Millwright Interprovincial (Red Seal) Review Exam
Study QUESTIONS/ANSWERS (VERIFIED AND WELL
DETAILED ANSWERS) LATEST UPDATE 2024/2025
1. What should be checked if a motor has a loss of power?
A) Internal leaks in valve spool or in cylinders, vane tips or gears
B) Internal leaks in cylinders, vane tips or gear teeth and case
C) Relief valve setting too low
D) Cavitation
E) Misalignment
F) Bearings - ✔✔C) Relief valve setting too low
Environmental pollution in pneumatic systems occurs in the form of:
A) dirt or dust
B) noise and oil mists
C) cavitation and aeration - ✔✔B) noise and oil mist
1. Which of the following is a possible cause of pressure relief valve problems?
A) Incorrect adjustment
B) Damaged or worn valves
C) Broken springs
D) All of the above - ✔✔D) All the above
Steel piping used with engines should be pickled which is:
A) running an acid bath through the piping.
,B) painting to prevent rust.
C) spraying it with a silicone sealing compound.
D) a form of sanding. - ✔✔A) Running an acid bath through the piping
1. Which of the following best describes stainless steel pipe?
A) It is used for its corrosion resistance but not at hydraulic pressures
B) It can not be used for high pressure and high temperatures
C) They offer excellent corrosion resistance but they catalyze the oxidation of hydraulic
fluid
D) It is mainly used in pipes that carry a corrosive product at high temperatures and
pressure
E) It is the most common material for making pipe - ✔✔D) It is mainly used in pipes
that carry a corrosive product at high temperatures and pressure.
What should be checked if a hydraulic cylinder moves a load slower than it normally
would?
A) Leaky rod wipers
B) Seals end covers and fittings
C) Supply hose restricted by a kink, or collapsed inner tube
D) Air leaks at fittings, rod seals and end covers
E) Relief valve set too low
F) Piston seals leaking - ✔✔C) Supply hose restricted by kink, or collapsed inner tube
With a proportional solenoid the spool movement is not proportional to the electrical
input.
A) True
B) False - ✔✔B) False
, The purpose of a pre-lube pump on an industrial engine is to:
A) quickly pressurize the main oil pump as soon as the engine starts.
B) maintain oil pressure even when the engine is idling.
C) continue to pump oil and cool the engine after it has been turned off.
D) get oil to critical engine parts before the engine turns over. - ✔✔D) get oil to
critical engine parts before the engine turns over.
What is full film thickness?
A) Lubrication that is achieved at operating speeds
B) When fluids begins to flood the valleys between surfaces
C) When only irregularities of the inside of a machine are coated
D) A lubrication that separates two surfaces that deform under load - ✔✔A)
Lubrication that is achieved at operating speeds
1. When lockout on a piece of equipment occurs it must remove:
A) electrical power.
B) hydraulic pressure.
C) pneumatic pressure.
D) all of the above. - ✔✔D) All the above
When shaft alignment is performed it can be accomplished by using the method of:
A) laser alignment.
B) cross dialing.
C) rim and face.
D) all of the above. - ✔✔D) all the above
Study QUESTIONS/ANSWERS (VERIFIED AND WELL
DETAILED ANSWERS) LATEST UPDATE 2024/2025
1. What should be checked if a motor has a loss of power?
A) Internal leaks in valve spool or in cylinders, vane tips or gears
B) Internal leaks in cylinders, vane tips or gear teeth and case
C) Relief valve setting too low
D) Cavitation
E) Misalignment
F) Bearings - ✔✔C) Relief valve setting too low
Environmental pollution in pneumatic systems occurs in the form of:
A) dirt or dust
B) noise and oil mists
C) cavitation and aeration - ✔✔B) noise and oil mist
1. Which of the following is a possible cause of pressure relief valve problems?
A) Incorrect adjustment
B) Damaged or worn valves
C) Broken springs
D) All of the above - ✔✔D) All the above
Steel piping used with engines should be pickled which is:
A) running an acid bath through the piping.
,B) painting to prevent rust.
C) spraying it with a silicone sealing compound.
D) a form of sanding. - ✔✔A) Running an acid bath through the piping
1. Which of the following best describes stainless steel pipe?
A) It is used for its corrosion resistance but not at hydraulic pressures
B) It can not be used for high pressure and high temperatures
C) They offer excellent corrosion resistance but they catalyze the oxidation of hydraulic
fluid
D) It is mainly used in pipes that carry a corrosive product at high temperatures and
pressure
E) It is the most common material for making pipe - ✔✔D) It is mainly used in pipes
that carry a corrosive product at high temperatures and pressure.
What should be checked if a hydraulic cylinder moves a load slower than it normally
would?
A) Leaky rod wipers
B) Seals end covers and fittings
C) Supply hose restricted by a kink, or collapsed inner tube
D) Air leaks at fittings, rod seals and end covers
E) Relief valve set too low
F) Piston seals leaking - ✔✔C) Supply hose restricted by kink, or collapsed inner tube
With a proportional solenoid the spool movement is not proportional to the electrical
input.
A) True
B) False - ✔✔B) False
, The purpose of a pre-lube pump on an industrial engine is to:
A) quickly pressurize the main oil pump as soon as the engine starts.
B) maintain oil pressure even when the engine is idling.
C) continue to pump oil and cool the engine after it has been turned off.
D) get oil to critical engine parts before the engine turns over. - ✔✔D) get oil to
critical engine parts before the engine turns over.
What is full film thickness?
A) Lubrication that is achieved at operating speeds
B) When fluids begins to flood the valleys between surfaces
C) When only irregularities of the inside of a machine are coated
D) A lubrication that separates two surfaces that deform under load - ✔✔A)
Lubrication that is achieved at operating speeds
1. When lockout on a piece of equipment occurs it must remove:
A) electrical power.
B) hydraulic pressure.
C) pneumatic pressure.
D) all of the above. - ✔✔D) All the above
When shaft alignment is performed it can be accomplished by using the method of:
A) laser alignment.
B) cross dialing.
C) rim and face.
D) all of the above. - ✔✔D) all the above
