A2 Comprehensive Review

Question 1

An AC kilowatt meter can be described as:
Select one:

a.
A meter that measures and records the amount of power produced by the generator

b.
Giving an indication of the DC current that is being supplied to the generators field windings

c.
A measurement of the reactive power that is generated by the AC generation system

d.
A measurement of the inductive power that is generated by the AC generation system

e.
An indicator of the AC kilowatts that the generator is producing

Answer 1

e.
An indicator of the AC kilowatts that the generator is producing

Question 2

A 200 m long steam line is installed in a plant at an ambient temperature of 15°C. When in service, the line will carry steam at 400°C. How much does the length of the line increase when placed into service? The coefficient of expansion is 12 x 10–6 /°C.
Select one:

A.
2.0 m

B.
0.5 m

C.
0.924 m

D.
1.55 m

E.
0.785 m

Answer 2

C.
0.924 m

Question 3

A2C13Q42 Which of the following uses continuous (non-sequential) control?
Select one:

a.
Boiler water level control

b.
Soot blowing

c.
Demineralizer regeneration

d.
Turbine start-up

Answer 3

a.
Boiler water level control

Question 4

Loop alarms:
Select one:

a.
Are acknowledged and ignored until they activate for a second time

b.
Are visual only

c.
Are displayed only on a computer screen

d.
May be audible and visible

e.
Are only displayed on an annunciator panel

Answer 4

d.
May be audible and visible

Question 5

Viscosity of fuel oil _____ as the temperature increases and becomes nearly constant, above 120°C.
Select one:

a.
Decreases

b.
Increases

c.
Decreases at first and then increases

d.
Fluctuates

e.
Remains unchanged

Answer 5

a.
Decreases

Question 6

The type of safe work permit required is determined by the nature of the work and the _____ that must be eliminated or controlled.
Select one:

A.
Problem

B.
Hazards

C.
Environment

D.
Conditions

E.
Safety factor

Answer 6

B.
Hazards

Question 7

A2C01Q17 According to ASME Section I, when two or more boilers are connected into a common steam header, the connection from each boiler shall be fitted with:
Select one:

a.
at least three drains

b.
one stop valve

c.
three stop valves

d.
two stop valves with a free-blow drain in between them

Answer 7

d.
two stop valves with a free-blow drain in between them

Question 8

The letters CRN stand for:
Select one:

A.
Cancelled Registration Number

B.
Canadian Repair Number

C.
Certified Repair Number

D.
Canadian Registration Number

E.
Centralized Registration Numbers

Answer 8

D.
Canadian Registration Number

Question 9

What is the peak-to-peak value of voltage with a maximum value 170 V?
Select one:

A.
280 V

B.
300 V

C.
340 V

D.
350 V

E.
460 V

Answer 9

C.
340 V

Question 10

To calculate the change in length of a pipe, which of the following factors must be considered?
1. Out-of-service temperature
2. In-service temperature
3. Coefficient of linear expansion
4. The length of the pipe
5. The material of construction
Select one:

a.
1, 2, 3

b.
2, 3, 4

c.
3, 4, 5

d.
2, 3, 4, 5

e.
1, 2, 3, 4

Answer 10

e.
1, 2, 3, 4

Question 11

A2C13Q07 In a DCS, where are ADCs and DACs located?
Select one:

a.
Digital I/O modules

b.
Analog I/O modules

c.
In the discrete I/O modules

d.
Controller microprocessor

Answer 11

b.
Analog I/O modules

Question 12

Circuit voltage is 24. Current is 10 amps. The resistance is:
Select one:

a.
240 ohms

b.
0.240 micro-ohms

c.
2.4 ohms

d.
0.416 ohms

e.
24 ohms

Answer 12

c.
2.4 ohms

Question 13

The fixed water spray piping system is connected to a water supply through a _____ valve that can be actuated both automatically and manually to initiate the flow of water.
Select one:

a.
Water

b.
Globe

c.
Control

d.
Deluge

e.
Double ported

Answer 13

d.
Deluge

Question 14

The following meter readings were taken in an inductive single-phase circuit: wattmeter, 2800W; voltmeter, 120 V; ammeter, 25 A; and frequency meter, 60 Hz. Find the power factor.
Select one:

a.
0.90

b.
0.91

c.
0.93

d.
0.95

e.
0.96

Answer 14

c.
0.93

Question 15

Which of the following factors should be considered in steam trap selection?
1. Condensate capacity, under start-up
2. Condensate capacity, under normal operating conditions
3. Condensate temperature that the trap will have to handle
4. Steam header temperature
5. Pressure differential across the trap
6. The location of the trap
Select one:

a.
1, 3, 4, 5, 6

b.
1, 2, 3, 4, 5, 6

c.
1, 2, 3, 5, 6

d.
1, 2, 3, 4

e.
5, 6

Answer 15

b.
1, 2, 3, 4, 5, 6

Question 16

A2C01Q20 What is the name for the controls, fittings, or devices that are attached to a boiler or pressure vessel?
Select one:

a.
Encumbrances

b.
Trimmings

c.
Interlocks

d.
Appurtenances

Answer 16

d.
Appurtenances

Question 17

An induction motor starting when directly connected to the source:
Select one:

a.
Requires very little current for start-up

b.
Needs slightly more current for start-up

c.
Needs only normal current and voltage for start-up

d.
Requires up to six times its full-load current for start-up

e.
Requires a starting motor

Answer 17

d.
Requires up to six times its full-load current for start-up

Question 18

The heating value of natural gas will vary according to its:
Select one:

a.
Colour

b.
Density

c.
Weight

d.
Volume

e.
Constituents

Answer 18

e.
Constituents

Question 19

Which of the following extinguishers would ordinarily be used to combat a Class C fire?
1. Carbon dioxide
2. Foam
3. Dry chemical
4. Water
Select one:

