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AE-JE Foundation EE : Electrical & Electronic Measurements QUIZ - 2

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Question 1

A single-phase energy meter operates at 220V, 50 Hz supply with a load of 30 A for 3 hours at unity power factor. The meter makes 5,940 revolutions in that period. The meter constant is?

Question 2

Phantom loading in an energy meter is used because

Question 3

Which of the following is the most commonly used measurement unit for a typical 1-phase energy meter?

Question 4

Creeping in a 1-ϕ Induction type energy meter may be due to

Question 5

The Compensating coil in the wattmeter is connected

Question 6

In a two-wattmeter method which is used to measure power in a 3-phase circuit. If the true power is 2000 W, while the meter measure it 2050 watt. Calculate the percentage error in reading of wattmeter?

Question 7

A 5A PMMC meter with an internal resistance of 10 ohm is to be used as a DC voltmeter for range of 500 V. What will be the multiplying factor for the satisfactory operation ?

Question 8

The value of resistance to be added in series with an ammeter whose full scale deflection is of 0.1 mA and internal resistance is of 500 Ω, to make it suitable to measure (0 – 10) V is

Question 9

If 3-phase power is measured with the help of two-wattmeter method in a balanced load with the application of 3-phase balanced voltage, variation in readings of wattmeters will depend on

Question 10

Electrodynamometer-type wattmeter’s have a construction where

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Oct 13AE & JE Exams