I.C. Engines

A. 1%
B. 5%
C. 0.1%
D. 0.01%
E. 0.001%

A. higher self ignition temperature
B. lower self ignition temperature
C. proper self ignition temperature
D. self ingition temperature has nothing to do with detonation
E. none of the above

A. 2-stroke engine can run in any direction
B. In 4-stroke engine, a power stroke is obtained in 4-strokes
C. thermal efficiency of 4-stroke engine is more due to positive scavenging
D. petrol engines work on otto cycle
E. petrol engines occupy more space than diesel engines for same power output

A. supercharging reduces knocking in diesel engines
B. there can be limited supercharging in petrol engines because of detonation
C. supercharging at high altitudes is essential
D. supercharging results in fuel economy
E. supercharging is essential in aircraft engines

A. All the irreversible engines have same efficiency
B. All the reversible engines have same efficiency
C. Both Rankine and Caront cycles have same efficiency between same temperature limits
D. All reversible engines working between same temperature limits have same-efficiency
E. Between same temperature limits, both petrol and diesel engines have same efficiency

A. Thermal efficiency of diesel engine i about 34%
B. Theoretically correct mixture of air am petrol is approximately 15 : 1
C. High speed compression engines operate on dual combustion cycle
D. Diesel engines are compression ignition engines
E. S.I. engines are quality-governed engines

A. 10%
B. 5%
C. 1%
D. 0.1%
E. 0.01%

A. 15-20%
B. 20-25%
C. 25-30%
D. 30-35%
E. 35-50%

A. 1-3-6-5-2-4
B. 1-4-2-5-6-3
C. 1-6-2-5-4-3
D. 1-5-2-6-3-4
E. 1-5-3-4-2-6

A. increase
B. decreae
C. be unaffected
D. depend on other factors
E. unpredictable