a.
1, 2

b.
1, 3

c.
2, 3

d.
1, 4

e.
3, 4

Answer 19

b.
1, 3

Question 20

A2C10Q09 A circuit or load with a __________ power factor requires more current than the same circuit or load with a power factor closer to 1.0.
Select one:

a.
Vibrant

b.
Low

c.
High

d.
Vigorous

Answer 20

b.
Low

Question 21

A2C13Q19 Which of the following communication systems is the most suited for continuous communication between an RTU and the main SCADA computer?
Select one:

a.
Geosynchronous satellite

b.
Fibre optic cables

c.
Cellular phone

d.
UHF radio

Answer 21

b.
Fibre optic cables

Question 22

An undesirable feature of the orifice plate is _____.
Select one:

a.
The low permanent velocity loss

b.
The permanent pressure loss downstream

c.
Inability to change orifice sizes

d.
Difficult installation and replacement

e.
Only a full circular orifice may be used

Answer 22

b.
The permanent pressure loss downstream

Question 23

A Wheatstone bridge that has R1 of 3000 ohms, R2 of 8000 ohms, R3 variable, and R4 of 15 ohms, the R3 would balance at:
Select one:

a.
5.625 ohms

b.
40 ohms

c.
56.25 ohms

d.
562.5 ohms

e.
1.6 megohms

Answer 23

a.
5.625 ohms

Question 24

Modern transformers are very efficient devices with large industrial transformers, often better than _____ efficient.
Select one:

a.
95%

b.
85%

c.
75%

d.
65%

e.
55%

Answer 24

a.
95%

Question 25

When paralleling alternators, the incoming alternator must be at the same _____ as the system voltage.
Select one:

a.
Impedence

b.
Conductance

c.
Voltage

d.
Amperage

e.
Current

Answer 25

c.
Voltage

Question 26

Choose the statements that are correct for a confined space:
1. Is enclosed or partially enclosed.
2. Is designed or intended for continuous human occupancy.
3. Has limited or restricted means for entry or exit that may complicate the provision of first aid, evacuation, rescue or other emergency response service.
4. Is not large enough for configured so a worker can enter to perform assigned work.
Select one:

A.
1, 2, 3

B.
2, 3, 4

C.
1, 2, 4

D.
1, 3,

E.
1, 2, 3, 4

Answer 26

D.
1, 3,

Question 27

The outside screw and yoke valve have:
Select one:

a.
The stem threads inside of the valve body

b.
The stem threads outside of the valve body

c.
Temperature changes causing in-stem galling

d.
Threads inside the bonnet

e.
A non-rising stem

Answer 27

b.
The stem threads outside of the valve body

Question 28

Current transformers are:
Select one:

a.
Power step-up transformers

b.
Current step-up transformers

c.
Rectifying transformers

d.
High power factor transformers

e.
Voltage step-up transformers

Answer 28

e.
Voltage step-up transformers

Question 29

A2C13Q46 The PLC power supply converts
Select one:

a.
120 VDC or 240 VDC to 24 VAC

b.
120 VDC to 24 VAC

c.
Solar power to battery power

d.
120 VAC or 240 VAC to 24 VDC

Answer 29

d.
120 VAC or 240 VAC to 24 VDC

Question 30

A2C01Q17 According to ASME BPVC Section I, when two or more boilers are connected into a common steam header, what must the connection from each boiler be fitted with?
Select one:

a.
One stop valve

b.
Three stop valves

c.
Two stop valves with a free-blow drain in between them

d.
At least three drains

Answer 30

c.
Two stop valves with a free-blow drain in between them

Question 31

The purpose of the AC kilo-VAR meter is to:
Select one:

A.
Indicate the DC voltage that is being supplied to the generator’s field windings

B.
Indicate the AC voltage that is being produced by the three-phase generator

C.
Indicate the DC current that is being supplied to the generator’s field windings

D.
Indicate the AC current that is being produced by the three-phase generator

E.
Indicate the reactive power being generated by the AC generation system

Answer 31

E.
Indicate the reactive power being generated by the AC generation system

Question 32

Calculate the maximum allowable working pressure, in kPa, for a watertube boiler tube, which has an outside diameter of 73.5 mm and a minimum wall thickness of 4.71 mm. The tube is strength-welded into place in the boiler and is located in the furnace area of the boiler. Tube material is carbon steel, SA-192, with a mean wall temperature of 280°C.
Select one:

a.
8.52 MPa

b.
11.54 MPa

c.
10 MPa

d.
22 MPa

e.
6.54 MPa

Answer 32

b.
11.54 MPa

Question 33

The key elements of a successful emergency response plan include which of the following?
1. Identifying the most probable emergencies
2. Notifying process (who and when)
3. Determining the immediate personnel actions to be taken
4. Minimizing any adverse effects on personnel, property, and environment
Select one:

A.
1, 2, 3

B.
2, 3, 4

C.
1, 3, 4

D.
1, 2, 4

E.
1, 2, 3, 4

Answer 33

E.
1, 2, 3, 4

Question 34

Wound-rotor motor starters:
Select one:

a.
Allow for high resistance in the stator circuit for starting

b.
Reduce the resistance for starting

c.
Use split-phase for starting

d.
Insert external resistances into the rotor circuit during starting

e.
Increase the starting current

Answer 34

d.
Insert external resistances into the rotor circuit during starting

Question 35

A2C10Q03 In a Wheatstone bridge circuit with two known resistances, an unknown resistor could be determined by balancing another variable resistor until the potential difference across the galvanometer is zero.
Select one:

a.
True

b.
False

Answer 35

a.
True

Question 36

You must use a workplace label in which of the following situations?
1. You decant (pour) a hazardous product from its original container into another container for use in the workplace.
2. You transfer a hazardous product from a bulk container into another container for use in the workplace.
3. The supplier label is illegible, damaged, or lost.
4. If you decant product for immediate use.
Select one:

