A. octane number
B. cetane number
C. calorific value
D. carbon content
E. ignition temperature
Related Mcqs:
- The self-ignition temperature of diesel oil compared to petrol is_________________?
A. higher
B. lower
C. same
D. depends on quality of fuel
E. unpredictable - Auto-ignition reaction time for petrol engine first decreases with increase in fuel air ratio, reaches a minimum value and then increases with subsequent increase in fuel air ratio. The minimum value occurs in the region of________________?
A. Lean mixture
B. Chemically correct fuel air ratio
C. Rich mixture
D. Unpredictable - High carbon content in diesel oil used for diesel engine leads to_________________?
A. production of highly corrosive gases corroding the cylinder walls and exhaust system
B. excessive engine wear
C. damaging of both the storage tank and the engine
D. deposition on engine parts
E. none of the above. - In diesel engine the diesel fuel injected into cylinder would burn instantly at about compressed air temperature of____________________?
A. 250°C
B. 500°C
C. 1000°C
D. 150CPC
E. 2000°C - The ignition coil in diesel engines produces voltage of the order of________________?
A. 6 to 12 volts
B. 240 volts
C. 1000 volts
D. 20,000 volts
E. 80,000 volts - Ignition quailty of petrol is expressed by___________________?
A. octane number
B. cetane number
C. calorific value
D. self ignition temperature
E. distillation temperature - Volatility of diesel fuel oil is_________________?
A. minimum temperature to which oil is heated in order to give off inflammable vapours in sufficient quantity to ignite momentarily when brought in contact with a flame
B. temperature at which it solidifies or congeals
C. it catches fire without external aid
D. indicated by 90% distillation temperature, i.e., when 90% of sample oil has distilled off
E. temperature at which it flows easily - The specific fuel consumption for a petrol engine first decreases with increase in fuel air ratio and then increases with further increase in fuel air ratio. The minimum value occurs in the range of__________________?
A. lean mixture
B. chemically correct mixture
C. rich mixture
D. unpredictable
E. none of the above - Diesel engines have low specific fuel consumption compared to petrol engine. This statement is____________________?
A. not true
B. true at full load
C. true at part load
D. true at both part and full load
E. there could not be any such criterion - The knocking in diesel engines for given fuel, will be__________________?
A. enhanced by increasing compression ratio
B. enhanced by decreasing compression ratio
C. unaflected by compression ratio
D. first enhanced by increasig compression ratio upto a limit beyond which it will be suppressed
E. dependent on other factors
