41. What is the use of bourdon gauge ?
(^) To measure volume (B) 70 measure pressure
(C) To measure temperature (D) Allof these

42. Which of the following chemical substance are added to lubricating oil as anti-forming
additives ?
(^) Polyisobutane
(8) Polyalyenyl succinimides
(೮) Polyorganosiloxanes
0) Thiophosphoric acid

43. The bellows type thermostat valve fitted in cooling system is filled with

(^) Ethyl alcohol (B) Ethylene glycol
(C) Glycerine (D) Ethyl
44. Which of the following is NOT an example of anti freeze agent used in engine coolant ?
(^) Ethylene glycol (ए) Chloromethane
(C) Ethyl alcohol (D) Calcium chloride
45. The maximum permissible resistance to flow in an engine oil filter is about
(^) 0.5 bar (8) bar
(C) 2 bars (D) 4 bars

46. The vacuum valve inside the radiator pressure cap is usually set to operate when the
vacuum exceeds about

(A) 210% (B) 3kPa
(©) 5108 (D) 10kPa

47, When two metallic surfaces move over each other under direct contact the friction
produced is calle

(A) Viscous friction (B) Direct friction

(C) Boundary friction (D) 50110 friction

48. The minimum temperature at which oil gives off sufficient vapour to form combustible
mixture with air is known as

(^) Flash point (B) Fire point
(C) Combustion point (D) Pour point
49. Which lubrication system uses a separate oil tank ?
(A) Wet sump lubrication (B) Splash lubrication

(0) Petroil lubrication (D) Dry sump lubrication

50. Which of the following is NOT a component of an air intake system ?

(A)
(0)

066/2022 =

Turbo charger
nter cooler

(B) Air Compressor
(2) Intake manifold