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

View Answer

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. 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

View Answer

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. 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

View Answer

Explanation: Given: Tangential force=20 N

Radius of the gear = 0.5m

Torque = Tangential force*radius of the gear

Torque=20*0.5 => 10Nm.

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

View Answer

Explanation: Given:

torque generated by the gear=20Nm

tangential force=10N

torque(T)=tangential force (F)*Radius(R)

so radius=Torque(T)/Tangential force(F)

radius=20Nm/10m=>2m.

5. Chain moves over belt drives.

a) True

b) False

View Answer

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. Belt drives can slip.

a) True

b) False

View Answer

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

View Answer

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

View Answer

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

View Answer

Explanation: Given:

torque generated by the gear=20Nm

tangential force=5N

torque(T)=tangential force (F)*Radius(R)

so radius=Torque(T)/Tangential force(F)

radius=20Nm/5m=>4m.

10. Which type of joints connects the links of a chain?

a) Stationary joints

b) Pin joints

c) Bolted joints

d) Pivot joints

View Answer

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

View Answer

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. 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

View Answer

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

View Answer

Explanation: Given:

torque generated by the gear=12Nm

tangential force=3N

torque(T)=tangential force (F)*Radius(R)

so radius=Torque(T)/Tangential force(F)

radius=12Nm/3m=>4m.

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

View Answer

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. 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

View Answer

Explanation: Given:

Length of one side of square chain = 5cm

Perimeter of square=4*5=>20

Length of each link = 2cm

Number of links = Perimeter/Length of each link

Number of links = 20/2 => 10 links.

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