A.
1, 3, 4

B.
2, 3

C.
2, 3, 4

D.
1, 2

E.
1, 2, 3

Answer 36

E.
1, 2, 3

Question 37

If several traps drain into a common return header, a _____ valve should be installed between the trap and the return header.
Select one:

a.
Check

b.
Globe

c.
Gate

d.
Control

e.
Butterfly

Answer 37

a.
Check

Question 38

A2C13Q63 What is a function block that performs proportional control with integral and derivative known as?
Select one:

a.
MAX

b.
EXP

c.
PID

d.
PRO

Answer 38

c.
PID

Question 39

When metal cladding is used in chemical installations where there are caustic lines, the insulation is covered or wrapped with _____.
Select one:

A.
Stainless steel

B.
Canvas

C.
Linen

D.
Galvanized tin

E.
Aluminum

Answer 39

A.
Stainless steel

Question 40

A2C15Q05 A firewater storage tank is a large capacity tank, between __________________, with a level that is constantly maintained from an outside source. It should be dedicated solely for firewater to ensure it always has the maximum level available.
Select one:

a.
2000 m3 and 4000 m3

b.
5000 m3 and 9000m3

c.
4000 m3 and 8000 m3

d.
1000 m3 and 2000 m3

Answer 40

d.
1000 m3 and 2000 m3

Question 41

The function of the occupational health and safety committee is to initiate and assist in the _____ of health and safety expectations and safe systems of work.
Select one:

A.
Enforcement

B.
Development

C.
Initiation

D.
Amendments

E.
Creation

Answer 41

B.
Development

Question 42

What is the peak-to-peak alternating current value if the RMS current value is 20 A?
Select one:

a.
55.00 A

b.
56.58 A

c.
62.75 A

d.
65 A

e.
78 A

Answer 42

b.
56.58 A

Question 43

Pre-action sprinkler systems are typically used in which of the following?
1. Computer equipment rooms
2. Communication equipment rooms
3. Museums
Select one:

a.
1

b.
2

c.
2, 3

d.
1, 2

e.
1, 2, 3

Answer 43

e.
1, 2, 3

Question 44

A2C13Q40 How can the OR function be illustrated?
Select one:

a.
By switches in series

b.
By switches in parallel

c.
By a rectification circuit

d.
By an inverter gate

Answer 44

b.
By switches in parallel

Question 45

A2C13Q04 Which of the following is a fundamental component of a distributed control system?
Select one:

a.
Remote terminal unit

b.
Input/output cards

c.
Modems

d.
Radio transmitters

Answer 45

b.
Input/output cards

Question 46

What effect does doubling both the voltage and resistance in a circuit have on the current?
Select one:

a.
Current is doubled.

b.
Current is reduced by half.

c.
Current is reduced to ¼.

d.
Current remains the same.

e.
Current is tripled.

Answer 46

d.
Current remains the same.

Question 47

Examples of Class C hazards include which of the following?
1. A carpenter handling rough lumber without gloves.
2. A strong rancid odor from cutting oil, circulating in the bed of a large lathe.
3. Working without protective equipment.
4. Working without a fall-arresting device when required.
Select one:

A.
1, 2

B.
1, 4

C.
1, 3, 4

D.
2, 3, 4

E.
1, 2, 3, 4

Answer 47

A.
1, 2

Question 48

Transformers function on the principle of:
Select one:

a.
Conductance

b.
High resistance to DC current

c.
Interaction of residual magnetism

d.
Mutual inductance

e.
Mutual conductance

Answer 48

d.
Mutual inductance

Question 49

Two lamps in a series circuit have equal and unknown resistance. Voltage is 220 and 2.75 amps. The resistance of each lamp is:
Select one:

a.
10 ohms

b.
20 ohms

c.
30 ohms

d.
40 ohms

e.
80 ohms

Answer 49

d.
40 ohms

Question 50

Dry chemical extinguishing agents based on potassium bicarbonate (Purple-K) are about _______ as effective as those based on sodium bicarbonate.
Select one:

a.
Half

b.
Equally

c.
Twice

d.
Three times

e.
Five times

Answer 50

c.
Twice

Question 51

Which of the following could have a Class D fire?
Select one:

a.
Cloth and paper

b.
Lubricating oils

c.
Magnesium

d.
Live electrical wire

e.
Ordinary combustibles

Answer 51

c.
Magnesium

Question 52

Pneumatic switches are available for _____ sensing.
1. Level
2. Pressure
3. Viscosity
4. Temperature
5. Density
6. Flow
Select one:

a.
1

b.
1, 2, 3

c.
1, 4, 5, 6

d.
1, 2, 4, 6

e.
1, 2, 3, 4, 5, 6

Answer 52

d.
1, 2, 4, 6

Question 53

The primary purposes of insulation include which of the following?
1. Retaining heat in hot lines
2. Preventing corrosion of metal surfaces
3. Preventing high temperature in power plant buildings
4. Preventing injury to personnel
Select one:

a.
2, 3, 4

b.
1, 2, 3

c.
1, 3, 4

d.
1, 2, 4

e.
1, 2, 3, 4

Answer 53

c.
1, 3, 4

Question 54

A2C13Q28 With regard to computerized process trend displays, which of the following statements is true?
Select one:

a.
Operators can only observe one trend at a time

b.
The time scale for the trend line is fixed

c.
Trend displays do not show the numerical value of process conditions

d.
One trend line can be scaled independent of the other trend lines

Answer 54

d.
One trend line can be scaled independent of the other trend lines

Question 55

A double-seated balance valve could be described as:
Select one:

a.
Having a valve plug that moves inside a removable cage that holds down a seating ring.

b.
A valve body with cage-style trim, balanced plug, and soft seat. It is single-ported as only one seat ring is used.

c.
Passing up to twice as much fluid as a single port valve. It generally divides the flow in half through two control ports.

d.
Having downstream pressure act on both the top and bottom of the valve plug, thereby equalizing most of the forces.

e.
Being ideal for positive shut-off service.

