent on the amount of matter

Independent of the amount of matter

Dependent on the volume

Dependent on the temperature of the object

The same for all known matter

A

Dependent on the amount of matter

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16
Q

A thermostatic steam trap is controlled by the:

Difference in velocity between condensate and steam

air pressure built up on top of disk

Temperature difference between condensate and steam

Bucket, which flips when filled with condensate

A

Temperature difference between condensate and steam

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17
Q

One of the most important features of the first lines drawn in a sketch is that they:

Are to precise scale

Are bold

Must all show the object outline

Show the main proportion of the sketch

A

Show the main proportion of the sketch

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18
Q

If a fuel-air mixture is below the lower explosive limit, the mixture:

Is said to be lean

Is explosive

Is too rich

Must have a source of ignition

A

Is said to be lean

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19
Q

if an area contains hazardous concentrations of flammable gases or vapours under normal operating conditions, electrical equipment must be designed for use in the area. This is designated as:

Class 1

Class 2

Class 3

Class 4

A

Class 1

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20
Q

An example of a chemical property is the:

Density of copper

Temperature of boiler water

Thermal conductivity of steel

Heating value of propane

Hardness of aluminum

A

Heating value of propane

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21
Q

Atoms that have greater than 3 electrons in the outer shell are:

Positively charged

Good conductors

Neutrally charged

Poor conductors

A

Poor conductors

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22
Q

A frequent cause of serious accidents with valves is __________________.

Improperly sized valves leading to flow problems

lack of maintenance

inadequate operational training leading to abuse

unsuitable materials for the operating pressures and temperatures

A
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23
Q

lear definitions for terms and equipment relating to refrigeration and air conditioning equipment are defined in the _____.

CSA-B51

CSA-B52

ASME Section I

ASME Section VII

A

B-52

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24
Q

Which of the following is NOT a type of oil burner?

Atmospheric burners

Steam atomizing burners

Mechanical or pressure atomizing burners

Centrifugal or rotary cup burners

A

Atmospheric burners

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25
Q

What is a nozzle used for on a pressure vessel shell?

it is used to attach fittings to the vessel

It is used to connect feed water piping to the vessel

It is used to attach gauges to the vessel

It is used to attach safety valves to the vessel

A

it is used to attach fittings to the vessel

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26
Q

(4-057-3.8) When a modulating mechanical atomization system is used with an oil burner:

Air pressure at the burner should be 70 kPa

Dry saturated steam should be used

Very high pump pressure is required for correct atomization

The fuel must be preheated to 90 degrees C

A

The fuel must be preheated to 90 degrees C

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27
Q

The balanced equation for complete combustion of sulfur is S + O2 = _________:

SO2 + heat

2SO2 + heat

SO2

SO2 + S

A

SO2 + heat

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28
Q

Reclaiming a work site can be very expensive. What is one way of reducing this cost?

Incentives can be in place for workers.

By using environmentally friendly materials during construction and operation.

Conducting plant operations in an environmentally friendly way from the beginning.

Emergency Response Plans must be followed while operations are being conducted.

A

Conducting plant operations in an environmentally friendly way from the beginning.

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29
Q

A tube expander is used to:

Break loose scale inside the tube

Break loose scale outside the tube

Expand and flare the tube

Bead the tube

A

Bead the tube

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30
Q

A bellows corrugated expansion joint is suitable for pressures up to approximately _______ kPa:

500

1000

2000

Unlimited

A

2000

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31
Q

When a float is used for measuring level, and installation within a vessel is impractical, the float is installed in a

Float manometer

Float cage

Differential head meter

Diaphragm level indicator

A

Float cage

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32
Q

The term “particulate” is often applied to what?

bottom ash which is flushed out of the bottom of the furnace

cooling tower sludge which is recycled

fly ash which enters the atmosphere

the waste from a Flue Gas De-sulphurization process

A

fly ash which enters the atmosphere

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33
Q

The property that determines whether a material can be easily magnetized is called:

Conductivity

Fluctuation

Magnetism

Permeability

A

Permeability

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34
Q

The electrical power necessary for arc welding may be supplied by:

Solar cells

Capacitors

Batteries

Transformers

A

Transformers

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35
Q

An orifice plate with a round opening that is centred in the middle of the plate is called a:

Concentric orifice

Eccentric orifice

Concentric flange

Centralized flow

A

Concentric orifice

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36
Q

A PLC needs to be able to check itself for safe operation. This occurs during the:

input scan

housekeeping scan

maintenance scan

program scan

A

housekeeping scan

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37
Q

When using the Left Hand Rule for Motors, the index finger represents:

Magnetic flux direction, for generators

Conductor motion direction, for motors

Flux direction, for motors

Direction of current flow, for motors.

