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A 50 kW motor using six V-belts is used in a pump mill....

Q.  
A 50 kW motor using six V-belts is used in a pump mill. If one of the belts break after a month of continuous running then


Answer & Explanation

All the belts should be changed to avoid uneven tension and over-loading of smaller length belts

Thus correct option is: B.

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More Questions Theory of Machines:

Q.  
In multiple V-belt drives, when a single belt is damaged, it is preferable to change the complete set to

A. Reduce vibration

B. Reduce slip

C. Ensure uniform loading

D. Ensure proper alignment


Answer & Explanation

Q.  
When a belt drive is transmitting maximum power

A. Effective tension is equal to centrifugal tension

B. Effective tension is half of centrifugal tension

C. Driving tension on slack side is equal to the centrifugal tension

D. Driving tension on tight side is thrice the centrifugal tension


Answer & Explanation

Q.  
If µ is the actual coefficient of friction in a belt moving in grooved pulley, the groove angle being 2α, the virtual coefficient of friction will be

A. µ/sin(α)

B. µ/cos(α)

C. µsin(α)

D. µcos(α)


Answer & Explanation

Q.  
Centrifugal tension in belts is

A. Useful because it maintains some tension even when no power is transmitted

B. Not harmful because it does not take part in power transmission

C. Harmful because it increases belt tension and reduces power transmitted

D. A hypothetical phenomenon and does not actually exist in belts


Answer & Explanation
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