Millwright - 2nd Year: Clutches and
Brakes Exam Questions and Answers
100% score Latest update 2026
What is the purpose of a clutch? -
correct answer ✅To engage or disengage a driven machine,
without starting and stopping the prime mover
What is a positive contact clutch? -
correct answer ✅A clutch that depends on interlocking parts for
engagement and does not allow slippage
What are the disadvantages of a positive contact clutch? -
correct answer ✅1. Cannot be engaged at high speeds due to
shock loads transmitted upon engagement
2. It may not be possible to engage unless the driver and driven unit
are completely stopped because the mating parts do not line up
What are the 3 types of positive contact clutches? -
correct answer ✅1. Square jaw
2. Spiral Jaw
3. Multiple-tooth design
,Millwright - 2nd Year: Clutches and
Brakes Exam Questions and Answers
100% score Latest update 2026
What is a square jaw clutch? -
correct answer ✅A clutch that uses interlocking square jaws that
lock into mating recesses in its face member
True or false. Square jaw clutches are bidirectional. -
correct answer ✅True
What speeds can a square jaw clutch be engaged? -
correct answer ✅very low speeds
A square jaw clutch can be disengaged at any speed as long as it is
not __________________________________. -
correct answer ✅transmitting high torque
What two factors determine the magnitude of the shock when
engaging a square jaw clutch? -
correct answer ✅Speed of the engagement and the resistance of
the shaft
, Millwright - 2nd Year: Clutches and
Brakes Exam Questions and Answers
100% score Latest update 2026
What is used to actuate a square jaw clutch? -
correct answer ✅Manual levers, electric solenoids, or a pneumatic
or hydraulic cylinder
What is a spiral jaw clutch? -
correct answer ✅A clutch where the jaws a re squre on one side
and have a slope on the opposite
Can spiral clutches be engaged at hire speeds than square jaw
clutches? -
correct answer ✅Yes
What allows one of the positive contact clutch jaws to slide axially?
-
correct answer ✅Splines or being keyed to the shaft
A ________________ clutch drives in one direction only. -
correct answer ✅Spiral
Brakes Exam Questions and Answers
100% score Latest update 2026
What is the purpose of a clutch? -
correct answer ✅To engage or disengage a driven machine,
without starting and stopping the prime mover
What is a positive contact clutch? -
correct answer ✅A clutch that depends on interlocking parts for
engagement and does not allow slippage
What are the disadvantages of a positive contact clutch? -
correct answer ✅1. Cannot be engaged at high speeds due to
shock loads transmitted upon engagement
2. It may not be possible to engage unless the driver and driven unit
are completely stopped because the mating parts do not line up
What are the 3 types of positive contact clutches? -
correct answer ✅1. Square jaw
2. Spiral Jaw
3. Multiple-tooth design
,Millwright - 2nd Year: Clutches and
Brakes Exam Questions and Answers
100% score Latest update 2026
What is a square jaw clutch? -
correct answer ✅A clutch that uses interlocking square jaws that
lock into mating recesses in its face member
True or false. Square jaw clutches are bidirectional. -
correct answer ✅True
What speeds can a square jaw clutch be engaged? -
correct answer ✅very low speeds
A square jaw clutch can be disengaged at any speed as long as it is
not __________________________________. -
correct answer ✅transmitting high torque
What two factors determine the magnitude of the shock when
engaging a square jaw clutch? -
correct answer ✅Speed of the engagement and the resistance of
the shaft
, Millwright - 2nd Year: Clutches and
Brakes Exam Questions and Answers
100% score Latest update 2026
What is used to actuate a square jaw clutch? -
correct answer ✅Manual levers, electric solenoids, or a pneumatic
or hydraulic cylinder
What is a spiral jaw clutch? -
correct answer ✅A clutch where the jaws a re squre on one side
and have a slope on the opposite
Can spiral clutches be engaged at hire speeds than square jaw
clutches? -
correct answer ✅Yes
What allows one of the positive contact clutch jaws to slide axially?
-
correct answer ✅Splines or being keyed to the shaft
A ________________ clutch drives in one direction only. -
correct answer ✅Spiral