A

Conductor motion direction, for motors

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38
Q

An area in which easily ignited material fibers are handled or manufactured has an Electrical Designation of:

Class 1

Class 2

Class 3

Class 4

A

Class 3

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39
Q

In the First Law of Thermodynamics, heat supplied = increase in internal energy + ____________:

Energy supplied.

Energy absorbed.

Work input.

Work done.

Power output.

A

Work done.

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40
Q

Boiler handholes are openings that are use to:

Enter and inspect the boiler furnace

Inspect the boiler uptake

Inspect the boiler shell or drum

Inspect the windbox

A

Inspect the boiler shell or drum

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41
Q

One of the national legislative items which each jurisdiction in Canada has adopted as part of their applicable Act and/or Regulations is the:

ASME Codes

ANSI Codes

CSA B52

NFPA Codes

NAFTA Codes

A

CSA B52

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42
Q

Which of the following extinguishers would ordinarily be used to combat a Class “C” fire:

Carbon dioxide and Foam

Carbon dioxide and Dry chemical

Foam and Dry chemical

Foam and Water

A

Carbon dioxide and Dry chemical

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43
Q

On older boilers, the masonry work that surrounded the furnace was termed:

The boiler firebox

Masonry

The boiler setting

The boiler casing

A

The boiler setting

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44
Q

A diaphragm draft gauge on a furnace indicates the draft in:

mm of water column

kPa

MPa

psi

A

mm of water column

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45
Q

What is impact strength also known as?

yield strength

ultimate strength

toughness

brittleness

A

toughness

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46
Q

Up to and including DN 300 mm pipe, the “nominal pipe size” refers to a pipe’s

nominal circumference

nominal inside diameter

nominal outside diameter

nominal wall thickness

A

nominal inside diameter

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47
Q

With regards to greenhouse gases, which of the following is the most powerful?

NOx

H2O

Flourinated gases

Methane

A

Flourinated gases

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48
Q

Condensation losses in steam can be avoided by:

Heating the steam to saturation temperature

Using wet steam

Using only high pressure steam

Installing steam separators

Using superheated steam

A

Using superheated steam

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49
Q

What is a benefit of a double-welded joint?

it is quicker to set up

it doesn’t require tack welds

it requires less skill

it reduces residual stress

A

it reduces residual stress

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50
Q

Pipe insulation, when installed on pipes that carry cold fluids, prevents

the requirements for heat tracing

Water hammer at elbows

Expansion and contraction

Sweating and corrosion

A

Sweating and corrosion

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51
Q

Medium carbon steel becomes difficult to weld when its carbon content exceeds:

10%

  1. 5%
  2. 35%
  3. 25%
A

0.35%

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52
Q

For the determination of what mechanical property is a Brinnell test conducted?

toughness

ductility

strength

hardness

A

hardness

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53
Q

Besides a flashlight, what else is used during a visual inspection of a weld?

microscopes

fluorescent lights

magnifying glasses

chisels

A

magnifying glasses

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54
Q

The ignition temperature of a fuel/air mixture is the:

Lowest temperature at which a mixture will burn.

Temperature at which it becomes a lean mixture.

Highest mixture temperature before the fuel turns to vapour.

Temperature at which the mixture is above the boiling point.

A

Lowest temperature at which a mixture will burn.

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55
Q

An electrical distribution system is composed of service, feeders and:

Secondary circuits

Primary circuits

Branch circuits

Trunk circuits

A

Branch circuits

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56
Q

A flowing liquid has kinetic energy as a function of its velocity. When its velocity increases

Potential energy in the form of pressure will also increase

The cross-sectional area of the piping must increase

The mass quantity flowing per second will decrease

Potential energy in the form of pressure will decrease

A

Potential energy in the form of pressure will decrease

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57
Q

What do animals use to change what they eat (biomass) into energy?

water

photosynthesis

oxygen

heat from the sun

A

oxygen

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58
Q

What do the biological, chemical and geological cycles try to attain in the process of cycling?

stasis

balance

constant movement

surpluses

A

stasis

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59
Q

Foundation or centre lines of a sketch should be:

Very bold and extended

Drawn when first beginning to sketch

Heavy, dashed lines

Always done to scale

A

Drawn when first beginning to sketch

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60
Q

The steam produced by an electrode type boiler depends on the:

Voltage supplied to the immersion elements

Level of water in the basket

Number of heating elements energized

Number of electrodes energized

A

Level of water in the basket

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61
Q

This group recommends updates to the learning materials of each class of Power Engineer, and the criteria required to ensure a Power Engineer is properly qualified when a Certificate of Competency is issued.

ANSI

ACI

SOPEEC

IPECC

ASME

A

SOPEEC

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62
Q

To which of the following oil burners is the oil supplied under high pressure?

