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SSC JE EE : Technical Quiz 17

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Question 1

In electrodynamometer ammeter, the deflection of the pointer scale is proportional to

Question 2

in which welding, the parts lie in the same plane and are joined at their edges

Question 3

Faraday’s Law of Induction is represented as _______.

Question 4

When the soil favors the corrosion then which electrode should be preferred?

Question 5

Which one of the following is not necessary for the parallel operation of Alternator ?

Question 6

According to the Thumb rule in overhead lines, which of the following statement is true?

Question 7

During the Thermal ionization of gas in circuit breaker, the molecules collides each other at a rate of

Question 8

Which of the following mode of operation of NPN transistor occurs when emitter is negative with respect the base?

Question 9

What is the SCR of synchronous machine when XS (saturated) is 1.4 pu

Question 10

Universal motors has wide and easily controllable speed range, typically of

Question 11

Which of the following is true regarding power factor?

Question 12

Which motor is used in electric traction system?

Question 13

If the input voltage, v(t) = 4 + 3sin(4t) + 2sin(5t) + 15sin(10t) & the current supplied by the source is i(t)= 7 + 2sin(4t) + 4sin(5t) + 10sin(15t).
Calculate the average power delivered by the source?

Question 14

Which among these is a configuration of an isolator?

I. Vertical break type

II. Horizontal type

III. Horizontal break with two post insulator

IV. Horizontal break centre post rotating double break

V. Pantograph type

Question 15

By what phase angle are the phases of a three-phase supply separated?

Question 16

In DC machines which one of the following neutralizes the armature cross flux under brush axis to improve commutation process in DC machines.

Question 17

If the field of the synchronous motor is under excited, the power factor will be

Question 18

In a circuit, Inductance L = 8 mH & Resistance R = 4 Ω, having a time constant T1 , If in place of one inductor four inductor of same value are connected in parallel & their combination in series with resistor of 4 ohm, then the new time constant of circuit is T2. Find the ratio of two-time constant T1/T2?

Question 19

For a certain dynamometer ammeter, the mutual inductance ‘M’ varies with the deflection θ as M = -6cos(θ + 30⁰) mH. Find the deflecting torque (in µNm) produced by a direct current of 50 mA corresponding to a deflection of 60⁰.

Question 20

The dead time of an instrument refers to
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