A2 Comprehensive Review 2

Question 1

If the resistance of a circuit is decreased to 1/4 of its original value, what happens to the current if the supply voltage is unchanged?
Select one:

a.
Current is 1/4 of original.

b.
Current is the same.

c.
Current is 1/2 of original.

d.
Current is 4 times original.

e.
Current is 2 times original.

Answer 1

d.
Current is 4 times original.

Question 2

There are two possible methods of connecting up three-phase generator windings. These are known as the _____ and the _____ connections.
Select one:

a.
Advanced, simple

b.
Star, delta

c.
Temporary, permanent

d.
Tight, loose

e.
Pie, omega

Answer 2

b.
Star, delta

Question 3

The stator of the induction motor is identical to that of the:
Select one:

a.
Three-phase alternator

b.
DC alternator

c.
Single-phase alternator

d.
DC generator

e.
Squirrel cage motor

Answer 3

a.
Three-phase alternator

Question 4

A2C15Q08 When supplied with a foam solution, sprinkler system piping grids that are equipped with foam-water nozzles generate air-foam in essentially the same sprinkler pattern as when water is discharged from the same nozzle. This dual capability affords the system with __________ extinguishment ability.
Select one:

a.
Class A and B

b.
Class B and C

c.
Class A and C

d.
Class C and D

Answer 4

a.
Class A and B

Question 5

Fire protection of a large outdoor fuel tank requires that several foam makers be installed slightly below the _____ of the tank.
Select one:

a.
Bottom

b.
Middle manway

c.
Top rim

d.
Centre

e.
Normal liquid level

Answer 5

c.
Top rim

Question 6

When fighting a fire with a standpipe system, why are the connections on the floor below the fire frequently used?
1. This allows the use of the connections on the fire floor as well.
2. The fire is approached from below rather than above.
3. They are larger connections.
4. It is easier to go up than down.
Select one:

a.
1, 4

b.
2, 3

c.
3, 4

d.
1, 2

e.
1, 2, 3, 4

Answer 6

d.
1, 2

Question 7

A T-shaped channel can be found in some _____ valves.
Select one:

a.
Gate

b.
Globe

c.
Ball

d.
Butterfly

e.
Multiport plug

Answer 7

e.
Multiport plug

Question 8

What is the most positive method to test a trap to ensure it is working?
Select one:

a.
Touch the body of the trap

b.
Observe the discharge by means of a test valve

c.
Check the temperatures of the inlet and outlet

d.
Remove the trap for bench testing

e.
Replace the trap with a new one

Answer 8

b.
Observe the discharge by means of a test valve

Question 9

A2C02Q10 Determine the maximum allowable stress for a boiler tube with material SA-209-T1 and a temperature 425°C.
Select one:

a.
103 MPa

b.
113 MPa

c.
110 MPa

d.
106 MPa

Answer 9

a.
103 MPa

Question 10

The combustibles in fuel are:
1. Hydrocarbons
2. Carbon
3. Nitrogen
4. Sulfur
5. Hydrogen
Select one:

a.
1, 2, 3, 4

b.
1, 2, 4, 5

c.
3, 4, 5

d.
2, 4, 5

e.
1, 2, 3, 4, 5

Answer 10

b.
1, 2, 4, 5

Question 11

Pipe size up to and including 300 mm is expressed as nominal______________:
Select one:

a.
Circumference

b.
Inside diameter

c.
Outside diameter

d.
Thickness of the wall

e.
Mass in kilograms per metre

Answer 11

b.
Inside diameter

Question 12

Inductive reactance opposes:
Select one:

a.
Resistance

b.
Current flow

c.
Capacitance

d.
Voltage

e.
Conductance

Answer 12

b.
Current flow

Question 13

Clear definitions for terms and equipment that relate to refrigeration and air conditioning equipment are defined in the _____________.
Select one:

a.
CSA-B51

b.
CSA-B52

c.
ASME BPVC, Section I

d.
ASME BPVC, Section VII

e.
NFPA-1001

Answer 13

b.
CSA-B52

Question 14

Bimetallic thermometers consist of two thin metal strips bonded together. The metal strips must have:
Select one:

a.
A difference in coefficient of elongation

b.
A difference in coefficient of expansion

c.
No difference in coefficient of expansion

d.
Equal coefficients of linear expansion

e.
Equal coefficients of volumetric expansion

Answer 14

b.
A difference in coefficient of expansion

Question 15

Diaphragm valves have three basic parts: the valve _____, the valve _____ assembly, and the flexible disc or _____.
Select one:

a.
Actuator, stem, body

b.
Body, bonnet, diaphragm

c.
Body, seat, packing

d.
Inlet, outlet, seat

e.
Top, bottom, partition

Answer 15

b.
Body, bonnet, diaphragm

Question 16

A2C13Q14 With SCADA, field devices _______________.
Select one:

a.
Must be digital

b.
Can only use wireless communication protocols

c.
Can use wired or wireless networks

d.
Must be analog

Answer 16

c.
Can use wired or wireless networks

Question 17

Combination locks _____ be used for lockout.
Select one:

A.
Could

B.
Must not

C.
May, in certain locations

D.
Are recommended to

E.
Must

Answer 17

B.
Must not

Question 18

Which of the following main devices are used as final control elements?
1. Control valves
2. Variable speed motor drives
3. Steam flow
4. Speed governors
5. Level switches
6. Damper positioners
Select one:

