Question19:-Which of the following country introduced the Environment tax from January 2018, to prevent pollution?
A:Japan
B:-America
C:-China
D:-Australia
Correct Answer:- Option-C
Question20:-The 'Statue of Unity' world's tallest statue is located in which district of Gujrat
A:-Ahmedabad
B:-Rajkot
C:-Gandhinagar
D:-Narmada
Correct Answer:- Option-D
Question21:-Name the engine component that ‘carries’ the engine over its non-working strokes
A:-Piston
B:-Crank shaft
C:-Flywheel
D:-Connecting rod
Correct Answer:- Option-C
Question22:-The purpose of piston ring is to control
A:-combustion pressure
8:- consumption
C:-cylinder wall lubrication
D:-all of the above
Correct Answer:- Option-D
Question23:-0On the rear end of the crank shaft we mount
A:-timing gear
B:-flywheel
C:-counter weight
D:-fan pulley
Correct Answer:- Option-B
Question24:-The engine valves are closed by
A:-cam shaft
B:-crank shaft
C:-timing gear
D:-valve spring
Correct Answer:- Option-D
Question25:-Cam shaft of an engine is always mounted
A:-perpendicular to the crank shaft
B:-parallel to the crank shaft
C:-inclined to the crank shaft
D:-any one of the above
Correct Answer:- Option-B
Question26:-Air-fuel ratio changes according to the operating conditions like
A:-speed
B:-load
C:-speed and load
D:-speed, load and temperature
Correct Answer:- Option-D
Question27:-Lean air-fuel mixture is required for

C:-acceleration
D:-cruising
Correct Answer:- Option-D
Question28:-The centrifugal advance mechanism provide ignition advance proportional to
A:-engine load
B:-engine speed
C:-both 1 8೧6 2
D:-none of the above