Computer Programming MCQs

5739 MCQs  (Page 212 of 574)

The objective of earthing or grounding is_______________?
A. To provide as low resistance possible to the ground
B. To provide as high resistance possible to the ground
C. To provide flow of positive, negative and zero sequence currents
D. None of the above
Factors on which soil resistance depends_______________?
A. Depth of the electrode
B. Mositure
C. Nacl
D. All the above
Generally grounding is provided for
A. Only for the safety of the equipment
B. Only for the safety of the operating personnel
C. Both (a) and (b)
D. None of the above
The size of the earth or ground wire is based on the______________?
A. Maximum fault current carrying through the ground wire
B. Rated current carrying capacity of the service line
C. Depends on the soil resistance
D. Both (a) and (c)
When an additional resistor is connected across an existing parallel circuit, the total resistance____________?
A. Remains the same
B. Decreases by the value of the added resistor
C. Increases by the value of the added resistor
D. Decreases
Three lights are connected in parallel across a 120 volt source. If one light burns out_____________?
A. The remaining two will glow dimmer
B. The remaining two will glow brighter
C. The remaining two will not light
D. The remaining two will glow with the same brightness as before