Answer 55

c.
Passing up to twice as much fluid as a single port valve. It generally divides the flow in half through two control ports.

Question 56

A2C13Q12 ________________ require more plant-specific customization (programming, configuration, and tuning).
Select one:

a.
HMIs

b.
SCADA systems

c.
DCSs

d.
PLCs

Answer 56

b.
SCADA systems

Question 57

Red brass is composed of:
Select one:

a.
Copper and nickel

b.
Copper and aluminum

c.
Copper and silicon

d.
Copper, antimony, lead, and zinc

e.
Copper and brass

Answer 57

d.
Copper, antimony, lead, and zinc

Question 58

A2C13Q33 What does an AND logic gate have?
Select one:

a.
Two binary inputs and one binary output

b.
One binary input and one binary output

c.
One binary input and two binary outputs

d.
Two binary inputs and two binary outputs

Answer 58

a.
Two binary inputs and one binary output

Question 59

A2C07Q02 The production of a voltage across an inductor as a result of its own changing magnetic field is called:
Select one:

a.
Self-inductance

b.
Faraday’s second law

c.
Counter EMF

d.
Flux density

Answer 59

a.
Self-inductance

Question 60

A2C01Q05 What activity restores a boiler to its original condition as per the manufacturer’s data report?
Select one:

a.
An alteration

b.
A restoration

c.
A repair

d.
A retro-fit

Answer 60

c.
A repair

Question 61

A2C13Q60 What is the function block TOF?
Select one:

a.
An on-delay timer

b.
A time of day reporter

c.
A counter that tells how long a process has been off

d.
An off-delay timer

Answer 61

d.
An off-delay timer

Question 62

If the resistance in a circuit was kept constant and the applied voltage was increased, there would be:
Select one:

a.
A corresponding decrease in current

b.
No change in current

c.
A corresponding increase in current

d.
No change in resistance

e.
A corresponding decrease in resistance

Answer 62

c.
A corresponding increase in current

Question 63

A2C10Q01 In Kirchhoff’s current law (KCL), the algebraic sums of the currents at any electrical junction (node) must equal zero.
Select one:

a.
False

b.
True

Answer 63

b.
True

Question 64

A2C03Q07 If a petroleum distillate has a specific gravity of 0.8498, what is the equivalent API gravity?
Select one:

a.
35 degrees API

b.
1000 kg/m3

c.
32 degrees API

d.
849 kg/m3

Answer 64

a.
35 degrees API

Question 65

When a current carrying conductor is placed in a magnetic field, the field produced by the conductor _____ the magnetic field between the poles.
Select one:

a.
Adds to

b.
Subtracts from

c.
Distorts

d.
Crosses

e.
Straightens

Answer 65

c.
Distorts

Question 66

One-watt hour equals:
Select one:

a.
36 J

b.
60 J

c.
3.6 kJ

d.
3600 kJ

e.
36 MJ

Answer 66

c.
3.6 kJ

Question 67

A2C01Q08 Which ASME BPVC code section contains the Recommended Rules for the Care and Operation of Power Boilers?
Select one:

a.
Section VII

b.
Section IV

c.
Section VI

d.
Section IX

Answer 67

a.
Section VII

Question 68

A2C05Q05 Besides the rapid closing of a valve, what else might cause flow-induced water hammer?
Select one:

a.
A high pressure differential across a steam trap

b.
The gradual blockage of a steam trap

c.
The rapid opening of a valve

d.
A centrifugal pump suddenly tripping out

Answer 68

d.
A centrifugal pump suddenly tripping out

Question 69

What is the maximum alternating current values if the RMS current value is 20 A?
Select one:

a.
25.22 A max.

b.
28.29 A max.

c.
30.25 A max.

d.
35 A max.

e.
48 A max.

Answer 69

b.
28.29 A max.

Question 70

What current will flow when a 10 μF capacitor is connected to a 240 V, 60 Hz supply?
Select one:

a.
0.75 A

b.
0.9 A

c.
1.0 A

d.
1.25 A

e.
1.75 A

Answer 70

b.
0.9 A

Question 71

Non-ferrous metals are those containing significant amounts of which components?
Select one:

a.
Iron and red brass

b.
Nickel and iron

c.
Admiralty brass and iron

d.
Aluminum brass and copper

e.
Iron and aluminum

Answer 71

d.
Aluminum brass and copper

Question 72

A2C01Q02 What is the name for the specific rules developed under a provincial act?
Select one:

a.
Clauses

b.
Provisions

c.
Laws

d.
Regulations

Answer 72

d.
Regulations

Question 73

A2C01Q16 What type of additional requirement is necessary for ammonia refrigeration systems?
Select one:

a.
There shall be a closed ventilation system in operation

b.
There must be a control panel that is painted red

c.
Centrifugal compressors only must be installed

d.
The system must be installed in a Class T machinery room

Answer 73

d.
The system must be installed in a Class T machinery room

Question 74

A watertube boiler is gas-fired and has 65 m² of boiler heating surface, plus 85 m² of waterwall surface. What is the minimum required relieving capacity for all the PRVs?
Select one:

a.
9815 kg/h

b.
12000 kg/h

c.
14500 kg/h

d.
10000 kg/h

e.
8900 kg/h

Answer 74

a.
9815 kg/h

Question 75

A dual supply system is one in which two independent power lines are used to _____ the same load.
Select one:

a.
Make

b.
Supply

c.
Balance

d.
Carry

e.
Distribute

Answer 75

b.
Supply

Question 76

Which best describes a spring-loaded diaphragm actuator?
Select one:

a.
It has a diaphragm and a diaphragm plate connected to an actuator stem.

