Millwright - 2nd Year: Variable-Speed Power
Transmission Devices Exam Questions and
Answers with Verified Solutions | Latest
Updated 2026
What are the three main 1. Input impeller
components 2. Follower turbine
of a torque converter? 3. Stator (reactor)
What is a variable-speed drive? A drive that is used to control infinite
positioning of
material handling equipment
What are the main components of 1. Housing
a 2. Input shaft and energy source
mechanical variable speed drive? 3. Output shaft
4. A means of adjusting output shaft speed
What types of drives are found in a 1. V-belt
mechanical variable-speed drives? 2. Wide V-belt
3. Woodblock
4. Traction (friction) drives
Most traction drives have been variable frequency
replaced with
_________________ drives
,Belt and friction designs of 1750
variable
speed drives run at input speeds
of
____________ RPM.
What two operational ranges do 1. Constant torque
variable-speed mechanical drives 2. Constant horsepower
operate in?
The ____________________ constant torque
range occurs
when the output speed is below
the
input speed.
The ____________________ constant horsepower
range occurs
when the output speed is greater
than the input speed.
Older variable-speed drives are constant-speed
driven by __________________
electric
motors.
Newer variable-speed drives are computer controlled, variable-speed
__________________ electric
motors.
, What safety precaution must be De-energized and locked out
taken before working on a variable
speed drive?
Who must lock out equipment? Each person working on that equipment
and other
equipment that may pose a hazard
What are some systems that need 1. Main electrical feed power
to 2. Control power
be locked out when working on a 3. Hydraulic systems
variable-speed drive? 4. Pneumatic systems
After the equipment has bee A test start
locked
out, what must be done to ensure
it
is de-energized?
How are locks used from lock out With employee names or codes
typically identified?
What should be accompanied with Tags
the lock on a lock out?
What is the emergency stop used Emergency shut down of equipment in the
for? event of
an accident or major machine malfunction
Transmission Devices Exam Questions and
Answers with Verified Solutions | Latest
Updated 2026
What are the three main 1. Input impeller
components 2. Follower turbine
of a torque converter? 3. Stator (reactor)
What is a variable-speed drive? A drive that is used to control infinite
positioning of
material handling equipment
What are the main components of 1. Housing
a 2. Input shaft and energy source
mechanical variable speed drive? 3. Output shaft
4. A means of adjusting output shaft speed
What types of drives are found in a 1. V-belt
mechanical variable-speed drives? 2. Wide V-belt
3. Woodblock
4. Traction (friction) drives
Most traction drives have been variable frequency
replaced with
_________________ drives
,Belt and friction designs of 1750
variable
speed drives run at input speeds
of
____________ RPM.
What two operational ranges do 1. Constant torque
variable-speed mechanical drives 2. Constant horsepower
operate in?
The ____________________ constant torque
range occurs
when the output speed is below
the
input speed.
The ____________________ constant horsepower
range occurs
when the output speed is greater
than the input speed.
Older variable-speed drives are constant-speed
driven by __________________
electric
motors.
Newer variable-speed drives are computer controlled, variable-speed
__________________ electric
motors.
, What safety precaution must be De-energized and locked out
taken before working on a variable
speed drive?
Who must lock out equipment? Each person working on that equipment
and other
equipment that may pose a hazard
What are some systems that need 1. Main electrical feed power
to 2. Control power
be locked out when working on a 3. Hydraulic systems
variable-speed drive? 4. Pneumatic systems
After the equipment has bee A test start
locked
out, what must be done to ensure
it
is de-energized?
How are locks used from lock out With employee names or codes
typically identified?
What should be accompanied with Tags
the lock on a lock out?
What is the emergency stop used Emergency shut down of equipment in the
for? event of
an accident or major machine malfunction