Mechanical atomizing burner

Air atomizing burner

Rotary cup burner

Steam atomizing burner

A

Mechanical atomizing burner

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63
Q

What are Chlorofluorocarbons?

They are products of incomplete combustion

They are naturally occurring gases

They are gases responsible for more photochemical smog than any other pollutant

They are man-made refrigerants.

A

They are man-made refrigerants.

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64
Q

Stack emission detection techniques must meet the standards laid out by this organization.

American Society of Mechanical Engineers

American Society for Testing and Materials

Canadian Standards Association

Underwriters Lab (Canada)

A

American Society for Testing and Materials

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65
Q

Fluidized bed boilers can successfully burn coal with ash contents as high as

30%

55%

60%

70%

A

70%

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66
Q

Where is most of the world’s carbon stored?

in the oceans

in rocks

in animals

in plants

A

in rocks

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67
Q

White cast iron has a high resistance to corrosion and abrasion, which makes it useful for:

Underground steam lines

Ash handling systems

Condensate lines

Natural gas supply lines

A

Ash handling systems

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68
Q

This group of members of jurisdictional bodies meets at least annually. Answering to the ACI, they ensure that all Power Engineer examinations meet the requirements set by the jurisdictional legislative bodies.

ANSI

ACI

SOPEEC

IPECC

ASME

A

SOPEEC

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69
Q

Lines used to indicate distance between two points on a sketch are called:

Object lines

Extension lines

Centre lines

Dimension lines

A

Dimension lines

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70
Q

The ability of a material to resist penetration is called:

Elasticity

Toughness

Hardness

Ductility

A

Hardness

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71
Q

The flow of electrons in a uniform direction is called:

Voltage drop

Electric current flow

Potential difference

Electromotive flow

A

Electric current flow

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72
Q

The Haycock boiler was:

A watertube design

A return tubular design

Used around 1720

Of welded construction

A

Used around 1720

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73
Q

In a low-pressure serpentine watertube boiler, the tubes are attached by either _______ or by using ferrules.

Welding

Expanding

Threading

Seamless fittings

A

Threading

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74
Q

“Transpiration” is the process where:

dissolved oxygen is expelled from water

water vapour goes through a phase change

plants release water

animals inhale oxygen

A

water vapour goes through a phase change

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75
Q

The ratio between the ultimate strength and the allowable stress is called the:

Ultimate stress

Maximum allowable load

Working stress

Safety factor

A

Safety factor

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76
Q

The blowoff connection on a boiler is located at the:

Water line in both firetube and watertube boilers

Bottom, or base, of the shell in the firetube boiler

Top of the mud drum in a watertube boiler

Bottom of the steam drum of a watertube boiler

A

Water line in both firetube and watertube boilers

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77
Q

The Bourdon tube is often shaped in the form of a “C”, having an arc span of about:

180 degrees

200 degrees

90 degrees

270 degrees

A

270 degrees

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78
Q

The copper tube tubular heating boiler:

Are mostly gas fired

Generates high pressure steam

Has the furnace in the upper section

Is highly susceptible to corrosion

A

Are mostly gas fired

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79
Q

Defects in a weld can also be called:

flaws

observed inclusions

discontinuities

indicators

A

discontinuities

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80
Q

A packaged watertube boiler having two mud drums is the:

“O” type

“D” type

Three drum bent-tube type

“A” type

A

A” type

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81
Q

Alternators must run at constant speed in order to maintain:

Current

Power output

Constant voltage

Frequency

A

Frequency

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82
Q

One disadvantage of using threaded connections to join pipes and fittings is that it:

is more costly

Weakens the pipe

difficult to insulate

Requires the services of a pipe fitter

A

Weakens the pipe

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83
Q

Carbon can find its way into rock via:

groundwater

the formation of sedimentary rocks

decaying plant matter

carbon dioxide carrying precipitation

A

the formation of sedimentary rocks

84
Q

The boiler blowoff valves are opened and closed in a specific sequence to:

Carry out the blowdown accurately

Prevent excessive water discharge

Maintain the boiler water level

Protect the valve closest to the boiler

A

Protect the valve closest to the boiler

85
Q

Only certified “Safety PLCs” can be used for

Conveyor sequencing

Air dryer sequencing

Burner management systems

Lime mud mixing systems

A

Burner management systems

86
Q

Cast iron boiler capacity:

Is very large compared to steel boilers

Can be increased by simply adding sections

Cannot be increased once assembly is completed

Can be increased by increasing section size

A

Can be increased by simply adding sections

87
Q

A characteristic that made early boilers very inefficient was:

small heating surface

An excess of flat surfaces

The internal furnace

Lack of good quality fuels

A

small heating surface

88
Q

What is the first step in eliminating hazards in an energy plant?

