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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
Question 7
In Fig., the resonant frequency is
Question 8
In the circuit shown in Fig., if Q of the coil is 5, the phase angle between and is
Question 9
In the circuit shown in Fig., if the circuit will be
Question 10
In the circuit shown in Fig., if the angle between and is
Question 11
In the circuit shown in Fig., what will be the Q of the inductor with and
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?
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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ESE & GATE EEGeneralJun 23ESE & GATE EE