# Mechatronics Questions and Answers – Mechanical Actuating Systems – Chain Drives

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This set of Mechatronics Multiple Choice Questions & Answers (MCQs) focuses on “Mechanical Actuating Systems – Chain Drives”.

1. What is the pitch of a gear if the gear contains 24 teeth and radius of the gear is 6 inches?
a) 2
b) 3
c) 4
d) 5

Explanation: Given:
No. Of teeth=24 teeth
Diameter=2*6=12 inches
Pitch=Number of teeth/ Diameter
Pitch=24/12=2.

2. What is the number of teeth in a gear if pitch is 3.33 and radius of the gear is 3 inches?
a) 20
b) 13
c) 14
d) 15

Explanation: Given:
Diameter=2*3=6 inches
Pitch=Number of teeth/Diameter
3.33 = Number of teeth/6
Number of teeth=6*3.33=>19.98
Now round off the value to the nearest decimal value which gives Number of teeth = 20.

3. What is the torque offered by a gear, if the tangential force is 20 N and radius of the gear is 0.5m?
a) 5Nm
b) 15Nm
c) 10Nm
d) 2.55Nm

Explanation: Given: Tangential force=20 N
Radius of the gear = 0.5m
Torque = Tangential force*radius of the gear
Torque=20*0.5 => 10Nm.
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4. What is the radius of a gear, if torque generated by the gear is 20Nm and the tangential force is 10N?
a) 5m
b) 15m
c) 10m
d) 2m

Explanation: Given:
torque generated by the gear=20Nm
tangential force=10N

5. Chain moves over belt drives.
a) True
b) False

Explanation: Chain does not move over belt drives. It moves over gear drives. These gear drives constitute of spike like structures called teeth. These teeth get into the empty spaces of the chain and transmit torque.
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6. Belt drives can slip.
a) True
b) False

Explanation: Belt drives can slip. Since friction plays very important role in transmission of torque in belt drives, so there should be enough friction between belt and the drive so that it does not slip. Chain drives do not slip.

7. Which type of drive is used in motor vehicles, for transferring torque between two shafts present at a distance of more than one meter?
a) Chain drives
b) Belt Drives
c) Rope drives
d) Gear drives

Explanation: Chain drives are used in motor vehicles, for transferring torque between two shafts present at a distance of more than one meter. Since there should not be any slip, so we cannot use rope drive or belt drive. Gear drive does not slip, but it is suitable for transferring torque between two shafts present at very less distance.

8. What is the torque offered by a gear, if the tangential force is 10N and radius of the gear is 0.5m?
a) 5Nm
b) 15Nm
c) 10Nm
d) 2.55Nm

Explanation: Given: Tangential force=10 N
Radius of the gear = 0.5m
Torque = Tangential force* radius of the gear
Torque=10*0.5 => 5Nm.

9. What is the radius of a gear, if torque generated by the gear is 20Nm and the tangential force is 5N?
a) 5m
b) 4m
c) 10m
d) 2m

Explanation: Given:
torque generated by the gear=20Nm
tangential force=5N

10. Which type of joints connects the links of a chain?
a) Stationary joints
b) Pin joints
c) Bolted joints
d) Pivot joints

Explanation: Pin joints connect the links of a chain. Each link of the chain has got its two sides connected with other links with the help of pin joints. These joint allows free movement of the links, which is collectively known as a chain.

11. What is the pitch of a gear if the gear contains 20 teeth and radius of the gear is 2 inches?
a) 2
b) 3
c) 4
d) 5

Explanation: Explanation: Given:
No. Of teeth=20 teeth
Diameter=2*2=4 inches
Pitch=Number of teeth/ Diameter
Pitch=20/4=5.

12. What is the torque offered by a gear, if the tangential force is 12N and radius of the gear is 0.2m?
a) 2.4 Nm
b) 15Nm
c) 10Nm
d) 2.55Nm

Explanation: Given: Tangential force=12 N
Radius of the gear = 0.2m
Torque = Tangential force* radius of the gear
Torque=12*0.2 => 2.4 Nm.

13. What is the radius of a gear, if torque generated by the gear is 12Nm and the tangential force is 3N?
a) 5m
b) 4m
c) 10m
d) 2m

Explanation: Given:
torque generated by the gear=12Nm
tangential force=3N

14. A partially circular chain has perimeter of 10cm and is made up of 2 cm links. How many links are present in total?
a) 5m
b) 4m
c) 10m
d) 12m

Explanation: Given:
Perimeter of circular chain = 10cm
Length of each link = 2cm

15. A chain is kept in square fashion with one of its side equal to 5 cm and is made up of 2 cm links. How many links are present in total?
a) 5m
b) 4m
c) 10m
d) 12m

Explanation: Given:
Length of one side of square chain = 5cm
Perimeter of square=4*5=>20
Length of each link = 2cm

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