Questions and Answers Section 16

Questions and Answers

Question :

51.If the engine coolant leaks into the engine oil, then engine oil

Show Answer

appears milky

Question :

52.The function of an alternator in an automobile is to

Show Answer

continually recharge the battery

Question :

53.The size of engine cylinder is referred in terms of its

Show Answer

bore and stroke

Question :

54.The number of exhaust manifolds in a V-6 engine are

Show Answer

two

Questions and Answers Section 15

Questions and Answers

Question :

41.The purpose of a thermostat in an engine cooling system is to

Show Answer

allow the engine to warm up quickly

Question :

42.The petrol engine works on

Show Answer

Otto cycle

Question :

43.The reconditioning process used to give cylinder bore surfaces a crosshatch pattern, is known as

Show Answer

honing

Question :

44.The ease with which petrol vaporizes is called its

Show Answer

volatility

Note:-volatility means tendency of a substance to evaporate at normal temperatures.

Question :

45.The included angle is the sum of the

Show Answer

camber and S.A.I.

Question :

46.The lubrication oil flow in an engine is in the order as

Show Answer

oil strainer- oil pump - relief valve - oil filter - cylinder block cylinder head - oil pan

Question :

47.A three way catalytic converter

Show Answer

removes CO, HC, and NO2 from the exhaust gasses passing through it

Question :

48.The valve overlap in four stroke petrol engines is approximately

Show Answer

30°

Question :

49.The petrol engines are also known as

Show Answer

spark ignition (S.I.) engines

Question :

50.Which of the following indicates a multigrade oil ?

Show Answer

SAE 20 W-50

Note:-Oils can be separated into multigrade oils and monograde oils. Multigrade oils must fulfill two viscosity specifications, their viscosity grade consists of two numbers, e.g. 10W-40: 10W refers to the low-temperature viscosity ("Winter"), 40 refersto the high-temperature viscosity ("Summer").

Questions and Answers Section 14

Questions and Answers

Question :

31.The temperature indicating instrument in vehicles indicates the temperature of

Show Answer

jacket cooling water

Note:-A water jacket is a water-filled casing surrounding a device, typically a metal sheath having intake and outlet vents to allow water to be pumped through and circulated. The flow of water to an external heating or cooling device allows precise temperature control of the device.

Question :

32.The process of supplying the intake air to the engine cylinder at a pressure greater than the pressure of the surrounding atmosphere is known as

Show Answer

supercharging

Question :

33.In aluminum cylinder blocks, the cylinder liners are made of

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cast iron

Question :

34.The device for smoothening out the power impulses from the engine is called

Show Answer

flywheel

Note:-a heavy revolving wheel in a machine which is used to increase the machine's momentum and thereby provide greater stability or a reserve of available power.

Question :

35.In case of a Diesel car, the pressure at the end of compression is of the order of

Show Answer

45 bar

Question :

36.The connecting rod is attached to the piston by the

Show Answer

piston pin

Question :

37.In a Diesel engine, the function of a fuel injector is to

Show Answer

spray atomized fuel in the cylinder

Question :

38.The firing order for an opposed four cylinder l.C. engine is

Show Answer

1-4-3-2.

Note:-Firing order. The firing order is the sequence of power delivery of each cylinder in a multi-cylinder reciprocating engine. This is achieved by sparking of the spark plugs in a gasoline engine in the correct order, or by the sequence of fuel injection in a Diesel engine.

Question :

39.The two kinds of piston rings are

Show Answer

compression and oil-control rings.

Question :

40.The heat transfer from coolant to air in the radiator of an automobile engine takes place by

Show Answer

convection and radiation

Note:-Convection is the heat transfer due to bulk movement of molecules within fluids such as gases and liquids, including molten rock. Convection takes place through advection, diffusion or both.

In physics, radiation is the emission or transmission of energy in the form of waves or particles through space or through a material medium.

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Monday, November 26, 2018

Questions and Answers Section 16

51.If the engine coolant leaks into the engine oil, then engine oil

appears milky

52.The function of an alternator in an automobile is to

continually recharge the battery

53.The size of engine cylinder is referred in terms of its

54.The number of exhaust manifolds in a V-6 engine are

two

Questions and Answers Section 15

41.The purpose of a thermostat in an engine cooling system is to

allow the engine to warm up quickly

42.The petrol engine works on

Otto cycle

43.The reconditioning process used to give cylinder bore surfaces a crosshatch pattern, is known as

honing

44.The ease with which petrol vaporizes is called its

volatility

Note:-volatility means tendency of a substance to evaporate at normal temperatures.

45.The included angle is the sum of the

camber and S.A.I.

46.The lubrication oil flow in an engine is in the order as

oil strainer- oil pump - relief valve - oil filter - cylinder block cylinder head - oil pan

47.A three way catalytic converter

removes CO, HC, and NO2 from the exhaust gasses passing through it

48.The valve overlap in four stroke petrol engines is approximately

30°

49.The petrol engines are also known as

spark ignition (S.I.) engines

50.Which of the following indicates a multigrade oil ?

SAE 20 W-50

Note:-Oils can be separated into multigrade oils and monograde oils. Multigrade oils must fulfill two viscosity specifications, their viscosity grade consists of two numbers, e.g. 10W-40: 10W refers to the low-temperature viscosity ("Winter"), 40 refersto the high-temperature viscosity ("Summer").

Questions and Answers Section 14

31.The temperature indicating instrument in vehicles indicates the temperature of

jacket cooling water

Note:-A water jacket is a water-filled casing surrounding a device, typically a metal sheath having intake and outlet vents to allow water to be pumped through and circulated. The flow of water to an external heating or cooling device allows precise temperature control of the device.

32.The process of supplying the intake air to the engine cylinder at a pressure greater than the pressure of the surrounding atmosphere is known as

supercharging

33.In aluminum cylinder blocks, the cylinder liners are made of

cast iron

34.The device for smoothening out the power impulses from the engine is called

flywheel

Note:-a heavy revolving wheel in a machine which is used to increase the machine's momentum and thereby provide greater stability or a reserve of available power.

35.In case of a Diesel car, the pressure at the end of compression is of the order of

45 bar

36.The connecting rod is attached to the piston by the

piston pin

37.In a Diesel engine, the function of a fuel injector is to

spray atomized fuel in the cylinder

38.The firing order for an opposed four cylinder l.C. engine is

1-4-3-2.

Note:-Firing order. The firing order is the sequence of power delivery of each cylinder in a multi-cylinder reciprocating engine. This is achieved by sparking of the spark plugs in a gasoline engine in the correct order, or by the sequence of fuel injection in a Diesel engine.

39.The two kinds of piston rings are

compression and oil-control rings.

40.The heat transfer from coolant to air in the radiator of an automobile engine takes place by

convection and radiation

Note:-Convection is the heat transfer due to bulk movement of molecules within fluids such as gases and liquids, including molten rock. Convection takes place through advection, diffusion or both.

In physics, radiation is the emission or transmission of energy in the form of waves or particles through space or through a material medium.

Idioms mcq For Competitive Exams