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MCQs 1: The efficiency of heating is more for

Solid fuels Oil heating Gas heating Electric heating
Answer Explanation

MCQs 2: The heat can be transferred from high temperature body to low temperature body by

Conduction method Convection method Radiation method All of these
Answer Explanation

MCQs 3: Heat in water and air is transferred by

Conduction Convection Radiation Either conduction or convection
Answer Explanation

MCQs 4: In induction heating, the heat produced is

Directly proportional to the induced voltage and inversely proportional to the resistance Inversely proportional to the induced voltage and directly proportional to the resistance Directly proportional to the square of induced voltage and inversely proportional to the resistance Inversely proportional to the square of induced voltage and directly proportional to the resistance
Answer Explanation

MCQs 5: The core type induction furnace and the coreless type induction furnace are

Low frequency, high frequency Low frequency, low frequency High frequency, high frequency High frequency, low frequency
Answer Explanation

MCQs 6: In direct core type induction furnaces, the leakage reactance of the magnetic circuit is

High and power factor is also high Low and power factor is high High and power factor is low Low and power factor is also low
Answer Explanation

MCQs 7: When sulfate molecules reacts with the water then

Hydrogen is liberated Oxygen is liberated Sulphurdioxide is formed All of these
Answer Explanation

MCQs 8: According to the Faraday’s first laws of electrolysis, the mass of substance liberated during electrolysis is

Directly proportional to the current flowing through the electrolyte Directly proportional to time for which current flows Directly proportional to the charge Only (a) and (b)
Answer Explanation

MCQs 9: The current efficiency is defined as the ratio of

Actual quantity of the substance deposited to the theoretical quantity of the substance deposited Actual quantity of the substance deposited to the theoretical quantity of the substance liberated Theoretical quantity of the substance deposited to the actual quantity of the substance deposited Theoretical quantity of the substance deposited to the actual quantity of the substance liberated
Answer Explanation

MCQs 10: With increase in temperature of the body, the emission of light waves is

Increases Decreases Remains same None of these
Answer Explanation

MCQs 11: The range of visible radiation lies between

2000 angstrom to 2500 angstrom 4000 angstrom to 4500 angstrom 5000 angstrom to 6000 angstrom 4000 angstrom to 7500 angstrom
Answer Explanation

MCQs 12: Lux is the unit of

Luminous flux Luminous intensity Illumination Luminance
Answer Explanation

MCQs 13: The illumination due to good daylight is approximately equal to

100 lux 200 lux 300 lux 400 lux
Answer Explanation

MCQs 14: The suitable lamps for street lighting are

Mercury vapour lamps Sodium discharge lamps Both (a) and (b) None of these
Answer Explanation

MCQs 15: Flood lighting is used for

For enhancing the beauty of building at nights For illuminating sports stadium For illuminating show cases All of these
Answer Explanation

MCQs 16: The glare can be reduced by

Decreasing the height of bright light sources Using glossy surfaces for bench tops Using reflectors to the bright sources All of these
Answer Explanation

MCQs 17: The propulsion of heavy vehicle is called

Illumination Electric movement Electric traction Hybrid vehicle
Answer Explanation

MCQs 18: The steam engine drive and electric traction drive

Both uses electricity for its operation Former do not use electricity at any stage of its operation and later uses electricity for its operation Former uses electricity for its operation and the later one do not use electricity for its operation Both do not use electricity at any stage for its operation
Answer Explanation

MCQs 19: The haulage capacity is more for

Steam engine system Internal combustion engine drive Battery electric drive None of these
Answer Explanation

MCQs 20: The slope of the speed - time curve at any point gives the

Acceleration of the train at that point of time Retardation of the train at that point of time Distance travelled by the train Either (a) or (b)
Answer Explanation

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