Electrical Engineering Mcqs — Test 20
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Question 1
As a result of armature reaction, the reduction in the total mutual air gap flux in a D.C. generator is approximately______________?
Question 2
Shunt generators are most suited for stable parallel operation because of their______________?
Question 3
The main factor which leads to unstable parallel operation of flat and over compounded generators is_____________?
Question 4
If a self excited D.C. generator after being installed, fails to build up on its first trial run, the first thing to do is to______________?
Question 5
When two D.C. generators are running in parallel an equilizer bar is used______________?
Question 6
The essential condition for parallel operation of two D.C. generators is that they have ________________?
Question 7
Two D.C. shunt generators, each with armature resistance of 0.02 ohm and field resistance of 50 ohm run in parallel and supply a total current of 1000 amperes to the load circuit. If their e.m.fs. are 270 V and 265 V, their bus bar voltage will be_____________________?
Question 8
With a D.C. generator which of the following regulation is preferred ?
Question 9
The open circuit voltage of a compound generator is 250 V. At full load the terminal voltage____________?
Question 10
Which of the following component is usually fabricated out of silicon steel ?