My Report

Design of Electrical Machines Practice Test 2


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. What are the factors the design of poles of the DC machine depends on?

2. How are the ratings of the transformer, losses and temperature rise related?

3. What is utilization factor?

4. What is the specific heat dissipated by the plain walled tanks of the transformer by radiation and convection?

5. What is the relationship between the number of steps to the area of circumscribing circle?

6. What is the flux in the pole body, given leakage coefficient = 1.2 and the useful flux per pole is 10 weber?

7. What is the range of the flux density in the pole shrank for laminated poles?

8. How is the circulation of oil improved in tanks with tubes?

9. For a DC generator, given D = 0.35 m, L = 0.21 m, Coefficient of output = 108.5, efficiency = 0.9, speed = 1400 rpm. What is the output power of the DC generator?

10. Large number of poles lead to large flashover between brushes.


 

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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