National Level Online Quiz On Electrical Measurement Quiz

Electrical Measurement Quiz

 Question : The inductance of the current coil of watt meter is kept 

Answer : As low as possible

 

Question : The potential coil of watt meter is designed for 

Answer : Very low inductance

 

Question : If the instrument scale is cramped for large values, then the scale is calibrated as per 

Answer : Logarithmic scale law

 

Question : Which of the method will be used for precision measurement of resistance 

Answer : Bridge method

 

Question : CT is used to 

Answer : Step down the current

 

Question : Which of the following instrument has poor overload capacity? 

Answer : Hot wire instruments

 

Question : The resolution of a digital ammeter with 3 digit display is 

Answer : 1/1000

 

Question : How many coils are required in the megger? 

Answer : Three

 

Question : Which of the following instrument will have same calibration on A.C. and D.C.? 

Answer : Electrodynamometer instruments

 

Question : A Voltmeter should have 

Answer : Very high resistance

 

Question : The internal resistance of an ammeter should be 

Answer : Very small resistance

 

Question : Which of the methods can be used to measure the unbalance load of three-phase system? 

Answer : Two wattmeter method

 

Question : The watt meter is connected in the three phase balanced circuit such that current coil inserted in one line conductor and voltage coil across other two. The watt meter will indicate 

Answer :  (b) or (c)

 

Question : The breakdown of the insulation of the cable will be termed as 

Answer : Earth fault

 

Question : The power factor meter has 

Answer : Current and voltage coils both

 

Question : The primary winding of CT has 

Answer : Thicker wire than secondary winding

 

Question : Two voltmeters each with the range of 0-100 V and resistances 40,000 Ω and 10,000 Ω respectively are connected in series across the power supply source of 50 V. The voltmeters will indicate 

Answer : 40 V, 10 V respectively

 

Question : Which of the following transformers have secondary current of same order as magnetizing current? 

Answer : Voltage transformer

 

Question : In the moving iron instruments, the torque is proportional to 

Answer : Inductance of instruments

 

Question : Which of the following instruments can be used to measure only A.C. currents? 

Answer : Induction type instruments