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Mechanical Engineering Objective Questions { Internal Combustion Engines }

288. All heat engines utilize
A.Low Heat Value of oil
B.High Heat Value of oil
C.Net Calorific Value Of Oil
D.Calorific Value of Fuel
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289. An engine indicator is used to determine the following
C.Volume Of Cylinder
D.M.E.P. And I.H.P.
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290. Fuel oil consumption guarantees for I .C. engine are usually based on
A.Low Heat Value Of Oil
B.High Heat Value Of Oil
C.Net Calorific Value Of Oil
D.Calorific Value Of Fuel
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291. If the compression ratio of an engine working on Otto cycle is increased from 5 to 7, the %age increase in efficiency will be
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292. In case of gas turbines, the gaseous fuel consumption guarantees are based on
A.High Heat Value
B.Low Heat Value
C.Net Calorific Value
D.Middle Heat Value
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293. In a typical medium speed 4-stroke cycle diesel engine the inlet valve
A.Opens At 20° Before Top Dead Center And Closes At 35° After The Bottom Dead Center
B.Opens At Top Dead Center And Closes At Bottom Dead Center
C.Opens At 10° After Top Dead Center And Closes 20° Before The Bottom Dead Center
D.May Open Or Close Anywhere
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294. The pressure and temperature at the end of compression stroke in a petrol engine are of the order of
A.4 - 6 Kg/cm2 And 200 - 250°C
B.6 - 12 Kg/cm2 And 250 - 350°C
C.12 - 20 Kg/cm2 And 350 - 450°C
D.20 - 30 Kg/cm2 And 450 - 500°C
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