A2 Comprehensive Review 2 Flashcards
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.
d.
Current is 4 times original.
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
b.
Star, delta
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
a.
Three-phase alternator
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
a.
Class A and B
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
c.
Top rim
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
d.
1, 2
A T-shaped channel can be found in some _____ valves.
Select one:
a.
Gate
b.
Globe
c.
Ball
d.
Butterfly
e.
Multiport plug
e.
Multiport plug
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
b.
Observe the discharge by means of a test valve
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
a.
103 MPa
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
b.
1, 2, 4, 5
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
b.
Inside diameter
Inductive reactance opposes:
Select one:
a.
Resistance
b.
Current flow
c.
Capacitance
d.
Voltage
e.
Conductance
b.
Current flow
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
b.
CSA-B52
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
b.
A difference in coefficient of expansion
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
b.
Body, bonnet, diaphragm
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
c.
Can use wired or wireless networks
Combination locks _____ be used for lockout.
Select one:
A.
Could
B.
Must not
C.
May, in certain locations
D.
Are recommended to
E.
Must
B.
Must not
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
B.
1, 2, 6
In a thermostatic trap, the bellows are usually filled with:
Select one:
a.
Mercury
b.
Water
c.
Alcohol
d.
Carbon dioxide
e.
Helium
c.
Alcohol
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
b.
Baffle-type separator
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
B.
Ones and zeros
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%
c.
20%
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
b.
Not self-starting
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
b.
Solid, flexible, split
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
d.
Red
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
b.
Bellows under vacuum
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
a.
375 milliohms
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
a.
Generate a control signal
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
B.
Dead, live
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
E.
1, 2, 3
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
d.
1, 3, 5
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
a.
Jurisdictional authority
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
d.
Weld neck flange
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
e.
33.94 A
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
d.
4°C
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
A.
Leads the voltage by 90 degrees
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
e.
Before steam traps
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
d.
Rods or chains
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
D.
NBBI
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
a.
Pressure
A2C13Q15 RTUs are ________________.
Select one:
a.
Restricted telemetry units
b.
Remote terminal units
c.
Remote telephone users
d.
Located in central control rooms
b.
Remote terminal units
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
c.
Compound
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
E.
Induction motor
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-
b.
Single-phase
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
c.
10 000
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
d.
1
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
e.
Right
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
c.
3, 4
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
d.
Inserted
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
b.
Class B
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
e.
Weld neck flange
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
b.
Seconds
The measuring instrument used with a Wheatstone bridge circuit is:
Select one:
a.
Megger
b.
Galvanometer
c.
Ohm-meter
d.
Ammeter
e.
Voltmeter
b.
Galvanometer
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
b.
Boiler dimensions
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
d.
1, 2, 4
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
d.
NOT
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
a.
After the bypass is fully opened and there is no pressure rise in the steam header
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
c.
Star (wye), delta
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
d.
0.95
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
b.
0.707 amps
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
b.
Proportional to armature current
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%
e.
100%
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
c.
2.75 mm
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
a.
B, ɸ
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
a.
454°C
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
d.
Methane and carbon dioxide
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
e.
12.4 mm
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)
b.
3 stories (14 m)
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
a.
Expansion bend
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
c.
1, 2, 4
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
d.
24.2 cents
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
c.
1, 2, 4, 6
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
a.
60
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%
e.
100%, 100%
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
a.
45.55 mm
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
b.
False
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
a.
The control system begins a controlled, fully automatic, sequential shutdown
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
c.
333.33 kHz
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
b.
Synchronous, synchronous
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
d.
Oil tank
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
C.
1, 3, 4
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
b.
In phase
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
c.
NFPA Standard 20
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
b.
Demineralizer regeneration
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
a.
The plug must be designed as specified in the ASME Code
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
a.
Increases the travel of the bellows
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
d.
Increase the accuracy of temperature reading
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
b.
Methane
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
c.
Manufacturer’s data report
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
c.
An alarm that triggers a sequence of other alarms
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
c.
Safety data sheet
Transformers are cooled by:
1. Spraying water over the coils
- Placing the core in an oil-filled tank
- Forced cooling, using fans
- 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
C.
2, 3
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
C.
Worker
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
d.
0.5
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
b.
Multi-purpose dry chemical
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)
a.
Authorized Inspector (AI)
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
a.
Disc and seat
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
d.
Lags voltage by 90 degrees
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
a.
Refractory insulation
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
d.
Stainless steel
Electrostatic precipitators have an efficiency of greater than:
Select one:
a.
75%
b.
80%
c.
85%
d.
90%
e.
95%
e.
95%
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
b.
Large, large, short
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
b.
12 m
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
B.
14.85 mm
Flow rate is often measured with a(n):
Select one:
a.
Pedometer
b.
Ultrasonic meter
c.
Speedometer
d.
Velocity meter
e.
Orifice plate
e.
Orifice plate
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
e.
4.2 kWh
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
d.
Adjusts the manipulated variable in response to changes in demand load
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
D.
Trench
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
d.
1, 3, 5, 6
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
c.
Giving an indication of the DC voltage that is being supplied to the generator’s field windings
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
b.
All of the above
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.
B.
The plunger is connected directly to the disc of a globe valve.
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
e.
427°C
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
d.
1.978 mm
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
c.
60 hertz
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
C.
pressure, equalizing
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
d.
The shop’s quality control system
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
b.
Maximum allowable working pressure
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
b.
Amplitude
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
d.
480 Ω
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
b.
Arc thermal performance value
To measure the heat value of coal, the instrument used is a:
Select one:
a.
Anemograph
b.
Thermometer
c.
Hydrometer
d.
Calorimeter
e.
Compensator
d.
Calorimeter
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
E.
Demolition permits
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.
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.
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
c.
Preventive
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
b.
Natural gas
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
b.
Excitation voltage
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
e.
1, 2, 3, 4, 5
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
A.
Straight, open
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
c.
7310 kPa
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.
b.
Properties, characteristics
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
b.
Lower a weight on a stout string into the hydrant to see if it strikes ice or water
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
a.
Impulse
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
B.
40 milliamps
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
c.
One, two
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
c.
Group
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
a.
Insulating cement
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
a.
DC power to single-phase AC
Interpoles carry _____ current.
Select one:
a.
Field
b.
Load
c.
Flux
d.
Armature
e.
Stator
d.
Armature
Low carbon steel has carbon content up to what percentage?
Select one:
a.
2.5%
b.
2%
c.
0.3%
d.
3%
e.
1%
c.
0.3%
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
b.
Conductor, load, source
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
a.
Its resistance to corrosive materials
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
b.
100 volts
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
e.
427°C
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
b.
Air-foam generating
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
c.
Slightly falls
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
c.
Section VI
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
d.
Backup batteries
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.
a.
Use two common forms of construction known as the core type and the shell type.
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
d.
The control loop must be in automatic
