Test Question Answers Flashcards
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
by conducting regular safety audits
Types of furnaces surround by brickwork?
Externally fired
when chromium is added to steel it does what?
increases hardness and corrosion resistance making stainless steel (12%)
NDE
Non-destructive examination for welding parts
Steam traps may also remove out of the steam lines?
Air
Boiler parts exposed to fire or extreme heat must be covered by?
Water/watertubes
SOPs should be:
Printed in large numbers
Reviewed at regular intervals
Destroyed and replaced monthly
Attached to each revised copy.
Reviewed at regular intervals
(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
Polyhlorinated biphenyls
Atmospheric burners are used for:
small heating and power boilers under 500 kW
Ring type burners
Coal firing
Preheating the combustion air
small heating and power boilers under 500 kW
A process that causes fires to endure and renew themselves is:
Temperature
A reducing agent
An oxidizing agent
Molecular activity due to high temperature
Molecular activity due to high temperature
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.
Initial area and temperature rise.
The First Law of Thermodynamics states that heat and work
Cannot co-exist
Are mutually convertible
Are unrelated
Are identical
Produce friction
Are mutually convertible
The basic food source for all organisms is:
fungi
plankton
microorganisms
plants
plants
What efficiency can be attained by fabric filters be in a plant?
75% efficient
87% efficient
95% efficient
+99% efficient
+99% efficient
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
Dependent on the amount of matter
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
Temperature difference between condensate and steam
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
Show the main proportion of the sketch
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
Is said to be lean
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
Class 1
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
Heating value of propane
Atoms that have greater than 3 electrons in the outer shell are:
Positively charged
Good conductors
Neutrally charged
Poor conductors
Poor conductors
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
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
B-52
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
Atmospheric burners
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
it is used to attach fittings to the vessel
(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
The fuel must be preheated to 90 degrees C
The balanced equation for complete combustion of sulfur is S + O2 = _________:
SO2 + heat
2SO2 + heat
SO2
SO2 + S
SO2 + heat
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.
Conducting plant operations in an environmentally friendly way from the beginning.
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
Bead the tube
A bellows corrugated expansion joint is suitable for pressures up to approximately _______ kPa:
500
1000
2000
Unlimited
2000
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
Float cage
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
fly ash which enters the atmosphere
The property that determines whether a material can be easily magnetized is called:
Conductivity
Fluctuation
Magnetism
Permeability
Permeability
The electrical power necessary for arc welding may be supplied by:
Solar cells
Capacitors
Batteries
Transformers
Transformers
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
Concentric orifice
A PLC needs to be able to check itself for safe operation. This occurs during the:
input scan
housekeeping scan
maintenance scan
program scan
housekeeping scan
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.
Conductor motion direction, for motors
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
Class 3
In the First Law of Thermodynamics, heat supplied = increase in internal energy + ____________:
Energy supplied.
Energy absorbed.
Work input.
Work done.
Power output.
Work done.
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
Inspect the boiler shell or drum
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
CSA B52
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
Carbon dioxide and Dry chemical
On older boilers, the masonry work that surrounded the furnace was termed:
The boiler firebox
Masonry
The boiler setting
The boiler casing
The boiler setting
A diaphragm draft gauge on a furnace indicates the draft in:
mm of water column
kPa
MPa
psi
mm of water column
What is impact strength also known as?
yield strength
ultimate strength
toughness
brittleness
toughness
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
nominal inside diameter
With regards to greenhouse gases, which of the following is the most powerful?
NOx
H2O
Flourinated gases
Methane
Flourinated gases
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
Using superheated steam
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
it reduces residual stress
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
Sweating and corrosion
Medium carbon steel becomes difficult to weld when its carbon content exceeds:
10%
- 5%
- 35%
- 25%
0.35%
For the determination of what mechanical property is a Brinnell test conducted?
toughness
ductility
strength
hardness
hardness
Besides a flashlight, what else is used during a visual inspection of a weld?
microscopes
fluorescent lights
magnifying glasses
chisels
magnifying glasses
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.