A.
1, 6

B.
1, 2, 6

C.
4, 5, 6

D.
1, 2, 4, 6

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

Answer 18

B.
1, 2, 6

Question 19

In a thermostatic trap, the bellows are usually filled with:
Select one:

a.
Mercury

b.
Water

c.
Alcohol

d.
Carbon dioxide

e.
Helium

Answer 19

c.
Alcohol

Question 20

A2C05Q01 Which type of steam separator is the simplest in design and has the lowest efficiency?
Select one:

a.
Mechanical coalescing separator

b.
Baffle-type separator

c.
Coalescing separator

d.
Centrifugal separator

Answer 20

b.
Baffle-type separator

Question 21

Digital computer systems use a binary number system of:
Select one:

A.
Zeros and tens

B.
Ones and zeros

C.
Tens and one hundreds

D.
Ones and one hundreds

E.
Zero and one hundred percentages

Answer 21

B.
Ones and zeros

Question 22

If the theoretical amount of air required for the complete combustion of 1 kg of a coal is 10 kg, and the actual amount of air used in the furnace is 12 kg per kg of coal, then the excess air equals:
Select one:

a.
10%

b.
2%

c.
20%

d.
12%

e.
22%

Answer 22

c.
20%

Question 23

The synchronous motor is:
Select one:

a.
Self-starting

b.
Not self-starting

c.
Used to create a lagging power factor

d.
A split phase type motor

e.
Used to decrease the power factor

Answer 23

b.
Not self-starting

Question 24

The three types of gate design include:
Select one:

a.
Flexible, full, split

b.
Solid, flexible, split

c.
Solid, flexible, hinged

d.
Solid, movable, split

e.
Solid, full, split

Answer 24

b.
Solid, flexible, split

Question 25

A2C13Q21 On the graphic display of an operator interface unit, which colour is typically used in the power generation industry to indicate a motor that is running?
Select one:

a.
Green

b.
Yellow

c.
Blinking

d.
Red

Answer 25

d.
Red

Question 26

An absolute pressure gauge uses a/an _____ to sense the pressure.
Select one:

a.
Diaphragm under vacuum

b.
Bellows under vacuum

c.
Bourdon tube under vacuum

d.
Spiral Bourdon tube under vacuum

e.
Orifice plate

Answer 26

b.
Bellows under vacuum

Question 27

A resistor has a maximum loading current of 2 amps and a power rating of 1.5 watts. The resistance is:
Select one:

a.
375 milliohms

b.
0.75 ohms

c.
3 ohms

d.
7.5 ohms

e.
75 milliohms

Answer 27

a.
375 milliohms

Question 28

PLCs retrieve data from a process, and perform which action based on the data?
Select one:

a.
Generate a control signal

b.
Store the data in memory

c.
Provide for operator interface

d.
Display the data on a CRT

e.
Print the data

Answer 28

a.
Generate a control signal

Question 29

A person should consider all electrical circuits to be alive unless certain that they are _____ and cannot, by some human error, be made _____.
Select one:

A.
Isolated, connected

B.
Dead, live

C.
Not, open

D.
220 V, 110 V

E.
Live, dead

Answer 29

B.
Dead, live

Question 30

Each worker who works on machinery or equipment requiring lockout is responsible for which of the following?
1. Locking out the energy isolating devices before starting work, except as provided in group lockout procedures.
2. Removing personal locks on the completion of their work.
3. Maintaining immediate control of the key(s) to personal locks throughout the duration of the work.
Select one:

A.
1, 2

B.
1, 3

C.
3

D.
2, 3

E.
1, 2, 3

Answer 30

E.
1, 2, 3

Question 31

The advantages of using natural gas as a boiler fuel include which of the following?
1. Clean burning; no ash is produced
2. Cost of the fuel
3. Easily mixed with air
4. Requires large diameter transmission lines
5. Does not require extensive handling equipment
Select one:

a.
1, 2, 3

b.
2, 3, 4

c.
3, 4, 5

d.
1, 3, 5

e.
1, 2, 4

Answer 31

d.
1, 3, 5

Question 32

A2C01Q01 What is another name for a boiler and pressure vessel regulatory authority?
Select one:

a.
Jurisdictional authority

b.
Safety branch

c.
Regulatory authority

d.
Safety department

Answer 32

a.
Jurisdictional authority

Question 33

When a pipe is used to convey liquids or gases at high temperature and pressure, what kind of welded pipe flange must be used?
Select one:

a.
Socket welded flange

b.
Slip-on welded flange

c.
Lap joint flange

d.
Weld neck flange

e.
Tongue and groove flange

Answer 33

d.
Weld neck flange

Question 34

What is the peak-to-peak value of an alternating current if the RMS value is 12 A?
Select one:

a.
15.75 A

b.
20.25 A

c.
16.97 A

d.
25.68 A

e.
33.94 A

Answer 34

e.
33.94 A

Question 35

Dry pipe systems are found in environments where the temperature is maintained below_____________.
Select one:

a.
–2°C

b.
0°C

c.
2°C

d.
4°C

e.
5°C

Answer 35

d.
4°C

Question 36

In a purely capacitive AC circuit, the current:
Select one:

A.
Leads the voltage by 90 degrees

B.
Is out of phase by 45 degrees

C.
Can lead or lag voltage

D.
Lags voltage by 90 degrees

E.
Is in phase with voltage

Answer 36

A.
Leads the voltage by 90 degrees

Question 37

Where are strainers installed in steam lines?
Select one:

a.
Downstream of separators

b.
To reduce steam temperature

c.
To remove moisture

d.
To prevent water hammer

e.
Before steam traps

Answer 37

e.
Before steam traps

Question 38

A2C01Q15 According to CSA-B51, when the top connection of a water gauge is more than 2 m and less than 6 m from the floor or working platform of a boiler room, what must it be fitted with?
Select one:

a.
Bars and beams

b.
A relief valve

c.
A ladder

d.
Rods or chains

Answer 38

d.
Rods or chains

Question 39

What is the acronym for The National Board of Boiler and Pressure Vessel Inspectors?
Select one:

A.
CSA

B.
ASME

C.
NBA

D.
NBBI

E.
HSN

Answer 39

D.
NBBI

Question 40

Fluid friction loss and _____ drop are inherent losses that are responsible for a major portion of the total energy loss in many fluid-handling systems.
Select one:

a.
Pressure

b.
Temperature

c.
Flow

d.
Viscosity

e.
Volume

Answer 40

a.
Pressure

Question 41

A2C13Q15 RTUs are ________________.
Select one:

a.
Restricted telemetry units

b.
Remote terminal units

c.
Remote telephone users

d.
Located in central control rooms

Answer 41

b.
Remote terminal units

Question 42

When a high starting torque is required, but the running load may be small, the best DC motor to use would be the _____ motor.
Select one:

a.
Series

b.
Shunt

c.
Compound

d.
Under compounded

e.
Over compounded

Answer 42

c.
Compound

Question 43

If a dead generator is accidentally energized, while on turning gear, it will start and behave as a/an:
Select one:

A.
AC generator

B.
DC generator

C.
Prime mover

D.
DC motor

E.
Induction motor

Answer 43

E.
Induction motor

Question 44

Three-phase systems often use banks of _____ transformers to replace three-phase transformers.
Select one:

a.
Double-phase

b.
Single-phase

c.
Step-down

d.
Step-up

e.
Auto-

Answer 44

b.
Single-phase

Question 45

A2C03Q10 Flue gas constituents are most often listed by volume percentage. Smaller concentrations are listed in parts per million (ppm). To change between units, the conversion factor is 1% by volume = __________ ppm.
Select one:

a.
1000

b.
10

c.
10 000

d.
100

Answer 45

c.
10 000

Question 46

A2C02Q15 Using Section I, PG-27, determine the weld joint strength reduction factor w for carbon-molybdenum steel pipe operating at 427°C.
Select one:

a.
0.95

b.
0.83

c.
0.86

d.
1

Answer 46

d.
1

Question 47

In a generator, the direction of the induced EMF can be determined by applying Fleming’s _____ hand rule.
Select one:

a.
Back

b.
Two

c.
Inverse

d.
Left

e.
Right

Answer 47

e.
Right

Question 48

The two process conditions that can make the overall effectiveness of feedback control unsatisfactory are:
1. Closed system
2. Open system
3. Large disturbances
4. Large amounts of lag
Select one:

a.
1, 2

b.
2, 3

c.
3, 4

d.
1, 3

e.
2, 4

Answer 48

c.
3, 4

Question 49

Plug valves consist of a tapered or straight vertical cylinder _____ into a valve body.
Select one:

a.
Welded

b.
Threaded

c.
Pressed

d.
Inserted

e.
Shrunk

Answer 49

d.
Inserted

Question 50

A2C15Q10 _________ fires occur in the vapour-air mixture over the surface of flammable liquids such as greases, gasoline, and lubricating oils.
Select one:

a.
Class D

b.
Class B

c.
Class A

d.
Class C

Answer 50

b.
Class B

Question 51

Which type of welded flange is used for high-pressure and extreme temperature service?
Select one:

a.
Tongue and groove flange

b.
Socket welded flange

c.
Slip-on welded flange

d.
Lap joint flange

e.
Weld neck flange

Answer 51

e.
Weld neck flange

Question 52

The viscosity is the time, in _____, for 60 cm³ of oil to run through a standard size orifice, at 38°C.
Select one:

a.
Nanoseconds

b.
Seconds

c.
Minutes

d.
Hours

e.
Days

Answer 52

b.
Seconds

Question 53

The measuring instrument used with a Wheatstone bridge circuit is:
Select one:

a.
Megger

b.
Galvanometer

c.
Ohm-meter

d.
Ammeter

e.
Voltmeter

Answer 53

b.
Galvanometer

Question 54

A2C01Q13 Which of these items is not required as part of a boiler stamping?
Select one:

a.
Year of manufacture

b.
Boiler dimensions

c.
Maximum allowable working pressure

d.
Manufacturer’s serial number

Answer 54

b.
Boiler dimensions

Question 55

Water hammer may occur in which of the following lines?
1. Steam
2. Water
3. Air
4. Oil
Select one:

a.
1, 2, 3

b.
2, 3, 4

c.
1, 3, 4

d.
1, 2, 4

e.
1, 2

Answer 55

d.
1, 2, 4

Question 56

A2C13Q37 A pump runs if nobody pushes a stop button. What is the binary logic for this example?
Select one:

a.
AND

b.
OR

c.
IF

d.
NOT

Answer 56

d.
NOT

Question 57

A2C05Q07 When warming up a steam header, when may the main header isolation valve be cracked open?
Select one:

a.
After the bypass is fully opened and there is no pressure rise in the steam header

b.
At the same time as the bypass is opened

c.
Once all traps are proven to be working properly

d.
After steam flow is established

Answer 57

a.
After the bypass is fully opened and there is no pressure rise in the steam header

