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Mechanical Engineering Objective Questions { Thermodynamics }



512. Which of the following statement is incorrect?
A. The liquid fuels consist of hydrocarbons.
B. The liquid fuels have higher calorific value than solid fuels.
C. The solid fuels have higher calorific value than liquid fuels.
D. A good fuel should have low ignition point.
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513. Which of the following gas is mostly used in town for street and domestic lighting and heating?
A. Producer gas
B. Coal gas
C. Mond gas
D. Coke oven gas
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514. The value of gas constant (R) in S. I. units is
A. 0.287 J/kgK
B. 2.87 J/kgK
C. 28.7 J/kgK
D. 287 J/kgK
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515. The efficiency of Diesel cycle increases with
A. decrease in cut-off
B. increase in cut-off
C. constant cut-off
D. none of these
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516. One kg of carbon monoxide requires __________ kg of oxygen to produce 11/7 kg of carbon dioxide gas.
A. All
B. 4/7
C. 11/4
D. 9/7
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517. The absolute zero temperature is taken as
A. -273°C
B. 273°C
C. 237°F
D. -237°F
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518. The specific heat of water is
A. 1.817
B. 2512
C. 4.187
D. none of these
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