34,

35,

36,

37.

38,

39,

40.

41.

Creeping in an energy meter occurs when

(^) Only Pressure coil is energized

(B) Only Current coil is energized

(ಲ) Both Pressure coil and Current coil are energized

(D) Both Pressure coil and Current coil are not energized

An energy meter was tested in a laboratory by phantom loading method with a resistive load
and by providing a balanced 3 phase supply. The current coil is connected in the R phase
and the pressure coil is connected across R phase and B phase. What would be the power
factor under test ?

4) Upf ൫ 0515 ८) 0.866 1086 (D) 0.866 lag
7 g

Schering bridge is used for measuring unknown
(ಹ) Resistance (8) Inductance (~) Capacitance (D) Impedance

LVDT is used for measurement of
(ಹ) Velocity (8) Pressure (ಲ) Tension (D) Displacement

All joints in earthing conductors shall be properly tinned because, Tin offers
(ಹ) Corrosion protection (8) Solderability
(ಲ) A better contact surface (D) All of these

Which one of the following is used to reduce water hammer effect in Hydro Electric Power
Plants ?

ಹಿ) Surge Tank (8) Butterfly valve
86 Y
(ಲ) Globe valve (D) Spill way

A generating station has a connected load of 50 MW and a maximum demand of 20 MW.
No. of units generated is 60 MWhr for the year. What is the Demand factor ?

(ಹ) 0.33 ‏بی‎ 0.4 © 25 o 3

In an ac transmission system the receiving end voltage is found to be more than the sending
end voltage. This phenomenon is called

(ಹ) Harmonics (8) Ferranti effect (ಲ) Corona (D) ടിന effect

7 029/2018
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