My Report

Electric Drives Practice Test 1


Correct Answer: 2 points | Wrong: -1 point
Grades: A* (100% score) | A (80%-99%) | B (60%-80%) | C (40%-60%) | D (0%-40%)
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1. The slope of the V-I curve is 60°. Calculate the value of resistance. Assume the relationship between voltage and current is a straight line.

2. The unit of angular velocity is rad/s3.

3. 230V, 10A, 1500rpm DC separately excited motor having resistance of .2 ohm excited from external dc voltage source of 50V. Calculate the torque developed by the motor on full load.

4. The phase difference between voltage and current in the resistor.

5. Type-A chopper is used for obtaining which type of mode?

6. Calculate mark to space ratio if the system is on for 5 sec and off for 10 sec.

7. For large DC machines, the yoke is usually made of which material?

8. What type of force handles for active torques?

9. Calculate the value of the time period if the frequency of the signal is 70 sec.

10. Which of the following devices should be used as a switch for high power and high voltage application?


 

Manish Bhojasia - Founder & CTO at Sanfoundry
Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He lives in Bangalore, and focuses on development of Linux Kernel, SAN Technologies, Advanced C, Data Structures & Alogrithms. Stay connected with him at LinkedIn.

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