Millwright - 2nd Year: Belts Part A Exam
Questions and Answers with Verified
Solutions | Latest Updated 2026
How does a V-belt transmit By gripping the sides of a groove in a
power? pulley
What are the advantages of 1. The most cost effective means of power
V-belts? transmission (compared to chains and
gears)
2. They are highly reliable
3. No lubrication is required
4. The absorb shock
5. They are quiet
6. They can slip on overload to protect
other
components
,What are the limitations of v-belts? 1. Most designs operate with fixed centre
distances
only
2. They have a minimum 120 degrees arc
of contact
3. They are unsuitable for positive drive
requirements such as timing
4. They are unsuitable for drives exposed
to high
temperatures
5. They are not practical for high surface
speeds
because of problems with dynamic
balancing
What are the main parts of a 1. Tensile members
standard v-belt? 2. Compression material
3. Cover
What purpose do tensile members They carry the load
in
a v-belt serve?
What is the function of Transmits power between the sheave and
compression the
material in a v-belt? tensile member and supports the cords.
How is the compression material The compression material is often
able to provide transverse rigidity? fibre-filled
What purpose does the cover Protects internal parts from wear, weather
serve? and
harmful substances
, What does the amount of power a 1. The strength of the tensile members
belt can transmit depend on? 2. The grip of the belt on the pulley
What does the grip of the belt on 1. Arc of contact
the 2. Tension applied to the belt
pulley depend on? 3. The coefficient of friction between the
belt and
the pulley
What is pitch line? A line than runs through the load-carrying
zone of
the belt where the tensile members are
located.
What is the industry standard As close as possible to the outside
when diameter of the
locating the pitch line and tensile sheave so that the widest cross-section of
members? Why? the belt
carries the load.
What is stretch? The increase in the length of the belt over
the
period of time that it is in service.
What is creep? The loss of driving speed due to the
lengthening
and shortening of the belt as it cycles from
the
slack side to the tight side
Questions and Answers with Verified
Solutions | Latest Updated 2026
How does a V-belt transmit By gripping the sides of a groove in a
power? pulley
What are the advantages of 1. The most cost effective means of power
V-belts? transmission (compared to chains and
gears)
2. They are highly reliable
3. No lubrication is required
4. The absorb shock
5. They are quiet
6. They can slip on overload to protect
other
components
,What are the limitations of v-belts? 1. Most designs operate with fixed centre
distances
only
2. They have a minimum 120 degrees arc
of contact
3. They are unsuitable for positive drive
requirements such as timing
4. They are unsuitable for drives exposed
to high
temperatures
5. They are not practical for high surface
speeds
because of problems with dynamic
balancing
What are the main parts of a 1. Tensile members
standard v-belt? 2. Compression material
3. Cover
What purpose do tensile members They carry the load
in
a v-belt serve?
What is the function of Transmits power between the sheave and
compression the
material in a v-belt? tensile member and supports the cords.
How is the compression material The compression material is often
able to provide transverse rigidity? fibre-filled
What purpose does the cover Protects internal parts from wear, weather
serve? and
harmful substances
, What does the amount of power a 1. The strength of the tensile members
belt can transmit depend on? 2. The grip of the belt on the pulley
What does the grip of the belt on 1. Arc of contact
the 2. Tension applied to the belt
pulley depend on? 3. The coefficient of friction between the
belt and
the pulley
What is pitch line? A line than runs through the load-carrying
zone of
the belt where the tensile members are
located.
What is the industry standard As close as possible to the outside
when diameter of the
locating the pitch line and tensile sheave so that the widest cross-section of
members? Why? the belt
carries the load.
What is stretch? The increase in the length of the belt over
the
period of time that it is in service.
What is creep? The loss of driving speed due to the
lengthening
and shortening of the belt as it cycles from
the
slack side to the tight side
