A. peak pressure
B. rate of rise of pressure
C. rate of rise of temperature
D. peak temperature
E. rate of rise of horse-power
Related Mcqs:
- Detonation is caused by the following unstable compounds______________________?
A. peroxides, aldehydes and ketones
B. peroxides, aldehydes, oxides and sul-phides
C. aldehydes, oxides and ketones
D. ketones and sulphur compounds
E. none of the above - A 75 cc engine has following parameter as 75 cc ___________________?
A. fuel tank capacity
B. lub oil capacity
C. swept volume
D. cylinder volume
E. clearance volume - According to Recardo’s theory, detonation occurs due to______________________?
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 - Detonation can be controlled by_____________________?
A. varying compression ratio
B. using lian mixture
C. retarding the spark timing
D. reducing the r.p.m.
E. increasing inlet pressure - 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. heating incoming air
D. scavenging
E. supercharging - Diesel engine can work on very lean air fuel ratio of the order of 30 : 1. A petrol engine can also work on such a lean ratio provided__________________?
A. it is properly designed
B. best quality fuel is used
C. can not work as it is impossible
D. flywheel size is proper
E. engine cooling is stopped - The specific fuel consumption of a petrol engine compared to diesel engine of same H.P. is_______________?
A. same
B. more
C. less
D. less or more depending on operating conditions
E. unpredictable - The thermal efficiency of a petrol engine of two stroke with crank case scavenging as compared to four stroke petrol engine with same comperssion ratio will be_____________________?
A. higher
B. lower
C. same
D. depends on size of engine
E. unpredictable. - For same power and same speed, the flywheel of a four stroke engine as compared to two-stroke I.C. engine will be________________?
A. smaller
B. bigger
C. same size
D. dependent on other engine parameters
E. unpredictable - With increase in engine speed, the ignition of spark in petrol engine has to be __________________?
A. Unaltered
B. Increased
C. Decreased
D. Advanced
