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JE 2019 || Day 38 || Combined Syllabus Quiz 2

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Question 1

The conductors used for transmitting power must have following characteristics.

Question 2

Which of the following applications needs frequent starting and stopping of electric motor ?

Question 3

When the length of a cable increases, its capacitance

Question 4

The charging current drawn by the cable

Question 5

In a string of suspension insulators, if shunt capacitance decreases, then string efficiency

Question 6

If the supply frequency of the circuit in Fig. is increased, the circuit power factor will
Description: E:\Gate\SSC JE Electrical New Files-Done\14_Parallel-AC-Circuits_files\image126.png

Question 7

In Fig., the resonant frequency is
Description: E:\Gate\SSC JE Electrical New Files-Done\14_Parallel-AC-Circuits_files\image127.png

Question 8

In the circuit shown in Fig., if Q of the coil is 5, the phase angle between Description: E:\Gate\SSC JE Electrical New Files-Done\14_Parallel-AC-Circuits_files\image165.png and Description: E:\Gate\SSC JE Electrical New Files-Done\14_Parallel-AC-Circuits_files\image051.png is
Description: E:\Gate\SSC JE Electrical New Files-Done\14_Parallel-AC-Circuits_files\image166.png

Question 9

In the circuit shown in Fig., if Description: E:\Gate\SSC JE Electrical New Files-Done\14_Parallel-AC-Circuits_files\image172.png the circuit will be
Description: E:\Gate\SSC JE Electrical New Files-Done\14_Parallel-AC-Circuits_files\image173.png

Question 10

In the circuit shown in Fig., if Description: E:\Gate\SSC JE Electrical New Files-Done\14_Parallel-AC-Circuits_files\image187.png the angle between and is
Description: E:\Gate\SSC JE Electrical New Files-Done\14_Parallel-AC-Circuits_files\image188.png

Question 11

In the circuit shown in Fig., what will be the Q of the inductor with Description: E:\Gate\SSC JE Electrical New Files-Done\14_Parallel-AC-Circuits_files\image194.png Description: E:\Gate\SSC JE Electrical New Files-Done\14_Parallel-AC-Circuits_files\image195.png and Description: E:\Gate\SSC JE Electrical New Files-Done\14_Parallel-AC-Circuits_files\image196.png
Description: E:\Gate\SSC JE Electrical New Files-Done\14_Parallel-AC-Circuits_files\image188.png

Question 12

A 20 200 mV meter movement is used to make a 25 V voltmeter. What is the sensitivity of the meter?

Question 13

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 14

In the circuit shown in Figure.

What is the voltage across R2 with voltmeter connected in the circuit?

Question 15

A moving coil voltmeter gives full-scale deflection of 100 V for a meter current of 1 mA. For 45 V reading, the meter current will be ………………….

Question 16

A vacuum cleaner employs _______motor.

Question 17

Which of the following single phase motors is available with speed as low as one revolution per minute ?

Question 18

In a 3 – phase induction motor crawling happens at

Question 19

A 18.65 kW, 220 V, 50 Hz, 4-pole, y-connected synchronous motor is running with a light load. The load angle is 4o (elect.) and back e.m.f. generated per phase in 110 V. If the armature resistance per phase is 0.1 ohm and synchronous reactance/ phase is 1.5 ohm the power input to the motor is ……………….

Question 20

A 208 V, 45 kVA, 0.8 p.f. leading, connected, 60 Hz synchronous motor has a synchronous reactance of and negligible armature resistance. Its friction and windage losses are 1.5 kW and its core losses are 1 kW. Initially, the shaft is supplying a 15 h.p. load and the motors p.f. is 0.8 leading. The electric power supplied to the motor is
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Jun 23ESE & GATE EE