Category: I.C. Engines

A. high heat value
B. low heat value
C. net calorific value
D. middle heat value
E. calorific value

A. suction port and exhaust port
B. transfer port only
C. suction port and transfer port
D. transfer port and exhaust port
E. suction port, exhaust port and transfer port

A. using additives in the fuel
B. engine derating i.e. reducing the maxi-mum flow of fuel
C. increasing the compression ratio
D. adherence to proper fuel specification
E. avoidance of overloading

A. increase
B. decrease
C. be independent
D. may increase or decrease depending on other factors
E. none of the above

A. air used for combustion sent under pres-sure
B. forced air for cooling cylinder
C. burnt air containing products of combustion
D. air used for forcing burnt gases out of engine’s cylinder during the exhaust period
E. air fuel mixture

A. compression ring
B. oil ring
C. scrapper ring
D. groove ring
E. leading ring

A. octane number
B. cetane number
C. calorific value
D. carbon content
E. ignition temperature

A. 1-2-3-4
B. 1-3-2-4
C. 1-4-2-3
D. 1-2-4-3
E. 1-3-4-

A. compression starts at 35° after bottom dead center and ends at top dead center
B. compression starts at bottom dead center and ends at top dead center
C. compression starts at 10° before bottom dead center and, ends just before top dead center
D. may start and end anywhere
E. none of the above

A. instantaneous auto-ignition of last part of charge to be burnt
B. improper mixing of air and fuel
C. improper combustion
D. self ignition temperature has nothing to do with detonation
E. none of the above