51. The output of a diesel engine can be increased without increasing the engine revolution or size in following way
(A) feeding more fuel
(B) increasing flywheel size
(C) scavenging
(D) supercharging
Answer: - supercharging
52. As a result of detonation in an I.C. engine, following parameter attains very high value
(A) peak pressure
(B) rate of rise of pressure
(C) rate of rise of temperature
(D) peak temperature
Answer: - rate of rise of pressure
53. Most high speed compression engines operate on
(A) Diesel cycle
(B) Otto cycle
(C) Dual combustion cycle
(D) Special type of air cycle
Answer: - Dual combustion cycle
54. Fuel formed under the earth’s surface by the decomposition of organic matter is called
(A) organic fuel
(B) biogas
(C) fossil fuel
(D) underground fuel
Answer: - fossil fuel
55. The accumulation of carbon in a cylinder results in increase of
(A) clearance volume
(B) volumetric efficiency
(C) ignition time
(D) effective compression ratio
Answer: - effective compression ratio
056. Which of the following medium is compressed in a Diesel engine cylinder?
(A) air alone
(B) air and fuel
(C) air and lub oil
(D) fuel alone
Answer: - air alone
57. The air-fuel ratio of the petrol engine is controlled by
(A) fuel pump
(B) governor
(C) injector
(D) carburetor
Answer: - carburetor
58. Diesel fuel, compared to petrol is
(A) less difficult to ignite
(B) just about the same difficult to ignite
(C) more difficult to ignite
(D) highly ignitable
Answer: - more difficult to ignite
59. A 75 CC engine has following parameter as 75 CC
(A) fuel tank capacity
(B) lub oil capacity
(C) swept volume
(D) cylinder volume
Answer: - swept volume
60. Engine pistons are usually made of aluminum alloy because it
(A) is lighter
(B) wears less
(C) absorbs shocks
(D) is stronger
Answer: - is lighter
No comments:
Post a Comment