Question 58

A2C10Q10 There are two possible methods of connecting three-phase generator windings. These are known as the __________ and the __________ connections.
Select one:

a.
Star (wye), alpha

b.
Rotary, delta

c.
Star (wye), delta

d.
Beta, stationary

Answer 58

c.
Star (wye), delta

Question 59

A2C02Q13 Using Section I, PG-27, determine the weld joint strength reduction factor w for Cr-Mo steel pipe operating at 454°C.
Select one:

a.
1

b.
0.86

c.
0.83

d.
0.95

Answer 59

d.
0.95

Question 60

A 3-ohm resistor has a power rating of 1.5 watts. The maximum loading is:
Select one:

a.
0.05 amps

b.
0.707 amps

c.
4.5 amps

d.
20 amps

e.
22 amps

Answer 60

b.
0.707 amps

Question 61

Since the flux of a shunt motor remains constant, its torque is:
Select one:

a.
Inversely proportional to armature current

b.
Proportional to armature current

c.
Increased

d.
Decreased

e.
Unchanged

Answer 61

b.
Proportional to armature current

Question 62

The percent of the process variable range that causes _____ change in controller output is often called the proportional band.
Select one:

a.
20%

b.
25%

c.
50%

d.
75%

e.
100%

Answer 62

e.
100%

Question 63

Calculate the minimum thickness required for a welded steel pipe of material SA-209, grade T1b, and plain end. The outside diameter of the pipe is 273.05 mm, the operating pressure is 2000 kPa, and the temperature is 400°C. Use S = 98.5.
Select one:

a.
7.25 mm

b.
3.04 mm

c.
2.75 mm

d.
5.69 mm

e.
8.57 mm

Answer 63

c.
2.75 mm

Question 64

A2C07Q06 The symbol for flux density is _____ and the symbol for magnetic flux is ______.
Select one:

a.
B, ɸ

b.
ɸ, μ

c.
ɸ, B

d.
μ, B

Answer 64

a.
B, ɸ

Question 65

Glass fibre may be used for pipe insulation up to a temperature of:
Select one:

a.
454°C

b.
595°C

c.
150°C

d.
185°C

e.
212°C

Answer 65

a.
454°C

Question 66

A2C03Q09 What are the two main constituents in biogas?
Select one:

a.
Methane and hydrogen

b.
Hydrogen and carbon monoxide

c.
Methane and hydrogen sulfide

d.
Methane and carbon dioxide

Answer 66

d.
Methane and carbon dioxide

Question 67

A steam header between the boiler and first stop valve is to be fabricated of 152.4 mm NPS pipe. The material specification is SA-369 FPA seamless pipe. The operating pressure will be 8440 kPa at 420°C. The pipe will be joined by full penetration welds and will be fully radiographed. Calculate the minimum thickness of the pipe wall if the manufacturer’s tolerance is 12.5% and S = 63 MPa.
Select one:

a.
13.1 mm

b.
15.3 mm

c.
25.3 mm

d.
10.8 mm

e.
12.4 mm

Answer 67

e.
12.4 mm

Question 68

Standpipe systems are used in buildings over _____ in height, since that is the practical limit for firefighters to couple hose together from the pump truck at street level up the stairways to the fire floor.
Select one:

a.
2 stories (12 m)

b.
3 stories (14 m)

c.
5 stories (25 m)

d.
10 stories (50 m)

e.
15 stories (75 m)

Answer 68

b.
3 stories (14 m)

Question 69

To accommodate expansion on pipe racks with long runs of pipe, the _____ is/are used.
Select one:

a.
Expansion bend

b.
Expansion joint

c.
Solid anchor

d.
Different metals

e.
Temperature gradients

Answer 69

a.
Expansion bend

Question 70

Which of these tasks should be done during a yearly trap inspection?
1. The trap body and operating parts should be examined for corrosion, erosion, mechanical wear, etc.
2. All internal parts should be cleaned and worn valves, seats, levers etc. should be replaced, as should cracked buckets, floats, or bellows.
3. Check trap housing temperature.
4. All gasket seating surfaces should be thoroughly cleaned and new gaskets used on reassembly.
Select one:

a.
1, 2, 3, 4

b.
1, 2

c.
1, 2, 4

d.
1, 2, 3

e.
2, 3, 4

Answer 70

c.
1, 2, 4

Question 71

Electric cost is 10 cents per kWh. Resistance is 10 ohms at 110 volts. Time is 2 hours. The cost is:
Select one:

a.
11 cents

b.
12.1 cents

c.
22 cents

d.
24.2 cents

e.
26.2 cents

Answer 71

d.
24.2 cents

Question 72

The four basic parts of an RTU include which of the following?
1. Microprocessor
2. Memory
3. Master terminal unit
4. Input/output terminals
5. Data highway
6. Power supply
Select one:

a.
2, 3, 4, 6

b.
1, 3, 4, 5

c.
1, 2, 4, 6

d.
2, 3, 4, 5

e.
3, 4, 5, 6

Answer 72

c.
1, 2, 4, 6

Question 73

A2C10Q06 If an alternating current is said to have a frequency of 60 Hz, it indicates that its waveform repeats _____ times in one second.
Select one:

a.
60

b.
6

c.
600

d.
0.6

Answer 73

a.
60

Question 74

In on-off control, the controller signal to the final control element is either _____ positive or _____ negative.
Select one:

a.
0%, 100%

b.
0%, 50%

c.
50%, 100%

d.
100%, 50%

e.
100%, 100%

Answer 74

e.
100%, 100%

Question 75

A seamless, welded, full-hemispherical head is welded to a boiler shell that has an inside diameter of 1100 mm. Maximum working pressure is 3500 kPa, the material is SA-226, and operating temperature is 300°C. The head has a flanged in manhole that meets code requirements. Calculate the minimum required thickness for the head. Use S = 81 MPa.
Select one:

a.
45.55 mm

b.
60.55 mm

c.
22 mm

d.
52.87 mm

e.
40.22 mm

Answer 75

a.
45.55 mm

Question 76

A2C10Q07 The largest instantaneous value in a positive or negative direction is the amplitude or the average value of the alternating current.
Select one:

a.
True

b.
False

Answer 76

b.
False

Question 77

A2C13Q25 What happens when a HI-HI or LO-LO alarm causes a trip?
Select one:

a.
The control system begins a controlled, fully automatic, sequential shutdown

b.
The operator must manually shut down all process equipment in the correct order

