LMRC JE 2018 Electrical: Mini Mock 2 for ESE & GATE EE Exams

Question 1

If

and

are the voltage gains of an amplifier without feedback and with negative voltage feedback respectively, then feedback fraction is……………..

Question 2

For the emitter follower circuit shown in Fig., the output impedance Z_out of the emitter follower circuit is

Question 3

The open loop control system is one in which control action__________.

Question 4

The full-load efficiency of an alternator …………… with the size of the machine.

Question 5

The current from the stator of an alternator is taken out to the external load circuit through

Question 6

An isolation transformer has primary to secondary turns ratio of

Question 7

A

single-phase transformer has, at full-load, a copper loss of 120 W. Iron loss is 84 W. What will be the efficiency of the transformer at half full-load at 0.8 p.f. lagging?

Question 8

A

d.c. shunt motor takes a total current of

Resistance of shunt field winding is

and that of armature is

What is the current in the armature?

Question 9

A uniform electric field and a uniform magnetic field are produced, pointed in the same direction. An electron is projected with its velocity pointed in the same direction, then,

Question 10

64 drops of radius r combine to form a bigger drop of radius R. The ratio of capacitances of bigger to smaller drop is

Question 11

A 50 V range voltmeter has a sensitivity of 20

The total resistance of the voltmeter is

Question 12

In the circuit shown in Fig., The voltmeter reads 4 V.

A voltmeter is used instead of ammeter. It is because

Question 13

A current of 3 + j 4 amperes is flowing through a circuit. The magnitude of current is …………………

Question 14

A load Z draws 12 kVA at a power factor of 0.856 lagging from a 120 V r.m.s. sinusoidal source. The peak current is

Question 15

The transient currents are due to ________.

Question 16

After closing the switch‘s’ at t = 0, the current i(t) in 'A' at any instant ‘t’ in the network shown in the figure:

Question 17

A factory draws an apparent power of 300 kVA at a p.f. of 0.65 lagging. What is the reactive power drawn at a p.f. of 0.85 lagging? Assume mechanical and thermal loads are fixed

Question 18

A man travels 10km per lane in a Z-shaped zigzag pattern lane. How much is the distance travelled in 5 Z’s and in which direction is he facing if he starts walking in north-east direction.

Question 19

Among four books, Book1 is twice as heavy as Book 2. Book 3's weight is half of Book 2's weight. Book 4 is 60 grams more as compared to Book 2 but 60 grams less as compared Book 1. Which book is heaviest?

Question 20

In a row of 16 boys, when Parvez was shifted by two places towards left, he became 7^th from the left end. What was his earlier position from the right end of the row?

Question 21

Looking at the advertisement I said, that man looks great on TV. The man is the only son of the only son of my grandfather. Whos the man?

Question 22

Kamal starts walking from his home facing west direction. After walking 10 km he takes a right turn and walks another 10 km. He takes another right turn and walks 10 km to reach his school. How far (in km) and in which direction is he from his home?

Question 23

Identify the diagram that best represents the relationship among the given classes.

Music Instrument, Piano, Guitar

Question 24

In a house party both mutton and meat were served. Some took only mutton and some only meat. There were some vegetarians who did not accept either. The rest accepted both mutton and meat.
Which of the following logic diagram correctly represents this situation?

Question 25

Which answer figure will complete the pattern in the question figure?