Lowest temperature at which a mixture will burn.
An electrical distribution system is composed of service, feeders and:
Secondary circuits
Primary circuits
Branch circuits
Trunk circuits
Branch circuits
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
Potential energy in the form of pressure will decrease
What do animals use to change what they eat (biomass) into energy?
water
photosynthesis
oxygen
heat from the sun
oxygen
What do the biological, chemical and geological cycles try to attain in the process of cycling?
stasis
balance
constant movement
surpluses
stasis
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
Drawn when first beginning to sketch
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
Level of water in the basket
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
SOPEEC
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
Mechanical atomizing burner
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.
They are man-made refrigerants.
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)
American Society for Testing and Materials
Fluidized bed boilers can successfully burn coal with ash contents as high as
30%
55%
60%
70%
70%
Where is most of the world’s carbon stored?
in the oceans
in rocks
in animals
in plants
in rocks
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
Ash handling systems
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
SOPEEC
Lines used to indicate distance between two points on a sketch are called:
Object lines
Extension lines
Centre lines
Dimension lines
Dimension lines
The ability of a material to resist penetration is called:
Elasticity
Toughness
Hardness
Ductility
Hardness
The flow of electrons in a uniform direction is called:
Voltage drop
Electric current flow
Potential difference
Electromotive flow
Electric current flow
The Haycock boiler was:
A watertube design
A return tubular design
Used around 1720
Of welded construction
Used around 1720
In a low-pressure serpentine watertube boiler, the tubes are attached by either _______ or by using ferrules.
Welding
Expanding
Threading
Seamless fittings
Threading
“Transpiration” is the process where:
dissolved oxygen is expelled from water
water vapour goes through a phase change
plants release water
animals inhale oxygen
water vapour goes through a phase change
The ratio between the ultimate strength and the allowable stress is called the:
Ultimate stress
Maximum allowable load
Working stress
Safety factor
Safety factor
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
Water line in both firetube and watertube boilers
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
270 degrees
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
Are mostly gas fired
Defects in a weld can also be called:
flaws
observed inclusions
discontinuities
indicators
discontinuities
A packaged watertube boiler having two mud drums is the:
“O” type
“D” type
Three drum bent-tube type
“A” type
A” type
Alternators must run at constant speed in order to maintain:
Current
Power output
Constant voltage
Frequency
Frequency
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
Weakens the pipe
Carbon can find its way into rock via:
groundwater
the formation of sedimentary rocks
decaying plant matter
carbon dioxide carrying precipitation
the formation of sedimentary rocks
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
Protect the valve closest to the boiler
Only certified “Safety PLCs” can be used for
Conveyor sequencing
Air dryer sequencing
Burner management systems
Lime mud mixing systems
Burner management systems
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
Can be increased by simply adding sections
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
small heating surface
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
Identify the hazards
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
The Power Engineers’ Regulations of a particular jurisdiction
The area under a velocity vs. time graph equals:
Distance
Speed
Acceleration
Displacement
Displacement
This type of non-fusion welding is often used in the construction of refrigeration systems.
silver brazing
soldering
stick welding
hot gluing
silver brazing
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 good bond must exist between the tube and fin
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.
reduce or limit the effects of a containment failure.
A reducing agent or fuel could be:
Carbon monoxide
A heavy metal oxide
Hydrogen peroxide
Concentrated Sulphuric acid
Carbon monoxide
Of these materials, the one most commonly used for sewage piping is
stainless steel
cast steel
cast iron
aluminum
cast iron
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
Open the motor breaker
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 Hazard Assessment and Identification process
Which of the following is NOT a scalar quantity?
Velocity
Length
Volume
Time
Velocity
To indicate materials of construction in a sketch, normal practice is to use:
Colour coding
Shading
Cross-hatching
Labels
Cross-hatching
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.
Two controllers, two transmitters and one valve.
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
It is a pond or lagoon where solid pollutants are stored
The commutator of a DC machine is usually made of copper bars separated by:
Mica
Steel plates
Fibreglass
Carbon
Mica
Fire pump testing should be completed:
annually
Monthly
Weekly
Annually, Monthly and weekly
annually
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 reclamation plan.