b.
The adjusting spring allows external setting or adjustment of the initial spring compression.

c.
It has no springs and is often used in applications requiring a valve positioner.

d.
They are employed in small size systems where on and off operation is required.

e.
The spring is connected to the diaphragm by the stem.

Answer 76

a.
It has a diaphragm and a diaphragm plate connected to an actuator stem.

Question 77

A2C01Q06 Which ASME BPVC code section contains the Rules of Construction for Heating Boilers?
Select one:

a.
Section VI

b.
Section IX

c.
Section IV

d.
Section I

Answer 77

c.
Section IV

Question 78

A2C13Q44 Which of the following has only two possible conditions?
Select one:

a.
Discrete inputs

b.
Analog inputs

c.
Analog outputs

d.
Milliamp signals

Answer 78

a.
Discrete inputs

Question 79

A2C05Q04 When the inlet and outlet to a steam trap are checked, it is noted that they are at the same temperature. This could mean that the trap line is blocked or that the trap is undersized. What other factors would indicate that the trap is undersized?
Select one:

a.
The trap would make a rattling noise

b.
The trap would only discharge condensate intermittently

c.
The trap would be silent

d.
The trap would have a continuous, smooth discharge

Answer 79

d.
The trap would have a continuous, smooth discharge

Question 80

In analog instrument loops, ______ convert physical quantities into electrical signals that represent those quantities.
Select one:

a.
Controllers

b.
Amplifiers

c.
Transmitters

d.
Analog switches

e.
Transducers

Answer 80

c.
Transmitters

Question 81

The following meter readings were taken in an inductive single-phase circuit: wattmeter, 2400 W; voltmeter, 240 V; ammeter, 15 A; and frequency meter, 60 Hz. Note that a wattmeter indicates the real (active) power and voltmeters and ammeters indicate effective (rms) values. Find the apparent power (VA).
Select one:

a.
3600 VA

b.
3200 VA

c.
2800 VA

d.
2500 VA

e.
2000 VA

Answer 81

a.
3600 VA

Question 82

The three basic ways in which a self excited generator field can be connected are classified as:
1. Shunt
2. Compound
3. Series
4. Parallel
Select one:

a.
1, 3, 4

b.
2, 3, 4

c.
1, 2, 4

d.
1, 2, 3

e.
1, 2, 3, 4

Answer 82

d.
1, 2, 3

Question 83

A2C13Q52 Each input and each output is identified with ____________ so they can be identified and addressed by the PLC program.
Select one:

a.
Tag names

b.
Logical expressions

c.
Code names

d.
Comments

Answer 83

a.
Tag names

Question 84

Transformers are used for:
1. Stepping up AC voltage
2. Stepping down AC voltage
3. Transforming AC voltage to DC voltage
4. Rectifying DC voltage to AC voltage
Select one:

a.
1, 2

b.
1, 2, 3

c.
1, 2, 4

d.
1, 3, 4

e.
1, 2, 3, 4

Answer 84

a.
1, 2

Question 85

Optical pyrometers are used:
Select one:

a.
To view flame in the boiler

b.
On oil-fired boilers only

c.
To measure temperature

d.
To protect the eyes when viewing a flame

e.
To measure the temperature of steam

Answer 85

c.
To measure temperature

Question 86

In a proportional-plus-reset controller, the reset time can be varied by manipulating the _____ adjustment value.
Select one:

a.
Integral

b.
Proportional

c.
Derivative

d.
Gain

e.
Set point

Answer 86

a.
Integral

Question 87

Calculate the required minimum thickness (in mm) of steam piping that will carry steam at a pressure of 4300 kPa gauge and a temperature of 370°C. The piping is plain-end with an outside diameter of 273.05 mm. The material is low alloy steel, SA-335 P11. A manufacturer’s tolerance of 12.5% must be added to the pipe. Use S= 104.
Select one:

a.
5.55 mm + tolerance = 6.25 mm

b.
6.51 mm + tolerance = 7.21 mm

c.
8.55 mm + tolerance = 9.55 mm

d.
5.00 mm + tolerance = 6.00 mm

e.
8.75 mm + tolerance = 7.25 mm

Answer 87

a.
5.55 mm + tolerance = 6.25 mm

Question 88

The responsibilities of a standby person includes which of the following?
1. Being present while a worker is inside a confined space
2. Being in continuous communication with the worker inside the confined space
3. Having a means to immediately summon rescue personnel
Select one:

A.
1, 2

B.
2, 3

C.
1, 3

D.
3

E.
1, 2, 3

Answer 88

E.
1, 2, 3

Question 89

What code contains Recommended Guidelines for the Care of Power Boilers?
Select one:

A.
CSA-B52

B.
ASME BPVC, Section I

C.
CSA-B51

D.
ASME BPVC, Section VII

E.
NFPA-1001

Answer 89

D.
ASME BPVC, Section VII

Question 90

A2C13Q32 What does a NOT logic gate have?
Select one:

a.
One binary input and two binary outputs

b.
One binary input and one binary output

c.
Two binary inputs and two binary outputs

d.
Two binary inputs and one binary output

Answer 90

b.
One binary input and one binary output

Question 91

What determines the classification of the certificate of competency required for the role of chief Power Engineer?
Select one:

