# Multiple Choice Questions (MCQ) on Belt and Rope drive

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

a. e^{-μθ} b. e^{μθ} c. e x μ x θ 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, ω = angular velocity)**

a. (T_{1}-T_{2}) x v b. (T_{1}-T_{2}) x ω

c. (T_{1}-T_{2}) / v d. (T_{1}-T_{2}) /ω

(Ans:a)

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

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

where µ = coefficient of friction, θ=angle of contact, sinα=(r_{1}+r_{2})/x

(Ans:b)

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

a. 180-2α b. 180+2α c. 180-α d. 180+α

The value of α is given by sinα=(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 (θ) for open belt drive is given by**

a. 180-2α b. 180+2α c. 180-α d. 180+α

The value of α is given by sinα=(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 by**

a. 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 by**

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

where µ = coefficient of friction, θ=angle of contact, sinα=(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)