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 slow opening valve
The Bourdon tube can be used with a bulb and capillary tube to measure:
Viscosity
Flow
Humidity
Temperature
Temperature
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
it makes the welds more ductile
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
Them from left to right
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
Main piping and direction of flow
During submerged arc welding, _________ prevents the weld from oxidizing and cooling too fast.
Amperage
Flux
Rod composition
Rod rate of feed
Flux
Which gasket has an oval cross-section?
Flat ring
Full face
Cut asbestos
Ring joint
Ring joint
Wrought iron:
Is stronger than steel
Is corrosion resistant
Is a non-ferrous metal
Contains a high percentage of carbon
Is corrosion resistant
A typical application of forged steel in a power plant is:
welded pipe fittings
superheated steam lines
drain lines
ash handling systems
welded pipe fittings
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
The blast furnace in order to form slag
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
turning the power on or off
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
The socket weld method
The two types of Penetrant Testing (PT) are fluorescent testing and:
Developer testing
Colour Contrast testing
Infrared testing
Viscous Penetrant testing
Colour Contrast testing
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
forced cooling with fans
In a Plant Line Trace sketch:
All valves are shown
All process flows are shown
pipe sizes are shown
only major features are shown
only major features are shown
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
with all information for those lines
Class 1 water treatment, as per ASME section VI, is suitable for:
Cast Iron boilers
Firetube Heating Boilers
Tubular heating boilers
Watertube Heating Boilers
Cast Iron boilers
____________ heat exchangers are not usually used with steam, because condensate does not easily drain from them.
U-tube
Straight Tube
Plate type
Finned Tube
Plate type
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
Stator
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
Controlling the air and fuel flow
A refractory burner disadvantage is:
High cost due to complexity
Too much fuel preheat
Low radiant heat
Low combustion efficiency
High cost due to complexity
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
Prevent or minimize their formation or remove them after they have been generated
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 bypass line, plus a safety valve and pressure gauge on the low-pressure side
An advantage of expansion bends is that they are __________ than expansion joints.
stronger
easier to service
heavier
more compact
stronger
Section lines of a drawing that show the material of construction are usually drawn at an angle of:
90°
30°
45°
60°
45°
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.
Requires less power to drive the fan at reduced loads.
An electrical actuator used to position dampers and control valves is called:
A controller
A relay
A transformer
A modulating motor
A modulating motor
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
carry out a post-heat stress treatment and quench
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
Indicates the material that the valve is made from
A copper alloy that contains tin, and sometimes zinc, is:
Brass
Bronze
White metal
Babbit
Bronze
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
Flowing out through the steam main
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
For work that will usually not cause a fire
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
Suitable for the system operating conditions
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
The direction of the _____ on the conductor may be determined using the Left Hand Rule for Motors.
force
polarity
resistance
voltage
polarity
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
Digital converter
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
the welding machine current settings
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
Pre and after mix
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
Remove concentrated dissolved solids from the boiler
The two types of Penetrant Testing (PT) are fluorescent testing and:
Developer testing
Colour Contrast testing
Infrared testing
Viscous Penetrant testing
Colour Contrast testing
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
Cooling and smothering
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
Series
Water that leaves a blowoff tank and enters a sewer must not exceed _______ °C:
45
50
75
65
65
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
Jaws are dirty or misaligned
The transfer of heat involving the movement of a fluid is defined as:
Conduction
Convection
Radiation
Flux
Thermo-circulation
Convection
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
To allow more time for heat transfer
Orifice plates, venturi tubes and nozzles belong to the group called:
Flow meters
Pressure meters
Head meters
Analog meters
Head meters
A typical extra low voltage device would be a:
Toaster
Fluorescent light
Door bell
Step-down transformer
Door bell
In a vertical sectional boiler, the sections are placed:
One above the other
Side by side
On the furnace
Above the draft hood
Side by side
________ provide easy assembly and dismantling of screwed piping connections.
Couplings
Flanges
Unions
Bolts
Unions
A high-pressure steam boiler is one in which steam is generated at a pressure greater than:
100 kPa
- 3 kPa
- 2 kPa
- 4 kPa
100 kPa
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
Flat ring type
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
The air supply is kept clean and dry
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
Major piping to do with a process
To transfer the power to or from the rotor of alternators, ____________ are used.
