=
52. One lumen/M2 =
A) One lux B) Coulomb C) One candela D) One foot candle
53. The fuse in DC circuit is inserted in
A) Negative line only B) Positive line only
C) Both negative and positive lines D) Either negative or Positive line
54. The unit of solid angle is
A) Lumen B) Lux C) Degree D) Steradian
55, Carbon arc lamps are commonly used in
A) Street lighting B) Cinema hall lighting
C) Cinema projector D) Domestic lighting
56. The HRC fuses are standardized for rated current up to Ampere,
A) 500 B) 1000 C) 1250 D) 2500
57. Current rating of 1.5 mm? single core copper wire is Amps.
A) 5 B) 10 C) 15 D) 20
58. The earth resistance of a domestic wiring i
A) Less than 5 ohms B) More than 5 ohms
C) Zero ohms D) None of the above
59. The action of a fuse is based on the effect of the electric current.
A) Magnetic 8) Heating C) Chemical D) None of the above
60. To improving the efficiency of earthing by
A) Increase the pipe or plate area B) Increase the depth of the earth pit
C) Installing parallel electrodes D) All of the above
61. Which Of the following statements is/are true regarding the functions of yoke ina

dc machine ?
i. It provides path for the pole flux.
ii. It provides mechanical Support to the machine.
iii. It helps to convert the AG EMF to DC.
iv. It helps in reducing the armature reaction effect.
A) Only i and ii 8) Only i, ii and iii
©) Only i and iv 0) Only ii, ॥ and iv