Review past accident/incident reports

Identify the hazards

survey the employees for ideas on eliminating hazards

Set up a housekeeping plan to keep the areas clean and free of hazards

A

Identify the hazards

89
Q

Definitions for terms such as “shift engineer,” “chief engineer” and “assistant engineer” may be found in:

The Canadian Labour Code

ASME Code Section VIII

CSA B-51

The Power Engineers’ Regulations of a particular jurisdiction

A

The Power Engineers’ Regulations of a particular jurisdiction

90
Q

The area under a velocity vs. time graph equals:

Distance

Speed

Acceleration

Displacement

A

Displacement

91
Q

This type of non-fusion welding is often used in the construction of refrigeration systems.

silver brazing

soldering

stick welding

hot gluing

A

silver brazing

92
Q

The most vital element to ensure effective heat transfer in a fin-type heat exchanger coil

The fin must be crimped

The fins must be made of highly conductive material

A good bond must exist between the tube and fin

Narrow fin spacing is necessary

Wide fin spacing is necessary

A

A good bond must exist between the tube and fin

93
Q

If you can reduce the hazardous nature of a liquid waste you can:

eliminate all risks of the liquid.

reclassify the liquid as non-hazardous.

eliminate the need for proper containment.

reduce or limit the effects of a containment failure.

A

reduce or limit the effects of a containment failure.

94
Q

A reducing agent or fuel could be:

Carbon monoxide

A heavy metal oxide

Hydrogen peroxide

Concentrated Sulphuric acid

A

Carbon monoxide

95
Q

Of these materials, the one most commonly used for sewage piping is

stainless steel

cast steel

cast iron

aluminum

A

cast iron

96
Q

When isolating an electric motor driven pump, you should first:

Close the pump inlet valve

Open the motor breaker

Ensure the pump is drained

Close the pump discharge valve

A

Open the motor breaker

97
Q

What tool is used to find hazards in a plant?

A Hazard Assessment and Identification process

Employee surveys

Analyzing accident and incident investigation forms

Hiring a contractor to clean up the plant site, and review the work

A

A Hazard Assessment and Identification process

98
Q

Which of the following is NOT a scalar quantity?

Velocity

Length

Volume

Time

A

Velocity

99
Q

To indicate materials of construction in a sketch, normal practice is to use:

Colour coding

Shading

Cross-hatching

Labels

A

Cross-hatching

100
Q

Cascade control utilizes:

One controller, two transmitters and two valves

Two controllers, one transmitter and two valves.

Two controllers, two transmitters and two valves.

Two controllers, two transmitters and one valve.

A

Two controllers, two transmitters and one valve.

101
Q

With regards to solid pollutants, what is a surface impoundment?

It is a warehouse where solid pollutants are stored

It is a pond or lagoon where solid pollutants are stored

It is an area to store dry solid pollutants

It is part of the conveying system meant to handle solid pollutants

A

It is a pond or lagoon where solid pollutants are stored

102
Q

The commutator of a DC machine is usually made of copper bars separated by:

Mica

Steel plates

Fibreglass

Carbon

A

Mica

103
Q

Fire pump testing should be completed:

annually

Monthly

Weekly

Annually, Monthly and weekly

A

annually

104
Q

To lessen long term environmental impact after plant closure, part of the approval process for a new industrial facility is the requirement for:

a reclamation plan.

a spill containment “farm”.

hazardous waste disposal training

an up-to-date operating procedures manual.

A

a reclamation plan.

105
Q

On a boiler blowoff system, a valve that requires at least five 360° turns of the operating mechanism to change from fully open to fully closed is known as:

a quick opening valve

a non-return valve

a slow opening valve

an isolating valve

A

a slow opening valve

106
Q

The Bourdon tube can be used with a bulb and capillary tube to measure:

Viscosity

Flow

Humidity

Temperature

A

Temperature

107
Q

What effect does preheating an area to be welded have on the weld?

it makes the weld brittle

it makes the weld more quenchable

it makes the welds more ductile

it makes the welds tough

A

it makes the welds more ductile

108
Q

When reading the dials of a kilowatt hour meter, read:

Them in the sequence shown by the letters under each

Them from left to right

The ones that rotate clockwise first

Them from right to left

A

Them from left to right

109
Q

One of the typical details shown in the Process Flow Diagram (PFD) includes:

Detailed configuration and exact location of equipment

Detailed pipe sizes

Main piping and direction of flow

All valve locations and orientation

A

Main piping and direction of flow

110
Q

During submerged arc welding, _________ prevents the weld from oxidizing and cooling too fast.

Amperage

Flux

Rod composition

Rod rate of feed

A

Flux

111
Q

Which gasket has an oval cross-section?

