Millwright Interprovincial (Red Seal)
Review Exam 3
Which of the following is true with respect to using oil as lubrication?
A) It is more convenient to retain
B) It contains contaminants
C) It carries away heat
D) Cannot permit high speeds - Answer-C) It carries away heat
Which of the following best describes an axial labyrinth seal?
A) It can only tolerate very limited axial and radial movements
B) It is the simplest and cheapest
C) It does not alter widths of gaps allowing them to be very small - Answer-C) it does
not alter widths of gaps allowing them to be very small
The system that is based on the circular distance from one centre of one tooth to the
center of the next tooth on a gear is called the _________ system.
A) diametral
B) circular pitch
C) metric module
D) English module - Answer-B) Circular Pitch
1. Case nut die should only be used to:
A) produce extra fine threads.
B) recondition threads.
C) clean threads.
D) both B and C. - Answer-D) both B and C
The type of contour hacksaw blade that would be best for cutting a straight accurate cut
in non-ferrous metals would be:
A) a high carbon steel blade.
B) a tungsten carbide blade.
C) a bimetal blade.
D) all of the above. - Answer-A) a high carbon steel blade
What is feed back?
A) The term used when a signal that is derived from an amplifier is sent back to the
position measuring device at the solenoid or actuator
B) The term used when a signal that is derived from a position measuring device at the
solenoid or actuator is sent back to the amplifier card
C) The wave form kick emitted from an inductive loads with a DC supply
, D) Harmonic activity associated with noise from AC waveforms - Answer-B) The term
used when a signal that is derived from a position measuring device at the solenoid or
actuator is sent back to the amplifier card
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 - Answer-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 - Answer-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 - Answer-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. - Answer-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 - Answer-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
Review Exam 3
Which of the following is true with respect to using oil as lubrication?
A) It is more convenient to retain
B) It contains contaminants
C) It carries away heat
D) Cannot permit high speeds - Answer-C) It carries away heat
Which of the following best describes an axial labyrinth seal?
A) It can only tolerate very limited axial and radial movements
B) It is the simplest and cheapest
C) It does not alter widths of gaps allowing them to be very small - Answer-C) it does
not alter widths of gaps allowing them to be very small
The system that is based on the circular distance from one centre of one tooth to the
center of the next tooth on a gear is called the _________ system.
A) diametral
B) circular pitch
C) metric module
D) English module - Answer-B) Circular Pitch
1. Case nut die should only be used to:
A) produce extra fine threads.
B) recondition threads.
C) clean threads.
D) both B and C. - Answer-D) both B and C
The type of contour hacksaw blade that would be best for cutting a straight accurate cut
in non-ferrous metals would be:
A) a high carbon steel blade.
B) a tungsten carbide blade.
C) a bimetal blade.
D) all of the above. - Answer-A) a high carbon steel blade
What is feed back?
A) The term used when a signal that is derived from an amplifier is sent back to the
position measuring device at the solenoid or actuator
B) The term used when a signal that is derived from a position measuring device at the
solenoid or actuator is sent back to the amplifier card
C) The wave form kick emitted from an inductive loads with a DC supply
, D) Harmonic activity associated with noise from AC waveforms - Answer-B) The term
used when a signal that is derived from a position measuring device at the solenoid or
actuator is sent back to the amplifier card
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 - Answer-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 - Answer-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 - Answer-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. - Answer-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 - Answer-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