c.
The operator must hit the emergency stop button to stop the process

d.
The affected process equipment immediately stops

Answer 77

a.
The control system begins a controlled, fully automatic, sequential shutdown

Question 78

The frequency of a wave with a period of 3 microseconds is:
Select one:

a.
333.33 Hz

b.
600 Hz

c.
333.33 kHz

d.
33.33 MHz

e.
6000 Hz

Answer 78

c.
333.33 kHz

Question 79

If a/an _____ generator loses excitation, the rotor accelerates and it operates as an induction generator, running above _____ speed.
Select one:

a.
Three-phase, rated

b.
Synchronous, synchronous

c.
AC, governor

d.
DC, generator

e.
AC, synchronous

Answer 79

b.
Synchronous, synchronous

Question 80

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

a.
Coal pile

b.
Electrical panel

c.
Pile of paper

d.
Oil tank

e.
Lumber pile

Answer 80

d.
Oil tank

Question 81

A simple controller station allows the operator to do which of the following?
1. View and change the setpoint.
2. View feed forward settings.
3. View the process variable.
4. Switch from auto to manual.
5. View process history.
Select one:

A.
1, 2

B.
2, 3, 5

C.
1, 3, 4

D.
1, 2, 3, 4

E.
1, 2, 3, 4, 5

Answer 81

C.
1, 3, 4

Question 82

If an AC voltage is applied to a circuit, it will produce an AC current flow. If the voltage and the current reach their maximum values at the same time, they are said to be:
Select one:

a.
Out of phase

b.
In phase

c.
AC current

d.
DC current

e.
Three phase

Answer 82

b.
In phase

Question 83

When a fire pump system is installed, what are the minimum requirements that must be followed?
Select one:

a.
Insurance underwriters’ recommendations

b.
Local fire marshall’s recommendations

c.
NFPA Standard 20

d.
Company’s policy to protect equipment and employees

e.
The advice of the engineer who is designed the system

Answer 83

c.
NFPA Standard 20

Question 84

A2C13Q41 Which of the following uses non-continuous (sequential) control?
Select one:

a.
Boiler firing rate control

b.
Demineralizer regeneration

c.
Turbine speed control

d.
Boiler water level control

Answer 84

b.
Demineralizer regeneration

Question 85

A2C01Q16 What does CSA-B51 say when a solid fuel boiler that is operating at a pressure over 103 kPa is provided with a fusible plug?
Select one:

a.
The plug must be designed as specified in the ASME Code

b.
The plug should be constructed of a non-eutectic alloy

c.
The plug must be removed daily

d.
The plug must be reinforced

Answer 85

a.
The plug must be designed as specified in the ASME Code

Question 86

Increasing the number of corrugations in a bellows type element:
Select one:

a.
Increases the travel of the bellows

b.
Decreases the travel of the bellows

c.
Reduces the pressure that bellows can be exposed to

d.
Increases the pressure that bellows can be exposed to

e.
Does not change the operation of the bellow

Answer 86

a.
Increases the travel of the bellows

Question 87

Bimetal thermometers are sometimes wound in the form of a helix to:
Select one:

a.
Increase the distance of the scale

b.
Decrease the temperature range

c.
Decrease the rotation of pointer

d.
Increase the accuracy of temperature reading

e.
Increase the range of the scale

Answer 87

d.
Increase the accuracy of temperature reading

Question 88

A2C03Q08 After raw natural gas and liquids have been processed in a plant, what is the main constituent in the natural gas product that is used to heat most of our homes?
Select one:

a.
Butane

b.
Methane

c.
Carbon monoxide

d.
Ethane

Answer 88

b.
Methane

Question 89

A2C01Q09 Which document is sent to the National Board to register a boiler or pressure vessel?
Select one:

a.
Inspection request

b.
Quality certificate

c.
Manufacturer’s data report

d.
Certificate of authorization

Answer 89

c.
Manufacturer’s data report

Question 90

A2C13Q24 What is a first out alarm?
Select one:

a.
The first alarm to clear when a system is brought back online

b.
The alarm that happens most often

c.
An alarm that triggers a sequence of other alarms

d.
A HI or LO alarm that happens before a process condition becomes HI-HI or LO-LO

Answer 90

c.
An alarm that triggers a sequence of other alarms

Question 91

A2C14Q09 An employer is required to ensure that a hazardous product has an updated __________ when it enters the workplace.
Select one:

a.
Chemical reference

b.
Contract

c.
Safety data sheet

d.
Container

Answer 91

c.
Safety data sheet

Question 92

Transformers are cooled by:
1. Spraying water over the coils

2. Placing the core in an oil-filled tank
3. Forced cooling, using fans
4. Using pyrene as a coolant

Select one:

A.
1, 2, 3

B.
1, 3, 4

C.
2, 3

D.
2, 3, 4

E.
1, 2, 3, 4

Answer 92

C.
2, 3

Question 93

Before commencing work on locked out equipment, a(n) _____ must verify that all energy sources are effectively locked out.
Select one:

A.
Operator

B.
Supervisor

C.
Worker

D.
Manager

E.
Clerk

Answer 93

C.
Worker

Question 94

A2C02Q12 Using Section I, PG-27, determine the temperature factor y for ferritic stainless steel pipe operating at 510°C.
Select one:

a.
0.6

b.
0.4

c.
0.7

d.
0.5

Answer 94

d.
0.5

Question 95

A fire extinguishing agent based on mixtures of ammonium phosphates and sulfates is referred to as _____________..
Select one:

a.
Mixed chemical

b.
Multi-purpose dry chemical

c.
Aqueous foam

d.
Red-B

e.
Purple-K

Answer 95

b.
Multi-purpose dry chemical

Question 96

A2C01Q10 Which National Board commission qualifies an individual to perform inspections on boilers and pressure vessels as required by the ASME Boiler and Pressure Vessel Code?
Select one:

a.
Authorized Inspector (AI)

b.
Senior Inspector Designation (SID)

c.
In-Service Inspector (ISI)

d.
Code Required Inspector (CRI)