Flat ring

Full face

Cut asbestos

Ring joint

A

Ring joint

112
Q

Wrought iron:

Is stronger than steel

Is corrosion resistant

Is a non-ferrous metal

Contains a high percentage of carbon

A

Is corrosion resistant

113
Q

A typical application of forged steel in a power plant is:

welded pipe fittings

superheated steam lines

drain lines

ash handling systems

A

welded pipe fittings

114
Q

In the process of making iron, limestone is added to:

Pig iron moulds

The iron ore in the moulds

The blast furnace in order to form slag

Make the pig iron more malleable

A

The blast furnace in order to form slag

115
Q

The output of an immersion type electric boiler is controlled by __________ one or more elements as required.

turning the power on or off

immersing

short-circuiting

controlling the basket level of

A

turning the power on or off

116
Q

Welding together pipes that are 2 inch nominal size or smaller is usually done using:

The oxy-acetylene method

The socket weld method

The butt weld method

automatic welding machines

A

The socket weld method

117
Q

The two types of Penetrant Testing (PT) are fluorescent testing and:

Developer testing

Colour Contrast testing

Infrared testing

Viscous Penetrant testing

A

Colour Contrast testing

118
Q

Transformers are often cooled by:

immersing the core in a refrigerant bath

forced cooling with fans

immersing the core in cooling water

using windings with less insulation

A

forced cooling with fans

119
Q

In a Plant Line Trace sketch:

All valves are shown

All process flows are shown

pipe sizes are shown

only major features are shown

A

only major features are shown

120
Q

A piping and instrumentation diagram (P&ID) will show major flow lines:

with all information for those lines

with basic information for those lines

with most instrumentation

only with line size and major valves

A

with all information for those lines

121
Q

Class 1 water treatment, as per ASME section VI, is suitable for:

Cast Iron boilers

Firetube Heating Boilers

Tubular heating boilers

Watertube Heating Boilers

A

Cast Iron boilers

122
Q

____________ heat exchangers are not usually used with steam, because condensate does not easily drain from them.

U-tube

Straight Tube

Plate type

Finned Tube

A

Plate type

123
Q

The main components of a DC machine are the non-moving assembly, called the _____, and the rotor, which is also called an armature.

Wiring

Stator

Rheostat

Generator

A

Stator

124
Q

Boiler combustion is regulated by:

Varying the speed of an ID fan

Controlling or regulating the fuel flow

Varying the speed of an FD fan

Controlling the air and fuel flow

A

Controlling the air and fuel flow

125
Q

A refractory burner disadvantage is:

High cost due to complexity

Too much fuel preheat

Low radiant heat

Low combustion efficiency

A

High cost due to complexity

126
Q

Generally speaking, what are two main general methods for reducing NOx emissions in a plant?

Remove them from the flue gas or disperse nitrogen absorbers with them

Use low nitrogen fuel or reduce stack temperatures

Using low NOx burners or reducing flame temperatures

Prevent or minimize their formation or remove them after they have been generated

A

Prevent or minimize their formation or remove them after they have been generated

127
Q

In order to ensure safe and continuous operation of a pressure reducing valve, the valve station should have _________________.

A safety valve on the high-pressure side

A bypass line, plus a safety valve and pressure gauge on the low-pressure side

Thermometers on the inlet and outlet piping

A strainer immediately downstream of the valve

A

A bypass line, plus a safety valve and pressure gauge on the low-pressure side

128
Q

An advantage of expansion bends is that they are __________ than expansion joints.

stronger

easier to service

heavier

more compact

A

stronger

129
Q

Section lines of a drawing that show the material of construction are usually drawn at an angle of:

90°

30°

45°

60°

A

45°

130
Q

Inlet damper control on a fan:

Requires more power to drive the fan when the vanes are closed.

Requires less power to drive the fan at reduced loads.

Is only used on forced draft fans.

Is far less complicated than outlet damper control.

A

Requires less power to drive the fan at reduced loads.

131
Q

An electrical actuator used to position dampers and control valves is called:

A controller

A relay

A transformer

A modulating motor

A

A modulating motor

132
Q

How can the mechanical properties of a metal be restored after welding?

quench the weld

carry out a post-heat stress treatment and quench

after the weld is completed, allow the metal to cool quickly and then raise the temperature again

carry out a post weld heat treatment

A

carry out a post-heat stress treatment and quench

133
Q

The material designation marking on a valve __________________.

