# Belt and Rope MCQ Set

**1. The ratio of tension of two sides of a flat belt is given by**

a. e^{-µ?} b. e^{µ?} c. e x µ x ? d. None of the above

(Ans:b)

**2. Crowning of a pulley is done to**

a. Prevent the slipping of a belt b. To increase the tension of a belt

c. To increase the angle of contact d. None of the above

(Ans:a)

**3. The power transmitted by a belt drive is (T _{1}=Tension on tight side, T_{2}=Tension on slack side, where v = linear velocity, ? = angular velocity)**

a. (T

_{1}-T

_{2}) x v b. (T

_{1}-T

_{2}) x ?

c. (T

_{1}-T

_{2}) / v d. (T

_{1}-T

_{2}) /?

(Ans:a)

**4. The ratio of tension of two sides of a v-belt is given by**

a. e

^{-µc?oseca}b. e

^{µ?coseca}c. e x µ x cosec? d. None of the above

where µ = coefficient of friction, ?=angle of contact, sina=(r

_{1}+r

_{2})/x

(Ans:b)

**5. The angle of contact (?) for crossed belt drive is given by**

a. 180-2a b. 180+2a c. 180-a d. 180+a

The value of a is given by sina=(r

_{1}+r

_{2})/x

Where r

_{1}=Radius of larger pulley

r

_{2 }=Radius of smaller pulley

x = Distance between the centers of the two pulleys.

(Ans:b)

**6. The angle of contact (?) for open belt drive is given by**

a. 180-2a b. 180+2a c. 180-a d. 180+a

The value of a is given by sina=(r

_{1}-r

_{2})/x

Where r

_{1}=Radius of larger pulley

r

_{2 }=Radius of smaller pulley

x = Distance between the centers of the two pulleys.

(Ans:a)

**7. The centrifugal tension (T**

_{c}) in the belt is given bya. T

_{c}= m x v

^{2}b. T

_{c}= 2m x v

^{2}c. T

_{c}= m / v

^{2}d. T

_{c}= 2m / v

^{2}

where m = mass of belt per unit length, v = velocity of belt in m/s

(Ans:a)

**8. Maximum power will be transmitted by belt when**

a. T

_{max}= 3m x v

^{2}b. T

_{max}= 2m x v

^{2}c. T

_{max}= 2m / v

^{2}d. T

_{max}= 3m / v

^{2}

where T

_{max}= Maximum tension, m = mass of belt per unit length

v = velocity of belt in m/s

(Ans:a)

**9. The initial tension (T**

_{0}) in a belt is given bya. T

_{0 }= (T

_{1}-T

_{2})/2 b. T

_{0 }= (T

_{1}+T

_{2})/2 c. T

_{0 }= (T

_{1}-T

_{2}) x 2 d. (T

_{1}+T

_{2}) x 2

Where T

_{1}=Tension on tight side of belt drive

T

_{2}=Tension on slack side of belt drive

(Ans:b)

**10. The ratio of tension of two sides of a rope drive is given by**

a. e

^{-µ?coseca}b. e

^{µ?coseca}c. e x µ x cosec? d. None of the above

where µ = coefficient of friction, ?=angle of contact, sina=(r

_{1}+r

_{2})/x

(Ans:b)

**11. In which of the following drives, there is no slip**

a. Open belt drive b. Crossed belt drive c. Rope drive d. Chain drive

(Ans:d)