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.Management Sciences
Category: I.C. Engines
Carbon residue in diesel oil should not be more than___________________?
A. 1%
B. 0.5%
C. 0.1%
D. 0.01%
E. 0.001%
The following type of carburettor is preferred_______________?
A. concentric type
B. eccentric type
C. horizontal type
D. vertical type
E. none of the above
Leakage past the piston rings and valve seats in I.C. engines with increase in speed_______________?
A. increases.
B. decreases
C. remains same
D. unpredictable
E. none of the above
Normal heptane_______________?
A. accelerates auto-ignition
B. helps to resist auto-ignition
C. does not affect auto-ignition
D. has no relation with auto-ighition
E. retards auto-ignition
Method of governing used in diesel engine is__________________?
A. quantity governing
B. quality governing
C. combined governing
D. partial governing
E. nit and miss governing
The theoretically correct mixture of air and petrol is approximately ________________?
A. 0.334027778
B. 0.500694444
C. 0.625694444
D. 0.834027778
The efficiency of I.C. engines normally is of the order of_________________?
A. 15-20%
B. 20-25%
C. 25-30%
D. 30-35%
E. 35-50%
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
In carburettors, the top of the fuel jet with reference to the level in the float chamber is kept at_________________?
A. same level
B. slightly higher level
C. slightly lower level
D. may be anywhere
E. varies from situation to situation
Air fuel ratio at which a petrol engine can not work is_________________?
A. 8 : 1
B. 10 : 1
C. 15 : 1
D. 20 : 1 and less
E. will work at all ratios
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