A. 10%
B. 5%
C. 1%
D. 0.1%
E. 0.01%
Related Mcqs:
- 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. - The ash content in diesel oil should bot be more than_______________?
A. 1%
B. 5%
C. 0.1%
D. 0.01%
E. 0.001% - Excess quantities of sulphur in diesel fuel are Objectionable because it may cause the following______________?
Which of the following is false statement?
A. piston ring and cylinder wear
B. formation of hard coating on piston skirts
C. oil sludge in the engine crank case
D. detonation
E. forms corrosive acids - 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 - Sulphur content of fuels is very important to the plant operators because it____________________?
A. has high heating value
B. retards electric precipitation
C. promotes complete combustion
D. has highly corrosive effect
E. facilitates ash removal - 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 - Cetane number is determined by comparing the performance of diesel oil with the following hydrocarbons___________________?
A. cetane
B. mixture of cetane and alphamethyl napthalene
C. ethylene dibromide
D. mixture of aldehydes and ketones
E. mixture of cetane with tetra-ethyl lead - Carbon residue in diesel oil should not be more than___________________?
A. 1%
B. 0.5%
C. 0.1%
D. 0.01%
E. 0.001% - Ignition quality of diesel-fuel oil is expressed by an index called__________________?
A. octane number
B. cetane number
C. calorific value
D. carbon content
E. ignition temperature - The pour point of diesel oil must be_________________?
A. lower than the coldest atmospheric temperature at which oil is to be pumped
B. higher than above
C. has no such relation
D. more than 100°C
E. none of the above