Answer 96

a.
Authorized Inspector (AI)

Question 97

Generally, in a gate valve, the parts most severely worn are the:
Select one:

a.
Disc and seat

b.
Spindle and packing

c.
Gland and spindle

d.
Disc and packing

e.
Actuator and gland

Answer 97

a.
Disc and seat

Question 98

In a purely inductive AC circuit, the current:
Select one:

a.
Leads voltage by 90 degrees

b.
Is out of phase by 45 degrees

c.
Can lead or lag voltage

d.
Lags voltage by 90 degrees

e.
Is in phase with the voltage

Answer 98

d.
Lags voltage by 90 degrees

Question 99

A2C05Q08 Which insulation is used at temperatures above 815°C?
Select one:

a.
Refractory insulation

b.
Cryogenic insulation

c.
Thermal insulation

d.
High-temperature insulation

Answer 99

a.
Refractory insulation

Question 100

A2C02Q01 What is the name for steels with more than 12% chromium?
Select one:

a.
Mild steel

b.
Cast iron

c.
Tool steel

d.
Stainless steel

Answer 100

d.
Stainless steel

Question 101

Electrostatic precipitators have an efficiency of greater than:
Select one:

a.
75%

b.
80%

c.
85%

d.
90%

e.
95%

Answer 101

e.
95%

Question 102

Deluge systems are intended to deliver _____ quantities of water over a _____ area in a relatively ______ period of time.
Select one:

a.
Small, large, short

b.
Large, large, short

c.
Small, small, long

d.
Large, small, long

e.
Changing, large, long

Answer 102

b.
Large, large, short

Question 103

For average conditions, hydrants are normally placed about _____ from buildings.
Select one:

a.
10 m

b.
12 m

c.
15 m

d.
25 m

e.
30 m

Answer 103

b.
12 m

Question 104

Calculate the minimum required thickness (in mm) for a blank, un-stayed, full-hemispherical head with the pressure on the concave side. The head is fabricated from seamless material and is double butt welded to the shell. All reinforcement is removed and fully radiographed. The radius to which the head is dished is 700 mm, the maximum allowable working pressure is 4000 kPa, and the head material is SA-285 C. The head will not reach a temperature greater than 340°C. Use S = 94.7 MPa.
Select one:

A.
12.99 mm

B.
14.85 mm

C.
17.66 mm

D.
30 mm

E.
85.34 mm

Answer 104

B.
14.85 mm

Question 105

Flow rate is often measured with a(n):
Select one:

a.
Pedometer

b.
Ultrasonic meter

c.
Speedometer

d.
Velocity meter

e.
Orifice plate

Answer 105

e.
Orifice plate

Question 106

The amount of energy in kilowatt-hours used by a 700-watt block heater in 6 hours is:
Select one:

a.
4200 kWh

b.
175 kWh

c.
116.67 kWh

d.
42 kWh

e.
4.2 kWh

Answer 106

e.
4.2 kWh

Question 107

Feed forward control:
Select one:

a.
Sends outputs to demand loads

b.
Does not accept feedback

c.
Does not accept an operator set point

d.
Adjusts the manipulated variable in response to changes in demand load

e.
Is not facilitated by modern controllers

Answer 107

d.
Adjusts the manipulated variable in response to changes in demand load

Question 108

A _____ is an excavation that is less than 3.7 m wide at the bottom, over 1.2 m deep, and of any length.
Select one:

A.
Confined space

B.
Trough

C.
Channel

D.
Trench

E.
Ditch

Answer 108

D.
Trench

Question 109

Conducting regular team safety meetings is an effective way for the team to achieve a safer and more productive workplace. The team meets to do which of the following?
1. Share information and safety concerns.
2. Solve operational problems.
3. Discuss safety issues and find solutions.
4. Plan outdoor training sessions.
5. Build on communication.
6. Stimulate group discussion and interaction in regards to safety items.
Select one:

a.
1, 6

b.
1, 2, 3

c.
1, 2, 3, 4

d.
1, 3, 5, 6

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

Answer 109

d.
1, 3, 5, 6

Question 110

The exciter field voltage meter can be described as:
Select one:

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

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

c.
Giving an indication of the DC voltage that is being supplied to the generator’s field windings

d.
A measurement of the reactive power being generated by the AC generation system

e.
A measurement of the inductive power being generated by the AC generation system

Answer 110

c.
Giving an indication of the DC voltage that is being supplied to the generator’s field windings

Question 111

A2C10Q08 A circuit with inductive load is usually one containing a coil or coils, very often around a magnetic core. Select an example of an inductive load.
Select one:

a.
Transformer

b.
All of the above

c.
Generator

d.
Motor

Answer 111

b.
All of the above

Question 112

In a direct-operating, electrically operated valve:
Select one:

A.
An actuator is used in place of the plunger.

B.
The plunger is connected directly to the disc of a globe valve.

C.
The plug is energized, opening the valve.

D.
The solenoid is de-energized, thus opening the valve.

E.
The solenoid is energized, thus closing the valve.

Answer 112

B.
The plunger is connected directly to the disc of a globe valve.

Question 113

If carbon steel is used then the piping will be suitable for temperatures up to:
Select one:

a.
225°C

b.
635°C

c.
750°C

d.
545°C

e.
427°C

Answer 113

e.
427°C

Question 114

Calculate the minimum required wall thickness of a superheater tube. The tube is 100mm in OD and is connected to a header by strength welding. The maximum allowable working pressure is 2430 kPa gauge and the average tube temperature is 350°C. The tube material is alloy steel with specification SA-192. Use S = 81 MPa.
Select one:

a.
5.025 mm

b.
1.58 mm

c.
3.258 mm

d.
1.978 mm

e.
2.897 mm

Answer 114

d.
1.978 mm

Question 115

The most common frequency of AC generators in North America is:
Select one:

a.
40 hertz

b.
50 hertz

c.
60 hertz

d.
110 hertz

e.
120 hertz

Answer 115

c.
60 hertz

Question 116

In a balance plug design, upstream ___­­­­­________ acts on both the top and bottom of the valve plug, thereby __________ forces on the top and the bottom of the plug.

