31- Ignition quality of gasoline fuel is expressed by
(A) Octane number
(B) Cetane number
(C) Specific gravity
(D) Heat value
32- Pre-ignition is defined as
(A) Ignition of charge in inlet manifold
(B) Ignition of the end charge
(C) Ignition of the charge prior to the passage of the spark
(D) Ignition of the charge after passage of spark
33- The unit of brake power is
(A) Kilo newton meter
(B) Kilo pascal
(C) Kilo watt
(D) Kilo newton
34- If the intake air temperature of IC engine increases its efficiency will
(A) remain same
(B) increase
(C) decrease
(D) none of the above
35- Which of the following is not a primary contributor to the greenhouse effect?
(A) methane gas
(B) chlorofluorocarbons
(C) carbon monoxide
(D) carbon dioxide
36- Abbreviation HEVs stands for
(A) Highly Engineered Vehicles
(B) Highly Economic Vehicles
(C) Hybrid Electric Vehicles
(D) Highly Efficient Vehicles
37- The angle between two cylinders in a two cylinder V-type engine is usually
(A) 90 degrees
(B) 60 degrees
(C) 45 degrees
(D) 15 degrees
38- The torque developed by engine is maximum at
(A) maximum power speed of engine
(B) minimum speed of engine
(C) maximum volumetric efficiency speed of engine
(D) maximum speed of engine
39- Petrol that detonates easily is called
(A) Blended fuel
(B) Unleaded petrol
(C) Low octane petrol
(D) High octane petrol
40- An overinflated tire will wear the tread most near the
(A) centre
(B) edges
(C) corner
(D) none of the above
41- Petrol engines are usually not supercharged as that results in
(A) increased knocking
(B) drop in volumetric efficiency
(C) increased specific fuel consumption
(D) power loss
42- The freezing temperature of ordinary petrol is
(A) 10 degree Celsius
(B) 0 degree Celsius
(C) -5 to -10 degree Celsius
(D) -30 to -50 degree Celsius
ANSWERS:
31-(A), 32-(C), 33-(C), 34-(C), 35-(C), 36-(C), 37-(B), 38-(B), 39-(D), 40-(A), 41-(A), 42-(D)