Utilization Of Electrical Energy Qusestion

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Q1:- In case of travelling cranes, the motor preferred for boom hoist is 

1. slip ring induction motor 
2. squirrel cage induction motor 
3. synchronous motor 
4. speed phase motor 

ANSWER:- 1

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Q2:- The characteristics of dive for crane hoisting is 

1. smooth movement 
2. precise control 
3. fast speed control 
4. all of the above

ANSWER:-4

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Q3:- The capacity of a crane is expressed in terms of 

1. span 
2. types of drive
3. tonnes 
4. any of these 

ANSWER:-3

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Q4:- The travelling speed of cranes varies from 

1. 1 to 2.5 m/s 
2. 5 to 10 m/s 
3. 10 to 20 m/s 
4. 20 to 40 m/s 

ANSWER:-1

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Q5:- The advantage of a synchronous motor in addition to its constant speed is 

1. high power factor 
2. better efficiency 
3. lower cost 
4. all of the above 

ANSWER:-1

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