Field poles
Commutators
Slip rings
Hard-wired connections
Slip rings
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
To allow processes to be easily and quickly re-configured
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
ACI
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.
Ratio of the force required to move a body to the normal reaction force.
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
Allow the interconnection of two power sources without placing them in parallel
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
So burner design pressure is not exceeded
Burning metals may be extinguished using:
Dry chemical extinguishers
Carbon dioxide extinguishers
AFFF extinguishers
Dry powder extinguishers
Dry powder extinguishers
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
Decomposers break it down into its basic elements
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
proportional to
The maximum operating temperature for a carbon steel valve is _________ °C:
280
425
650
1000
425
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
Continuous through all modules
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
Prevent the back flow of steam into the boiler
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
Visual inspection of fire hoses for readiness
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
with all information for those lines
One Newton is equal to:
1 kg/s2
1 kgm/s
1 kgm/s2
1 kgm2/s
1 kgm/s2
What term is connected to the movement of material and substances through the environment?
biogeochemical
hydrogeological
homeostasis
regeneration
biogeochemical
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.
Illustrates a system of vectors.
) 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
Produces efficient combustion
A common material used for valve packing is ____________________.
Fiberglass
Mica
Nylon
Teflon
Teflon
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
Closest to the boiler and opened first
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
Press the “Man Down” button
Carbon that is not combined with hydrogen is referred to as:
Mono-carbon
Separated carbon
Free carbon
Fixed carbon
Fixed carbon
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
Gases in the stack have less mass than an equal column of outside air
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
Atmospheric pressure
Combustion air for the burners is preheated in the _____ by hot flue gases.
Economizer
Air heater
Superheater
Windbox
Air heater
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
Poor atomization
Places where ground water leaves the system to become surface water are called:
Discharge points
Runoff areas
Recharge points
Springs
Discharge points
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
decrease in resistance with a rise in temperature, and vice versa
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
Synchronous motor
What are the main component metals of “white metal”?
copper and iron
lead and tin
aluminum and lead
bronze and tin
lead and tin
Pressure controllers can be divided into two classes:
High and low temperature
High and low pressure
High and low flow
High and low voltage
High and low pressure
Watt meters measure:
Apparent power
Power factor
Resistance to current flow
Active power
Active power
_______ fittings are used to provide proper drainage of water.
Removable
Orifice
Eccentric
Tapered
Eccentric
Rectification is the process of converting AC to _____ in a DC generator.
Heat
Direct current
Voltage
Resistance
Direct current
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
Just below the waterline of the steam drum
What are the three reservoirs of the carbon cycle?
trees, animals, oceans
rocks, oceans, atmosphere
rocks, plants, atmosphere
animals, oceans, atmosphere
rocks, oceans, atmosphere
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
helps prevent overheating of the tube ends
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
The chamber through which combustion air is introduced to the boiler furnace
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
1 metre
The output voltage of a shunt DC generator is varied by adjusting the:
Field rheostat
EMF
Output current
Pole piece air gaps
Field rheostat
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
service designation
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
may be acceptable depending on the circumstances.
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
The indoor sound levels of nearby residents aren’t negatively affected
A thermo hydraulic feed water regulator uses _____ as operating media.
Oil and nitrogen
CO2 and water
Water and steam
Air and water
Water and steam
____________ heat exchangers are not usually used with steam, because condensate does not easily drain from them.
U-tube
Straight Tube
Plate type
Finned Tube
Finned Tube
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
Temperature is higher than the saturation temperature
For three-phase power, each conductor is _____ electrical degrees out of phase with the others.
30
90
120
180
120