Indicates which manufacturing branch it originates from

Indicates the material that the valve is made from

Gives the maximum temperature for the valve material

is associated with the Canadian Registration Number

A

Indicates the material that the valve is made from

134
Q

A copper alloy that contains tin, and sometimes zinc, is:

Brass

Bronze

White metal

Babbit

A

Bronze

135
Q

The Hartford Loop prevents the water in the boiler from:

Exceeding the maximum temperature

Exceeding the highest safe level

Dropping below a safe level

Flowing out through the steam main

A

Flowing out through the steam main

136
Q

A safe work permit for cold work is intended for work:

only in freezers and cold spaces

Only for outside work in winter months

For work that will usually not cause a fire

For work that may cause a fire, but unlikely

A

For work that will usually not cause a fire

137
Q

Materials used for the manufacture of pipes for power plants MUST be:

Manufactured only in Canada

Seamless regardless of the operating conditions

Suitable for the system operating conditions

Welded and stress relieved

A

Suitable for the system operating conditions

138
Q

Increasing the spring tension in a pressure reducing valve will ___________________.

Reduce or minimize the cycling or “hunting” of the valve

Decrease the regulated pressure downstream of the valve

Allow for maintenance to be completed downstream

Increase the regulated pressure downstream of the valve

A
139
Q

The direction of the _____ on the conductor may be determined using the Left Hand Rule for Motors.

force

polarity

resistance

voltage

A

polarity

140
Q

An analog control loop output must be put through a _____ before the computer can react to the signal.

Digital converter

Signal inverter

ROM detector

Multiplexer

A

Digital converter

141
Q

What kind of problems can be detected using the visual method while a weld is taking place?

the width of the root opening

the formation of cracks

the welding machine current settings

the concavity of the weld

A

the welding machine current settings

142
Q

Gas burners for heating boilers can be divided into two general classes:

Mixing and non-mixing

Refractory and ribbon-type

In-shot and up-shot

Pre and after mix

A

Pre and after mix

143
Q

The continuous blowdown pipe on a boiler is used to:

Blow down the boiler if the pressure exceeds the maximum allowable working pressure

Remove suspended matter from the boiler

Blow chemicals into the steam drum

Remove concentrated dissolved solids from the boiler

A

Remove concentrated dissolved solids from the boiler

144
Q

The two types of Penetrant Testing (PT) are fluorescent testing and:

Developer testing

Colour Contrast testing

Infrared testing

Viscous Penetrant testing

A

Colour Contrast testing

145
Q

Aqueous film forming foam agents extinguish a fire by:

Breaking the chain reaction

Cooling and smothering

Sealing vapours, and cooling

Sealing vapours, cooling, and removing oxygen

Combining oxygen with the burning material

A

Cooling and smothering

146
Q

A compound wound DC generator has a combination of shunt and _____ characteristics, depending on the predominance of each type of winding.

Parallel

Separately-excited

Induction

Series

A

Series

147
Q

Water that leaves a blowoff tank and enters a sewer must not exceed _______ °C:

45

50

75

65

A

65

148
Q

Clamp-on ammeter readings may be inaccurate if:

Jaws are dirty or misaligned

Circuit voltage is too high

Circuit resistance is too low

Conductor insulation is too thick

A

Jaws are dirty or misaligned

149
Q

The transfer of heat involving the movement of a fluid is defined as:

Conduction

Convection

Radiation

Flux

Thermo-circulation

A

Convection

150
Q

Boilers are designed with more combustion gas passes:

Because boiler tubes cannot be manufactured in great lengths

To allow more time for heat transfer

So soot falls out in the last pass, leaving the first pass clear

To create less thermal stress on the boiler metal

A

To allow more time for heat transfer

151
Q

Orifice plates, venturi tubes and nozzles belong to the group called:

Flow meters

Pressure meters

Head meters

Analog meters

A

Head meters

152
Q

A typical extra low voltage device would be a:

Toaster

Fluorescent light

Door bell

Step-down transformer

A

Door bell

153
Q

In a vertical sectional boiler, the sections are placed:

One above the other

Side by side

On the furnace

Above the draft hood

A

Side by side

154
Q

________ provide easy assembly and dismantling of screwed piping connections.

Couplings

Flanges

Unions

Bolts

A

Unions

155
Q

A high-pressure steam boiler is one in which steam is generated at a pressure greater than:

100 kPa

  1. 3 kPa
  2. 2 kPa
  3. 4 kPa
A

100 kPa

156
Q

In piping systems, the three main types of flange gaskets are the full face, the ring joint, and the:

Corrugated Bellows type

Van Stone type

Flat ring type

Segmental ring type

A

Flat ring type

157
Q

For a pneumatic control system, it is imperative that

The maximum transmitter output signal pressure be maintained

The air supply is kept clean and dry

The control systems have built-in redundancy

The control devices are fitted with noise attenuators

A

The air supply is kept clean and dry

158
Q

A process flow diagram (PFD) shows:

All the equipment in a plant

Major piping to do with a process

All instrumentation

The physical layout of equipment

A

Major piping to do with a process

159
Q

To transfer the power to or from the rotor of alternators, ____________ are used.

Field poles

Commutators

Slip rings

Hard-wired connections

A

Slip rings

160
Q

Why were PLCs first developed?

