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MCQs 1: Throwing power is the ability of the electrolyte to produce

Uniform deposit on an article of regular shape Uniform deposit on an article of irregular shape Non - uniform deposit on an article of regular shape Non - uniform deposit on an article of irregular shape
Answer Explanation

MCQs 2: Reduction factor of a source of light is the ratio of its

Mean horizontal candle power to the mean spherical candle power Mean spherical candle power to the mean horizontal candle power Maximum horizontal candle power to the mean spherical candle power Mean spherical horizontal candle power to the maximum spherical candle power
Answer Explanation

MCQs 3: According to second law of illumination, the illumination at any point on an inclined surface is

Directly proportional to the cosine of the angle between the normal to the surface at that point Directly proportional to the sin of the angle between the normal to the surface at that point Directly proportional to the tan of the angle between the normal to the surface at that point Directly proportional to the cot of the angle between the normal to the surface at that point
Answer Explanation

MCQs 4: According to the first law of illumination, the illumination of a surface due to a source of light is

Inversely proportional to the distance between the surface and the source of light Inversely proportional to the square of the distance between the surface and the source of light Directly proportional to the distance between the surface and the source of light Directly proportional to the square of the distance between the surface and the source of light
Answer Explanation

MCQs 5: The polar curves are used to find out the

MHCP MSCP Both (a) and (b) None of these
Answer Explanation

MCQs 6: The artificial source of light is

Arc lamp Incandescent lamp Discharge lamp All of these
Answer Explanation

MCQs 7: Nitrogen is added with the argon in an incandescent lamp to

Reduce the temperature Reduce the possibility of arcing Increase the brightness Increase the efficiency
Answer Explanation

MCQs 8: The inside wall of fluorescent tube is coated with

Sulphur powder Phosphor powder Sodium Krypton
Answer Explanation

MCQs 9: In internal combustion engine drive, a gear box is

Required for controlling the torque Required for controlling the speed Required for controlling both speed and torque Not required
Answer Explanation

MCQs 10: In diesel electric drive,

A diesel engine drives an ac generator Haulage capacity is less Regenerative braking cannot be used All of these
Answer Explanation

MCQs 11: For running at half of the maximum speed, the batteries of battery electric drive are connected in

Parallel Series Series - parallel Drive cannot run at this speed
Answer Explanation

MCQs 12: In tramways,

Two drum controllers are employed in series Two drum controllers are employed in parallel Only one drum controller is employed Three drum controller are employed either in parallel or series
Answer Explanation

MCQs 13: In mail line train services, the

Acceleration and braking periods are long Acceleration and braking periods are short Free run and coasting periods are long Both (b) and (c)
Answer Explanation

MCQs 14: The ratio of the distance between any two stops and the sum of the time of run and the time of stop at one station is known as

Crest speed Average speed Maximum speed Scheduled speed
Answer Explanation

MCQs 15: The scheduled speed of a train can be increased by

Increasing the acceleration and retardation Increasing the crest speed Decreasing the duration of stop All of these
Answer Explanation

MCQs 16: Which among the following is mechanical braking?

Pneumatic braking Plugging Dynamic braking Regenerative braking
Answer Explanation

MCQs 17: During plugging, the speed of the motor gradually decreases. If the supply to the motor is not cut - off then the

Motor will continue to rotate in the same direction Motor will continue to rotate in the reverse direction Motor will come to rest None of these
Answer Explanation

MCQs 18: In case of dc series motor, the torque can be found from

Only magnetization curve Only demagnetization curve Both (a) and (b) None of these
Answer Explanation

MCQs 19: For regenerative braking, the motor which is not suitable is

DC shunt motor DC compound motor DC deries motor AC shunt motor
Answer Explanation

MCQs 20: The heat required by the weld is produced due to the contact resistance between the two pieces and is

Directly proportional to the current Directly proportional to the square of the current Inversely proportional to the square of the current Inversely proportional to the current
Answer Explanation

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