POWER ENGINEERING 3A2 EXAM PRACTICE
QUESTIONS WITH COMPLETE SOLUTIONS
What is the minimum required wall thickness of a strength
welded watertube boiler tube with an O.D. of 80mm?
1.7mm
What is a possible cause of unstable fuel oil combustion in the
furnace?
Low fuel oil pressure
How much oxygen is required to burn 1 kg of carbon?
2.7 kg
What device utilizes a movable contact to adjust the length of
resistance wire to change current flow?
Rheostat
What indication does a variable area meter provide in process
systems?
Flow indication.
What type of DC motor will overspeed if the entire load is
removed during operation?
Series DC motor
At what pressure must a blowoff vessel be designed if a boiler
operates over 2060 kPa?
At least 690 kPa.
,What are the two common forms of transformer construction?
Core and shell.
What does stamping the jurisdiction's identification number on
boiler and pressure vessel equipment provide?
Provincial identification.
What are the three types of designs for gate valves?
Flexible, solid, and split.
What is the full load real power of a generator producing three
phase power at 220 V with a full load current of 200 A and a
power factor of 0.80?
60.9 kW.
At what speeds are salient pole rotors installed on alternators?
Operating at speeds below 1800 RPM.
What is the minimum thickness required for a seamless steam
pipe made of SA-210-C?
8.01mm.
What is a sine wave that repeats its value at regular intervals
referred to as?
Periodic.
What does a step down transformer have more of?
More turns on the primary winding than the secondary winding.
, What is the impedance of a circuit with a 30 V 40 Hz AC power
source connected to a 200 ohm resistor, a 6 mF capacitor, and a
2.8 H inductor?
731 Ohms.
What happens as the number of poles installed increases in an
induction motor?
The slower the induction motor spins.
What will dictate the approval for design changes of a pressure
vessel?
The administrator.
What meter would you check to determine the reactive power
created by a generator?
Kilovars meter.
How many classes are there in WHMIS?
Six.
What is the maximum outlet pressure and temperature for a hot
water heating boiler under ASME Boiler & Pressure Vessel
Code Section IV?
1,100 kPa and 120°C.
Who must designate power to a safety codes officer to perform
their role?
The administrator.
What is an advantage of the auto-transformer design?
QUESTIONS WITH COMPLETE SOLUTIONS
What is the minimum required wall thickness of a strength
welded watertube boiler tube with an O.D. of 80mm?
1.7mm
What is a possible cause of unstable fuel oil combustion in the
furnace?
Low fuel oil pressure
How much oxygen is required to burn 1 kg of carbon?
2.7 kg
What device utilizes a movable contact to adjust the length of
resistance wire to change current flow?
Rheostat
What indication does a variable area meter provide in process
systems?
Flow indication.
What type of DC motor will overspeed if the entire load is
removed during operation?
Series DC motor
At what pressure must a blowoff vessel be designed if a boiler
operates over 2060 kPa?
At least 690 kPa.
,What are the two common forms of transformer construction?
Core and shell.
What does stamping the jurisdiction's identification number on
boiler and pressure vessel equipment provide?
Provincial identification.
What are the three types of designs for gate valves?
Flexible, solid, and split.
What is the full load real power of a generator producing three
phase power at 220 V with a full load current of 200 A and a
power factor of 0.80?
60.9 kW.
At what speeds are salient pole rotors installed on alternators?
Operating at speeds below 1800 RPM.
What is the minimum thickness required for a seamless steam
pipe made of SA-210-C?
8.01mm.
What is a sine wave that repeats its value at regular intervals
referred to as?
Periodic.
What does a step down transformer have more of?
More turns on the primary winding than the secondary winding.
, What is the impedance of a circuit with a 30 V 40 Hz AC power
source connected to a 200 ohm resistor, a 6 mF capacitor, and a
2.8 H inductor?
731 Ohms.
What happens as the number of poles installed increases in an
induction motor?
The slower the induction motor spins.
What will dictate the approval for design changes of a pressure
vessel?
The administrator.
What meter would you check to determine the reactive power
created by a generator?
Kilovars meter.
How many classes are there in WHMIS?
Six.
What is the maximum outlet pressure and temperature for a hot
water heating boiler under ASME Boiler & Pressure Vessel
Code Section IV?
1,100 kPa and 120°C.
Who must designate power to a safety codes officer to perform
their role?
The administrator.
What is an advantage of the auto-transformer design?
