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LMRC JE 2018 EE: Practice Quiz 21

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Question 1

The three non-indcutive loads of 5 kW, 3 kW and 2 kW are connected in a star network between R, Y and B phases and neutral. The line voltage is 400 V. The current in the neutral wire is nearly

Question 2

In active region operation of a transistor:

Question 3

A Y-connected

alternator is adjusted to its rated line-to-line voltage of 230 V while under its rated load and at 80% lagging power factor. The same field excitation current result in a no-load line-to-line voltage of 328.6 V. The voltage regulation is

Question 4

Find the total number of strands in a ACSR conductor if the given number of layers is 5

Question 5

A 3-phase, 16-pole alternator has a star connected winding with 144 slots and 10 conductors per slot. The flux per pole is 30 mWb sinusoidally distributed and the speed is 375 r.p.m. The line e.m.f. is

Question 6

A generator produces 100 kW of power at a potential difference of 10 kV. The power is transmitted through cables of total resistance

. What is power loss in cables?

Question 7

A 200 V, 50 Hz inductive circuit takes a current of 10A, lagging 30 º. The inductive reactance of the circuit is …………………

Question 8

The formula for Surge impedance for loss less line when r=0 and g=0 is

Question 9

One heater coil boils certain amount of water in 10 minutes and another heater coil in 15 minutes. In how much time the same water will be boiled if the two heaters are put in series?

Question 10

The polarization in a solid dielectric is related to the electric field

and the electric flux density

according to which one of the following equations?

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ESE & GATE EE General

Jun 8ESE & GATE EE