Electrical World

Q.1 A generating voltmeter is used to measure A. Impulse voltage B. AC voltage C. dc voltage D. All Answer : c Q.2 A series capacitance voltmeter can measure A. DC voltage B. Rms value voltage C. Ac voltage D. All Answer : c Must Read: Transformer Interview Questions Q.3 cvt when tunned does not have A. Ratio error B. Phase angle error C. Both a and b D. None Answer : b Q.4 Electrostatic voltmeter can measure A. Dc voltmeter B. Ac voltmeter C. Both a and b D. None Answer c Q.5 sphere gaps are used to measure A. Dc voltage B. Ac voltage C. Impulse voltage D. All Answer d Q.6 hall generators are normally used to measure A. Impulse voltage B. Unidirectional impulse current C. Any type of impulse voltage D. All Answer b Q.7 for measuring high impulse currents, the best type of shunt is A. Squirrel cage B. Bifilar strip C. Disc D. Coaxial tubular Answer d Don't Miss : Alternator Interview Questions Q.8 to measure a high voltage of peak...

1. Electrical conduction in gases was first studied in A. Loeb B. Maxwell C. Townsend D. None Answer : c Q.2 SF6 is a A. Natural gas B. Electronegative gas C. Ionize gas D. Non attaching gas Ans : b Must Read: Electrical Engineering Interview Questions Q.3 Minimum sparking potential of air is A. 40 v B. 100 v C. 4.4v D. 325v Answer : d Q.4 The requirement of gases for insulation purpose is A. High dielectric strength and thermal stability B. High thermal stability C. High dielectric strength only D. None Answer : A Q.5 Transformer oil is A. Askeral B. Silicone oil C. Polyster oil D. Mineral oil Answer: D Q.6 The breakdown strength of mineral oil is about A. 20kv/mm B. 30-40 kv/mm C. 50 kv/mm D. None Answer : B Q.7 Dielectric constant of mineral oil is A. 1.5 to 2.0 B. 2.2 to 2.4 C. 3.0 to 3.5 D. None Answer : b Q.8 maximum dielectric strength obtained with pureliquid A. 100 kv/mm B. 10 kv/mm C. 1mv/mm D. All Answer :a Q.9 which ...