A.
Product classification

B.
Number of employees

C.
Type of feedstock used

D.
Kilowatt rating of the power plant

E.
ASME regulations

Answer 91

D.
Kilowatt rating of the power plant

Question 92

What is the period of a 60 Hz wave?
Select one:

a.
0.0167 s

b.
0.018 s

c.
0.01 s

d.
0.02 s

e.
0.1 s

Answer 92

a.
0.0167 s

Question 93

A method of overcoming armature reaction is by:
Select one:

a.
Placing the brushes at the air gaps.

b.
Feeding AC current into the brushes.

c.
Inserting interpoles between the main poles.

d.
Reversing the brushes of the armature conductors.

e.
Correcting the positions of the poles.

Answer 93

c.
Inserting interpoles between the main poles.

Question 94

A2C13Q55 Which of the following is not a PLC programming language?
Select one:

a.
Structured text

b.
Esperanto

c.
Function block diagram

d.
Ladder diagram

Answer 94

b.
Esperanto

Question 95

It is very important when commissioning a piping system to be aware of the piping expansion. Which of the following factors must be monitored closely?
1. Piping anchors
2. Expansion joints
3. Pipe bends
4. Valves and flanges
Select one:

a.
1, 2

b.
2, 3

c.
3, 4

d.
2, 3

e.
1, 4

Answer 95

a.
1, 2

Question 96

To prevent freezing of an industrial firewater system, a safe rule to follow is to ensure the top of the buried pipe is not less than _____ below the lowest frost line for the locality.
Select one:

a.
0.3 m

b.
0.5 m

c.
1.0 m

d.
1. 5 m

e.
2.0 m

Answer 96

a.
0.3 m

Question 97

A2C13Q58 AND, NOT, and OR are examples of _______________ function blocks.
Select one:

a.
Predefined logical

b.
User-defined mathematical

c.
User-defined logical

d.
Predefined mathematical

Answer 97

a.
Predefined logical

Question 98

DC motors are restricted to a starting current of about _____ percent of full load current.
Select one:

a.
50

b.
100

c.
150

d.
200

e.
250

Answer 98

c.
150

Question 99

A2C07Q01 The voltage produced in an inductor as a result of the changing magnetic field of another inductor is called:
Select one:

a.
Mutual inductance

b.
Proximity inductance

c.
Self-inductance

d.
Common inductance

Answer 99

a.
Mutual inductance

Question 100

What code contains Rules for Construction of Power Boilers?
Select one:

A.
CSA-B52

B.
ASME BPVC, Section I

C.
CSA-B51

D.
ASME BPVC, Section VIII

E.
NFPA

Answer 100

B.
ASME BPVC, Section I

Question 101

A2C01Q11 What is the name of the National Board stamp for repairs and alterations?
Select one:

a.
R stamp

b.
AAA stamp

c.
S stamp

d.
T stamp

Answer 101

a.
R stamp

Question 102

A2C13Q10 What can an operator do to stabilize a process?
Select one:

a.
Switch control from manual to automatic

b.
Lower the set point

c.
Switch control from automatic to manual

d.
Increase the control output signal

Answer 102

c.
Switch control from automatic to manual

Question 103

Venturi tubes are _______ efficient than an orifice plate with the same pipe size in terms of pressure recovery downstream of the constriction.

Select one:

a.
Considerably less

b.
Less

c.
Equally

d.
More

Answer 103

d.
More

Question 104

Municipal wastes generally contain large amounts of _____ material that may be suitable for use as a fuel.
Select one:

a.
Biomass

b.
Cardboard

c.
Plastic

d.
Wood

e.
Waste

Answer 104

a.
Biomass

Question 105

The two broad classifications of plastic piping materials are which of the following?
1. Thermoplastics
2. Thermosets
3. Polyvinal chloride
4. Polyethylene
5. Acrylonitrile butadiene styrene
6. Polybutylene
7. Chlorinated polyvinal chloride
Select one:

a.
1, 2

b.
3, 4

c.
5, 6

d.
1, 7

e.
3, 5

Answer 105

a.
1, 2

Question 106

A fluidized bed of limestone will significantly reduce ______________ emissions by the combination of sulfur dioxide with the limestone.
Select one:

a.
Sulfur dioxide

b.
Nitrous oxide

c.
Carbon dioxide

d.
Oxygen

e.
Nitrogen

Answer 106

a.
Sulfur dioxide

Question 107

A2C07Q05 Temporary magnets ______________.
Select one:

a.
Are easy to magnetize

b.
Have high retentivity

c.
Are difficult to magnetize

d.
Retain their magnetic characteristics easily

Answer 107

a.
Are easy to magnetize

Question 108

Line impedance starting:
Select one:

a.
Gives higher starting torque

b.
Gives a lower starting torque

c.
Is a more costly method than others

d.
Is used only on rotating switch starters

e.
Is a relatively expensive method

Answer 108

b.
Gives a lower starting torque

Question 109

Bellows type elements are generally used to measure pressures below _____ kPa.
Select one:

a.
50

b.
150

c.
250

d.
350

e.
340

Answer 109

d.
350

Question 110

When an approximate constant speed is to be maintained between no-load and full-load, the best DC motor to use would be:
Select one:

a.
Series

b.
Shunt

c.
Compound

d.
Separately excited

e.
Self excited

Answer 110

b.
Shunt

Question 111

A2C14Q02 The function of the __________ committee is to initiate and assist in the development of health and safety expectations and safe systems of work.
Select one:

