As a result of detonation in an I.C. engine, following parameter attains very high value _____________________?

A. spark
B. injected fuel
C. heat resulting from compressing air that is supplied for combustion
D. ignition
E. combustion chamber

A. clearance volume
B. volumetric efficiency
C. ignition time
D. effective compression ratio
E. valve travel time.

A. increase the knocking tendency
B. decrease the knocking tendency
C. not affect the knocking tendency
D. increase or decrease knocking tendency depending on strength and time of spark
E. unpredictable

A. reduce cost
B. improve surface finish
C. prevent clogging
D. reduce wear and eliminate scuffing
E. improve heat transfer

A. Brown coal
B. Anthracite coal
C. Hard coke
D. Woodchar coal

A. leaking piston rings
B. use of thick head gasket
C. clogged air-inlet slots
D. increase in clearance volume caused b bearing-bushing wear
E. all of the above