Select one:

A.
flow, equalizing

B.
temperature, equalizing

C.
pressure, equalizing

D.
pressure, increasing

E.
flow, reducing

Answer 116

C.
pressure, equalizing

Question 117

A2C01Q04 When requesting authorization from a jurisdiction to act as a repair shop, what must be approved or inspected?
Select one:

a.
The shop’s program documents

b.
The results of the shop’s latest ASME audit

c.
The shop’s database

d.
The shop’s quality control system

Answer 117

d.
The shop’s quality control system

Question 118

A2C01Q18 The pressure relief capacity of the safety valves must be such that they can discharge all the steam that can be generated by the boiler without allowing the pressure to rise more than 6% above the________________________________.
Select one:

a.
Indicated horsepower

b.
Maximum allowable working pressure

c.
Hydrostatic pressure

d.
Atmospheric pressure

Answer 118

b.
Maximum allowable working pressure

Question 119

The greatest instantaneous value of AC is:
Select one:

a.
Multitude

b.
Amplitude

c.
Two times the effective value

d.
Root-mean square

e.
Magnitude

Answer 119

b.
Amplitude

Question 120

What value would R3 have to be to balance the bridge shown?

10_11

Select one:

a.
300 Ω

b.
400 Ω

c.
450 Ω

d.
480 Ω

e.
540 Ω

Answer 120

d.
480 Ω

Question 121

A2C09Q01 Arc flash clothing is rated by an __________ (ATPV) or energy of break-open threshold (EBT).
Select one:

a.
Arc thermal protection value

b.
Arc thermal performance value

c.
Arc thermal performance variable

d.
Arc temperature performance variable

Answer 121

b.
Arc thermal performance value

Question 122

To measure the heat value of coal, the instrument used is a:
Select one:

a.
Anemograph

b.
Thermometer

c.
Hydrometer

d.
Calorimeter

e.
Compensator

Answer 122

d.
Calorimeter

Question 123

There are a few work permit types that are most commonly used. Identify the type that is not one of them.
Select one:

A.
Work clearance

B.
Hot work permits

C.
Cold work permits

D.
Confined space entry permits

E.
Demolition permits

Answer 123

E.
Demolition permits

Question 124

The diverter valve operation can be described as:
Select one:

a.
Moving the valve stem varies the proportion of liquid or gas entering each of the inlets. There is a continuous flow from the outlet regardless of the valve plug position.

b.
The inlet pressure acts equally on both valve plugs, reducing the force needed to move the valve stem. An unbalanced force will be produced if one discharge line has a higher pressure than the other discharge line.

c.
When the plug is fully down, the bottom inlet is shut off. When the plug is fully raised, the side inlet flow is shut off. Any intermediate position proportions the two inlet flows to meet the operating needs.

d.
The valve may maintain a constant level of fluid in a vessel. If the inlet flow is too high when the level is at the maximum, the excess input can be diverted to another vessel.

e.
Bringing two different flow streams together into one stream.

Answer 124

d.
The valve may maintain a constant level of fluid in a vessel. If the inlet flow is too high when the level is at the maximum, the excess input can be diverted to another vessel.

Question 125

A2C14Q10 Controlling the identified indirect cause of workplace accidents or incidents is normally a longer-term development process involving __________ measures and/or system changes.
Select one:

a.
Institutional

b.
Legal

c.
Preventive

d.
Reactive

Answer 125

c.
Preventive

Question 126

Which type of fuel requires the smallest amount of excess air?
Select one:

a.
Fuel oil

b.
Natural gas

c.
Pulverized fuel

d.
Wood

e.
Coal

Answer 126

b.
Natural gas

Question 127

The purpose of the voltage adjustment is to adjust the generator:
Select one:

a.
Output voltage

b.
Excitation voltage

c.
Output phase voltage

d.
Output current

e.
Excitation current

Answer 127

b.
Excitation voltage

Question 128

Wet pipe sprinkler systems are found in which of the following?
1. Office buildings
2. Stores
3. Manufacturing facilities
4. Hotels
5. Health care facilities
Select one:

a.
1, 2, 3

b.
2, 3, 4

c.
3, 4, 5

d.
1, 3, 5

e.
1, 2, 3, 4, 5

Answer 128

e.
1, 2, 3, 4, 5

Question 129

The two most common types of trenching used are _____ cut with shoring and _____ cut with proper slopes on the side to protect the workers in the trench.
Select one:

A.
Straight, open

B.
Stager, slope

C.
Shore, slope

D.
Bridge, open

E.
Straight, closed

Answer 129

A.
Straight, open

Question 130

A boiler drum is made of SA-515-70 steel with a thickness of 68.5 mm and a ligament efficiency of 0.66. If the steam temperature is 280°C and the inside diameter of the drum is 1.6 m, what will the MAWP be, in kPa? Use S = 136 MPa.
Select one:

a.
2500 kPa

b.
6500 kPa

c.
7310 kPa

d.
5200 kPa

e.
5800 kPa

Answer 130

c.
7310 kPa

Question 131

In valve selection, an examination of the fluid to be handled is made to determine its _____ and _____.
Select one:

a.
Mass, viscosity

b.
Properties, characteristics

c.
Texture, corrosiveness

d.
Colour, odour

e.
Flammability, combustibility.

