The commonly used material in the thermostat to control the movement of the valve, according to the coolant temperature is
A. Wax
B. Rubber
C. Bimetal
D. Thermistor
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On the basis of dissipating heat, the cooling systems are/is-
A. Air cooling system
B. Water cooling system
C. Both are correct
D. None of these
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The type of radiator when the water flows from top to bottom is-
A. Down flow type radiator
B. Cross flow type radiator
C. Both are correct
D. None of these
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In case of liquid lubricants. Generally
A. Flash point is higher than the fire point
B. Fire point is higher than the flash point
C. Fire point is lower than the flash paint
D. Flash and fire point are identical
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Main operation of coolant on machine tool
A. To save the machine tool from heating
B. To cool the parts of machine
C. To wet the two mating parts
D. To minimize the friction between two machine parts
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Advantages of Lubrication is/are-
A. Reduces wear of parts
B. Absorbs heat
C. Clean and flushes the moving part
D. All are correct
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If the total fuel energy is 100 units; then fuel energy used for useful work is-
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Radiator core consists of number of small . . . . . . . . pipes fixed in the fins.
A. Brass
B. Copper
C. Steel
D. Iron
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The engine oil pressure test is performed when
A. The oil pressure warning switch turns on while the ignition is at the ON position and the engine is not running
B. The oil pressure warning switch does not turn on while the ignition is at the ON position and the engine is not running
C. The oil pressure warning switch comes on while the engine is running
D. The oil pressure switch does not come on while the engine is running
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The valves inside the radiator cap regulate the pressure in the cooling system, thereby preventing damage to the system's pipe and other components.
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Which is correct?
A. A metal having lower conductivity dissipates more amount of heat
B. A metal having higher conductivity dissipates more amount of heat
C. Both are correct
D. None of these
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The function of a lubrication system is
A. To reduce friction and wear
B. To cool the engine by carrying away the heat
C. To cushion the parts against vibration and sudden impact of load
D. All of the above
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The general ratio of soluble oil and water used as coolant is
A. 10 : 1
B. 1 : 10
C. 1 : 20
D. 20 : 1
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The main advantage of the pump circulation system is
A. Positive circulation of cooling water
B. No need to place the radiator header tank above the engine level
C. No need to place the radiator on the front
D. All of the above
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Which of the following prevent large impurities from entering the engine?
A. Oil filter
B. Oil pump
C. Oil control orifice
D. Oil strainer
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Which of the following component is fitted in the oil pan to prevent the oil from splashing when it is subjected to vibration and other movement during vehicle operation.
A. Baffle plate
B. Drain bolt
C. Oil strainer
D. Oil filter
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High pressure produces-
A. High frictional forces
B. Low frictional forces
C. Very low frictional force
D. None of these
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Which is a type of temperature indicators?
A. Mechanical type
B. Electric type
C. Both
D. None
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The oil pressure may be low due to the reason-
A. Less oil in the oil pan
B. Loose connection in the oil lines
C. Too weak relief valve spring
D. All are correct
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Which of the following statements is correct regarding water cooled type engine oil cooler?
A. The cooler is positioned such that air flows over it during vehicle movement and this air flow cools the engine oil
B. The cooler is fitted insider the radiator
C. The cooler is located at the base of the oil filter and it cools the engine oil using the air flow that occurs during vehicle movement
D. The cooler is located at the base of the oil filter and the engine oil is cooled by the engine coolant that circulates through the cooler
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