A. When coal is strongly heated continuously for 42 to 48 hours in the absence of air in a closed vessel
B. From the finely ground coal by moulding under pressure with or without a binding material
C. When coal is first dried and then crushed to a fine powder by pulverizing machine
D. By heating wood with a limited supply of air to a temperature not less than 280°C
Answer: Option A
This Question Belongs to Mechanical Engineering >> Engineering Thermodynamics
Addition of heat at constant pressure to a gas results in
A. Raising its temperature
B. Raising its pressure
C. Raising its volume
D. Raising its temperature and doing external work
Which of the following items is not a path function?
A. Heat
B. Work
C. Kinetic energy
D. Thermal conductivity
An actual engine is to be designed having same efficiency as the Carnot cycle. Such a proposition is
A. Feasible
B. Impossible
C. Possible
D. Possible, but with lot of sophistications
The absolute zero pressure can be attained at a temperature of
A. 0°C
B. -273°C
C. 273 K
D. None of these
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