# MCQs on Mechanical Actuating Systems – Chain Drives

1 - Question

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*Radius Diameter=2*6=12 inches Pitch=Number of teeth/ Diameter Pitch=24/12=2.

2 - Question

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*Radius 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 - Question

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

4 - Question

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

5 - Question

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.

6 - Question

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 - Question

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 - Question

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 - Question

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

10 - Question

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 - Question

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*Radius Diameter=2*2=4 inches Pitch=Number of teeth/ Diameter Pitch=20/4=5.

12 - Question

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 - Question

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

14 - Question

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 Number of links = Perimeter/Length of each link Number of links = 10/2 => 5 links.

15 - Question

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