To allow processes to be easily and quickly re-configured

To allow the use of analog input and output signals

To remove the need for feedback loops

To eliminate the need for control programming language

A

To allow processes to be easily and quickly re-configured

161
Q

This group meets at least once a year on situations which they feel are important and relevant to Power Engineers and the fulfillment of their duties and responsibilities.

ANSI

ACI

SOPEEC

IPECC

ASME

A

ACI

162
Q

The “coefficient of friction” is defined as the:

Ratio of the force required to move a body to the normal reaction force.

Force parallel to the surface required to start an object moving.

Reaction perpendicular to the surface.

Force parallel to the surface required to keep an object moving at a constant linear velocity.

A

Ratio of the force required to move a body to the normal reaction force.

163
Q

Tie breakers are used to:

Allow the interconnection of two power sources without placing them in parallel

Break the circuit in case of overload

Protect the transformer from the power source

Protect the plant service bus from the power source

A

Allow the interconnection of two power sources without placing them in parallel

164
Q

A relief valve is placed on the discharge of a fuel oil pump:

Because the pump is a dynamic type

So burner design pressure is not exceeded

To maintain a stable flame at high loads

To maintain a stable flame at low loads

A

So burner design pressure is not exceeded

165
Q

Burning metals may be extinguished using:

Dry chemical extinguishers

Carbon dioxide extinguishers

AFFF extinguishers

Dry powder extinguishers

A

Dry powder extinguishers

166
Q

Squirrels are herbivores and are also part of the food web. When a squirrel dies, what happens next?

Decomposers break it down into its basic elements

energy is released

there is a net gain in matter in the soil

carbon dioxide is released

A

Decomposers break it down into its basic elements

167
Q

The voltage induced in the secondary windings of the transformer, is _____ the turns ratio of the transformer.

proportional to

Reversed to

Opposed by

Inversely proportional to

A

proportional to

168
Q

The maximum operating temperature for a carbon steel valve is _________ °C:

280

425

650

1000

A

425

169
Q

The water flow through a modular cast iron boiler system:

Continuous through all modules

Connected in series

Intermittent, occurring only while the unit is firing

Done without the use of headers or manifolds

A

Continuous through all modules

170
Q

The purpose of the non-return valve on a boiler is to_____________________.

Prevent water from entering the steam header

Prevent the back flow of steam into the boiler

Prevent the safety valve from popping

Regulate the flow of steam from the boiler

A

Prevent the back flow of steam into the boiler

171
Q

Daily fire suppression system checks should include:

Visual inspection of fire hoses for readiness

Fire pump run test

Hydrostatic testing of sprinkler lines

Water supply valves to all systems are open and locked open if necessary

A

Visual inspection of fire hoses for readiness

172
Q

A piping and instrumentation diagram (P&ID) will show major flow lines:

with all information for those lines

with basic information for those lines

with most instrumentation

only with line size and major valves

A

with all information for those lines

173
Q

One Newton is equal to:

1 kg/s2

1 kgm/s

1 kgm/s2

1 kgm2/s

A

1 kgm/s2

174
Q

What term is connected to the movement of material and substances through the environment?

biogeochemical

hydrogeological

homeostasis

regeneration

A

biogeochemical

175
Q

With reference to scalars and vectors, a space diagram:

Shows the relationship of time to the vector.

Illustrates a system of vectors.

Shows the relationship of the scalar to the vector.

Illustrates a system of scalars.

A

Illustrates a system of vectors.

176
Q

) Proper draft is important to the plant operator because it:

Produces efficient combustion

Keeps the furnace from overheating

Reduces the quantity of ash produced

Prevents flue gas from leaking out of the boiler

A

Produces efficient combustion

177
Q

A common material used for valve packing is ____________________.

Fiberglass

Mica

Nylon

Teflon

A

Teflon

178
Q

A boiler blowoff system is equipped with slow and fast opening valves. The quick opening valve is placed:

Closest to the boiler and opened first

Furthest from the boiler and opened first

Closest to the boiler and opened last

Furthest from the boiler and opened last

A

Closest to the boiler and opened first

179
Q

If you discover an injured worker in your facility, you should ____________ on your two-way radio.

Call out “HELP”

Press the “Man Down” button

Keep radio silence

Call emergency services

A

Press the “Man Down” button

180
Q

Carbon that is not combined with hydrogen is referred to as:

Mono-carbon

Separated carbon

Free carbon

Fixed carbon

A

Fixed carbon

181
Q

Natural draft is produced in a boiler furnace when:

Hot flue gases contract so that each cubic meter has more mass

Gases in the stack have less mass than an equal column of outside air

Gases in the stack have more mass than an equal column of outside air

Hot flue gases condense

A

Gases in the stack have less mass than an equal column of outside air

182
Q

In an atmospheric fluidized bed boiler, the combustion air pressure is typically 2.5 kPa at the FD fan, 1.6 kPa of water at the base of the active bed and _____ at the top of the combustion mass:

Boiler pressure

Negative 16 cm of water

Negative pressure

Atmospheric pressure

A

Atmospheric pressure

183
Q

Combustion air for the burners is preheated in the _____ by hot flue gases.