a.
Supervisory

b.
Safety

c.
Executive

d.
Medical

Answer 111

b.
Safety

Question 112

Excitation of the shunt field is controlled by a:
Select one:

a.
Regulating rheostat

b.
Mechanical governor

c.
Converter

d.
Long shunt

e.
Short shunt

Answer 112

a.
Regulating rheostat

Question 113

The phenomenon of water hammer in pipe lines is caused by which of the following?
1. Rapid opening of valves
2. Rapid condensation of a pocket of steam
3. Rapid closing of valves
4. Sudden stopping of a motor-driven centrifugal pump
5. Rapid opening of the check valve
Select one:

a.
1, 2, 3, 4

b.
2, 3, 4

c.
3, 4, 5

d.
1, 2, 3

e.
2, 4, 5

Answer 113

a.
1, 2, 3, 4

Question 114

The orifice plate has the advantage over other types of metering restrictions because it:
Select one:

a.
Produces less permanent pressure drop

b.
Handles 60% more flow

c.
Is easy to install and replace

d.
More efficient than the other types

e.
Is permanently attached to the piping

Answer 114

c.
Is easy to install and replace

Question 115

A2C13Q45 _________________ are continuously variable signals that control final control elements over the range of their operating positions.
Select one:

a.
Discrete outputs

b.
Analog outputs

c.
Discrete inputs

d.
Analog inputs

Answer 115

b.
Analog outputs

Question 116

A three-phase generator has a terminal voltage of 600 V and delivers full-load current of 200 A per terminal at a lagging power factor of 80%. Find the full-load real power in kilowatts.
Select one:

a.
166.27 kW

b.
186.84 kW

c.
192.88 kW

d.
200.78 kW

e.
220.85 kW

Answer 116

a.
166.27 kW

Question 117

A2C13Q06 Analog to digital converters change the analog signals sent by the ___________ to digital signals used by the ____________.
Select one:

a.
Controllers, field devices

b.
Final control elements, controllers

c.
Computer, field transmitters

d.
Field transmitters, controllers

Answer 117

d.
Field transmitters, controllers

Question 118

A2C02Q09 In Section I, PG-27, what is the weld joint strength reduction factor for carbon steel?
Select one:

a.
0.4

b.
0

c.
50%

d.
1

Answer 118

d.
1

Question 119

A2C03Q12 Selective catalytic reduction (SCR), a highly efficient removal of NOx, is achieved through reaction with __________ in the presence of a catalyst.
Select one:

a.
Urea

b.
Nitrous oxide

c.
Liquid nitrogen

d.
Ammonia

Answer 119

d.
Ammonia

Question 120

The air gaps between the poles and the armature in a DC generator are:
Select one:

a.
Filled with insulation

b.
Subject to sparking

c.
Increased with speed

d.
Kept comparatively small

e.
To insulate the poles from the armature

Answer 120

d.
Kept comparatively small

Question 121

The conventional globe valve is fairly _____ and popular in low-pressure service where severe _____ is not required.
Select one:

a.
Large, wear

b.
Small, space

c.
Expensive, temperature

d.
Reasonable, costs

e.
Cheap, throttling

Answer 121

e.
Cheap, throttling

Question 122

A2C03Q01 An important principle of __________ is that equations must balance. This means that the number of atoms of each element must balance between the reactants and the products.
Select one:

a.
Mathematical modeling

b.
Analytical chemistry

c.
Chemical bonding

d.
Stoichiometry

Answer 122

d.
Stoichiometry

Question 123

An ordinary refined natural gas would typically contain a percentage of methane greater than or equal to:
Select one:

a.
100%

b.
95%

c.
80%

d.
75%

e.
60%

Answer 123

b.
95%

Question 124

Centrifugal type steam separators have _____ sets of baffles:
Select one:

a.
2

b.
4

c.
1

d.
3

e.
5

Answer 124

a.
2

Question 125

Anthracite coal has a fixed carbon content of at least:
Select one:

a.
80%

b.
60%

c.
92%

d.
88%

e.
75%

Answer 125

c.
92%

Question 126

A2C13Q57 PLC programs can be made easier to read, understand, and troubleshoot when programmed using which of the following?
Select one:

a.
Sequential function charts

b.
Ladder diagrams

c.
Function block diagrams

d.
Structured text

Answer 126

c.
Function block diagrams

Question 127

In the formula for work, W = EIT, the W equals:
Select one:

a.
Watts

b.
Watt seconds

c.
Watt minutes

d.
Watt hours

e.
Watt joules

Answer 127

b.
Watt seconds

Question 128

Incidents can be divided into what two categories?
Select one:

A.
Critical, serious

B.
Near miss event, accidents

C.
Class A, class B

D.
Minor, major

E.
Incidental, accidental

Answer 128

B.
Near miss event, accidents

Question 129

A2C13Q39 How can the AND function be illustrated?
Select one:

a.
By a normally closed switch

b.
By a switch and a relay

c.
By switches in parallel

d.
By switches in series

Answer 129

c.
By switches in series

Question 130

A2C10Q05 A sine wave or sinusoid is a mathematical curve that describes a smooth periodic oscillation and is used to represent cycles of direct current per given time in seconds.
Select one:

a.
True

b.
False

Answer 130

b.
False

Question 131

The power used by an electric heater drawing 5 amps at 110 volts is:
Select one:

a.
22 watts

b.
55 watts

c.
550 watts

d.
550 kilowatts

e.
550 megawatts

Answer 131

c.
550 watts

Question 132

The plug-type globe valve is the best of the three types for _____ and _____ service.
Select one:

a.
Cost, maintenance

b.
Temperature, severe

c.
Size, hot

d.
Strength, wide

e.
Throttling, severe

Answer 132

e.
Throttling, severe

Question 133

A2C03Q05 A sample of coal has the following analysis by mass: carbon 80%, hydrogen 8%, sulfur 3%, oxygen 4%, and ash 5%. Calculate the higher heating value of the fuel using Dulong’s formula.
Select one:

a.
39.5 kJ/kg of fuel

b.
38.0 MJ/kg of fuel

c.
39.5 MJ/kg of fuel

d.
38.0 kJ/kg of fuel

Answer 133

b.
38.0 MJ/kg of fuel

Question 134

The advantages of diaphragm valves include:
The diaphragm separates the fluid from the actuator.
No valve packing is required.
They are useful with corrosive fluids.
There are no restrictions on fluid temperature.
Select one:

a.
1, 2, 3

b.
1, 2, 3, 4

c.
1, 3, 4

d.
3, 4

e.
2, 3, 4

Answer 134

a.
1, 2, 3

Question 135

The amount of NOX formed can be controlled by _____ the amount of excess air used and _____ the temperature in the combustion zone.
Select one:

A.
Increasing, increasing

B.
Restricting, increasing

C.
Increasing, reducing

D.
Eliminating, increasing

E.
Restricting, reducing

Answer 135

E.
Restricting, reducing

Question 136

With a mixing valve, if the plug is fully down:
Select one:

A.
The bottom inlet is open.

B.
The top inlet flow is closed.

C.
The bottom inlet is closed.

D.
The side outlet is closed.

E.
Both the top and bottom inlets are open.

Answer 136

C.
The bottom inlet is closed.

Question 137

An electric kettle is rated at 1500 W at 120 volts. The resistance would be:
Select one:

a.
9.6 ohms

b.
12.5 ohms

c.
24 ohms

d.
96 ohms

e.
180 ohms

Answer 137

a.
9.6 ohms

Question 138

A material suitable for use as insulation should have which of the following characteristics?
Select one:

a.
Transmits heat poorly

b.
Transmits heat readily

c.
Has no k value

d.
Has a small number of microscopic air pockets

e.
Eliminates heat loss

Answer 138

a.
Transmits heat poorly

Question 139

A2C13Q30 What are panel-mounted alarm annunciators best used for?
Select one:

a.
Critical alarms

b.
False alarms

c.
Minor alarms

d.
First out alarms

Answer 139

a.
Critical alarms

Question 140

The three methods of welded pipe manufacture are which of the following?
1. Piercing and rolling
2. Electric fusion
3. Double submerged arc
4. Cupping and drawing
5. Electric resistance
6. Extrusion
Select one:

a.
1, 3, 6

b.
2, 3, 5

c.
3, 4, 6

d.
2, 3, 4

e.
1, 2, 5

Answer 140

b.
2, 3, 5

Question 141

A2C13Q31 Which of the following statements is true?
Select one:

a.
Digital logic uses numbers to the base 10

b.
Digital logic can only be triggered by discrete (two position) inputs

c.
Digital logic is based on hexadecimal numerical processing

d.
Digital logic signals can be triggered by analog signals

Answer 141

d.
Digital logic signals can be triggered by analog signals

Question 142

Auto-transformer starting is:
Select one:

a.
A type of starting used only on automobiles

b.
A method that connects a motor to a higher voltage tap

c.
Not used much because of poor starting torque

d.
Expensive method but capable of giving better starting torque

e.
Are used for starting AC generators

Answer 142

d.
Expensive method but capable of giving better starting torque

Question 143

Examples of Class A hazards include which of the following?
1. Working without proper lighting.
2. Working in an excavation that is improperly shored or cut back.
3. Working in a confined space without proper protective equipment, or using proper procedures.
4. Working without a fall protection when required.
Select one:

A.
1, 2

B.
1, 2, 3

C.
1, 3, 4

D.
2, 3, 4

E.
1, 2, 3, 4

Answer 143

D.
2, 3, 4

Question 144

A2C13Q43 Which is not part of a PLC?
Select one:

a.
A power supply

b.
A microprocessor

c.
A data highway

d.
Input/output cards

Answer 144

c.
A data highway

Question 145

A2C14Q08 Notification lists and charts must be __________, and they must be exercised and tested following completion to ensure their effectiveness.
Select one:

a.
Processed

b.
Submitted

c.
Digital

d.
Site specific

Answer 145

d.
Site specific

Question 146

A2C13Q38 How many rows does the truth table for a NOT gate have?
Select one:

a.
3

b.
2

c.
1

d.
4

Answer 146

b.
2

Question 147

A2C02Q16 A head dished to a segment of a sphere has a thickness of 18 mm and a flanged-in manhole with diameter 180 mm. By how much must the thickness be increased?
Select one:

a.
2.8 mm

b.
3 mm

c.
2.7 mm

d.
3.6 mm

Answer 147

b.
3 mm

Question 148

In a venturi tube, the lowest pressure is found:
Select one:

a.
Three pipe diameters before the inlet

b.
In the outlet or divergent section

c.
In the inlet just before the converging section

d.
Three pipe diameters after the exit of the meter

e.
In the throat section

Answer 148

e.
In the throat section

Question 149

RMS current is 35 amps. The peak-to-peak value will be:
Select one:

a.
9.9 amps

b.
24.75 amps

c.
49.5 amps

d.
70 amps

e.
99 amps

Answer 149

e.
99 amps

Question 150

Emergency shutdown (ESD) devices are operated by:
1. Air
2. Hydraulics
3. Solar energy
4. Nitrogen
5. Electricity
6. Natural gas
Select one:

a.
1, 2, 3

b.
3, 4, 5

c.
2, 3, 6

d.
3, 5, 6

e.
1, 2, 5

Answer 150

e.
1, 2, 5