A. Supercharging
B. Wall temperature
C. Compression ratio
D. Engine speed
Related Mcqs:
- Air-petrol ratio for maximum power generation in spark ignition engine is about_____________________?
A. 6 : 1
B. 12 : 1
C. 18 : 1
D. 24 : 1 - The following heat engine produces power of 100,000 kW. The heat engine operates between 800 K and 300 K. It has a thermal efficiency equal to 50% of that of the Carnot engine for the same temperature. The rate at which heat is absorbed from the hot reservoir is____________________?
A. 100,000 kW
B. 160,000 kW
C. 200,000 kW
D. 320,000 kW - The efficiency of an Otto engine compared to that of a diesel engine, for the same compression ratio will be _______________?
A. More
B. Less
C. Same
D. Data insufficient to predict - Which of the following decreases with increase in pressure ?
A. Melting point of ice
B. Melting point of wax
C. Boiling point of liquids
D. None of these - Major sources of noise in furnace operation arises from air inspirators, combustion, side wall vibrations and fluctuation in the process heat load. A 50% increase in fuel firing rate may increase the furnace noise level by about ____________ decibels?
A. 3
B. 30
C. 7
D. 70 - Which of the following is normally not found in both the S.I. (petrol) & C.I. (diesel) engines ?
A. Air filter
B. Fuel injector
C. Exhaust silencer
D. Battery - Lead exhausted in the atmosphere by automobiles using leaded petrol (i.e. tetraethyl lead for improving octane number) is a lethal air pollutant which causes_________________?
A. Paralysis of muscles & loss of appetite
B. Nervous depression
C. Gastritis and diarrhea
D. All A., B. and C. - Inhalation of lead compounds present in the automobile exhausts (using leaded petrol) causes________________?
A. Blood poisoning
B. Anaemia
C. Nervous system disorder
D. All A., B. and C. - In any spontaneous process, the ______________ free energy decreases ?
A. Helmholtz
B. Gibbs
C. Both A. & B.
D. Neither A. nor B. - When a gas in a vessel expands, its internal energy decreases. The process involved is________________?
A. Reversible
B. Irreversible
C. Isothermal
D. Adiabatic
