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SSC JE 2017: Electrical Machines Rankers Quiz 5
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Question 1
As compared to a split phase motor, a capacitor start motor has ________.
Question 2
What is the effect produced by the electric current in an electric motor?
Question 3
The function of the commutator in a DC machine is ___________.
Question 4
Which one of the following generators is used for charging batteries?
Question 5
If the current in the armature of DC series motor is reduced by 5%, the torque of the motor will become __________.
Question 6
Electrons flow through the metallic conductor shown in the figure. What is the approximate velocity of these electrons?
Question 7
D.C. motors should be stopped by opening the line switched and not by forcing the starter handle back to the off position because –
1. heavy sparking occurs at the brushes.
2. heavy sparking occurs at the first stud of the starting resistance steps.
1. heavy sparking occurs at the brushes.
2. heavy sparking occurs at the first stud of the starting resistance steps.
Question 8
In the D.C. motor, starters are generally used –
1. To increase the starting torque
2. To limit the starting current
1. To increase the starting torque
2. To limit the starting current
Question 9
The voltage regulation of a transformer having copper loss 1% of output and percentage reactance drop of 5% and power factor 0.9 lagging is __________.
Question 10
The full load slip of a 4-pole, 50Hz, 3-phase induction motor rotating at 1410 r.p.m is __________.
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Nov 2ESE & GATE EE