Answer 131

b.
Properties, characteristics

Question 132

One way to detect freezing in a hydrant is:
Select one:

a.
Open the hydrant fully and listen for water

b.
Lower a weight on a stout string into the hydrant to see if it strikes ice or water

c.
Pressurize the hydrant with gas

d.
Strike the hydrant with a hammer and listen for the ringing sound

e.
Feel the temperature of the metal

Answer 132

b.
Lower a weight on a stout string into the hydrant to see if it strikes ice or water

Question 133

Which of the following traps is a thermodynamic type?
Select one:

a.
Impulse

b.
Bellows

c.
Ball float

d.
Inverted bucket

e.
F and T trap

Answer 133

a.
Impulse

Question 134

A DC circuit has 12 volts and a resistance of 300 ohms. What is the current flowing in the circuit?
Select one:

A.
0.4 amps

B.
40 milliamps

C.
400 milliamps

D.
3600 amps

E.
25 milliamps

Answer 134

B.
40 milliamps

Question 135

The diverting valve is a three-way valve, with _____ inlet and _____ outlets.
Select one:

a.
Two, one

b.
Small, large

c.
One, two

d.
One, three

e.
Three, one

Answer 135

c.
One, two

Question 136

A2C14Q05 If a large number of workers are working on machinery or equipment where a large number of energy isolating devices must be locked out, a __________ lockout procedure that meets the requirements of OH&S Legislation may be used.
Select one:

a.
Gang

b.
Substantial

c.
Group

d.
Cluster

Answer 136

c.
Group

Question 137

A2C05Q09 Which type of insulation is formed into soft masses to be applied to irregular surfaces?
Select one:

a.
Insulating cement

b.
Glass fibre

c.
Calcium silicate

d.
Elastomeric

Answer 137

a.
Insulating cement

Question 138

In an uninterruptible power supply system, the inverter converts the _____ (for critical plant power users) to maintain an output power supply with stable voltage and frequency.
Select one:

a.
DC power to single-phase AC

b.
DC power to three-phase AC

c.
AC power to single-phase DC

d.
AC power to three-phase DC

e.
Three-phase DC power to single-phase AC

Answer 138

a.
DC power to single-phase AC

Question 139

Interpoles carry _____ current.
Select one:

a.
Field

b.
Load

c.
Flux

d.
Armature

e.
Stator

Answer 139

d.
Armature

Question 140

Low carbon steel has carbon content up to what percentage?
Select one:

a.
2.5%

b.
2%

c.
0.3%

d.
3%

e.
1%

Answer 140

c.
0.3%

Question 141

A simple electric circuit consists of:
Select one:

a.
Source, load, resistance

b.
Conductor, load, source

c.
Current, resistance, conductor

d.
Voltage, current, conductor

e.
Voltage, inductance, conductance

Answer 141

b.
Conductor, load, source

Question 142

The major advantage of plastic pipe is:
Select one:

a.
Its resistance to corrosive materials

b.
Operating temperature range

c.
Operating pressure range

d.
Resistance to decomposition

e.
Ability to resist physical damage

Answer 142

a.
Its resistance to corrosive materials

Question 143

A light bulb in a circuit has a resistance of 100 ohms, and 1 ampere of current flows in the circuit when the switch is closed. What is the voltage output of the battery?
Select one:

a.
10 volts

b.
100 volts

c.
110 volts

d.
120 volts

e.
200 volts

Answer 143

b.
100 volts

Question 144

Low carbon steel is suitable for piping at temperatures up to:
Select one:

a.
750°C

b.
635°C

c.
545°C

d.
225°C

e.
427°C

Answer 144

e.
427°C

Question 145

Where fire protection is required for permanently installed tanks containing flammable or combustible liquids, ________ devices are installed inside the tank.
Select one:

a.
Water spray

b.
Air-foam generating

c.
Dry chemical extinguishing

d.
Gas injection

e.
Surface agitating

Answer 145

b.
Air-foam generating

Question 146

The behaviour of a separately excited generator with regard to its load characteristic is that as load increases, its delivery voltage:
Select one:

a.
Steeply rises

b.
Remains constant

c.
Slightly falls

d.
Slightly fluctuates

e.
Slightly above normal

Answer 146

c.
Slightly falls

Question 147

A2C01Q07 Which ASME BPVC code section contains the Recommended Rules for the Care and Operation of Heating Boilers?
Select one:

a.
Section IV

b.
Section IX

c.
Section VI

d.
Section I

Answer 147

c.
Section VI

Question 148

A2C13Q47 What do PLCs have to maintain the PLC’s memory in the event of a power outage?
Select one:

a.
Solar panels

b.
Standby generators

c.
Very low power consumption

d.
Backup batteries

Answer 148

d.
Backup batteries

Question 149

Single-phase transformers:
Select one:

a.
Use two common forms of construction known as the core type and the shell type.

b.
High-voltage coil is nearest the iron core.

c.
Are used in all power supplies.

d.
Use two common forms of construction known as the internal type and the external type.

e.
Are very low in efficiency.

Answer 149

a.
Use two common forms of construction known as the core type and the shell type.

Question 150

A2C13Q26 A process set point is changed. What must happen for it to take effect?
Select one:

a.
The operator must also change the control output signal

b.
The value of the set point must not exceed the process variable.

c.
The control loop must be in manual

d.
The control loop must be in automatic

Answer 150

d.
The control loop must be in automatic