Economizer

Air heater

Superheater

Windbox

A

Air heater

184
Q

Low fuel pressure in an constant capacity mechanical atomizing oil burner produces:

Low excess air requirements

A short blue flame

Gummy deposits in the burner nozzle

Poor atomization

A

Poor atomization

185
Q

Places where ground water leaves the system to become surface water are called:

Discharge points

Runoff areas

Recharge points

Springs

A

Discharge points

186
Q

A chromatograph uses electronic devices which:

Utilize electrical current as a measurement base

decrease in resistance with a rise in temperature, and vice versa

Increase in resistance as temperature rises

Work in conjunction with a thermocouple

A

decrease in resistance with a rise in temperature, and vice versa

187
Q

An AC motor which will drop out of synchronism and simply trip when overloaded is the:

Slip-ring induction motor

Induction motor

Wound rotor induction motor

Synchronous motor

A

Synchronous motor

188
Q

What are the main component metals of “white metal”?

copper and iron

lead and tin

aluminum and lead

bronze and tin

A

lead and tin

189
Q

Pressure controllers can be divided into two classes:

High and low temperature

High and low pressure

High and low flow

High and low voltage

A

High and low pressure

190
Q

Watt meters measure:

Apparent power

Power factor

Resistance to current flow

Active power

A

Active power

191
Q

_______ fittings are used to provide proper drainage of water.

Removable

Orifice

Eccentric

Tapered

A

Eccentric

192
Q

Rectification is the process of converting AC to _____ in a DC generator.

Heat

Direct current

Voltage

Resistance

A

Direct current

193
Q

Boiler water having the highest dissolved solids concentration is found:

At the bottom of the mud drum

At the bottom of the steam drum

At the top of the steam drum

Just below the waterline of the steam drum

A

Just below the waterline of the steam drum

194
Q

What are the three reservoirs of the carbon cycle?

trees, animals, oceans

rocks, oceans, atmosphere

rocks, plants, atmosphere

animals, oceans, atmosphere

A

rocks, oceans, atmosphere

195
Q

Beading the tube ends in a firetube boiler:

stops tube leakage

eliminates the need to expand the tubes into the tubesheet

helps prevent overheating of the tube ends

must be followed by seal welding

A

helps prevent overheating of the tube ends

196
Q

The windbox of a boiler is:

Where the fuel and air are mixed for combustion

The collector of the exhaust gases before they go into the uptake

The chamber through which combustion air is introduced to the boiler furnace

Always maintained at a negative pressure

A

The chamber through which combustion air is introduced to the boiler furnace

197
Q

In a typical bubbling fluidized bed boiler, to what depth is the combustion bed maintained?

1.5 metres

1 metre

2 metres

2.5 metres

A

1 metre

198
Q

The output voltage of a shunt DC generator is varied by adjusting the:

Field rheostat

EMF

Output current

Pole piece air gaps

A

Field rheostat

199
Q

The three markings mandatory on valves to be used in pressure piping include manufacturer’s name, material designation and _______________.

weight designation

CRN number

valve type

service designation

A

service designation

200
Q

When conducting a weld inspection, “indications” in the weld:

can always be found during a visual inspection

may be acceptable depending on the circumstances.

must cause a weld to be rejected

are found according to the methods laid out in ASME Section VIII

A

may be acceptable depending on the circumstances.

201
Q

Sound levels produced by a plant are normally not a problem as long as:

The sound levels meet guidelines

The indoor sound levels of nearby residents aren’t negatively affected

Proper hearing protection is worn

the sound levels are continuously monitored

A

The indoor sound levels of nearby residents aren’t negatively affected

202
Q

A thermo hydraulic feed water regulator uses _____ as operating media.

Oil and nitrogen

CO2 and water

Water and steam

Air and water

A

Water and steam

203
Q

____________ heat exchangers are not usually used with steam, because condensate does not easily drain from them.

U-tube

Straight Tube

Plate type

Finned Tube

A

Finned Tube

204
Q

Superheated steam:

Is produced in the saturated steam drum

Temperature is higher than the saturation temperature

Is almost dry and contains very little moisture

Cannot be used for soot blowers

Can only exist at pressures above 103 kPag

A

Temperature is higher than the saturation temperature

205
Q

For three-phase power, each conductor is _____ electrical degrees out of phase with the others.

30

90

120

180

A

120

4th Class Canada (Part A) (16 decks)

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