Exercise: Thermodynamics

Questions for: Thermodynamics

Carbonisation of coal consists of
A:
drying and crushing the coal to a fine powder
B:
moulding the finely ground coal under pressure with or without a binding material
C:
heating the wood with a limited supply of air to temperature not less than 280°C
D:
none of the above
Answer: D
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The ratio of specific heat at constant pressure (cp) and specific heat at constant volume (cv) is
A:
equal to one
B:
less than one
C:
greater than one
D:
none of these
Answer: C
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The atomic mass of oxygen is
A:
12
B:
14
C:
16
D:
32
Answer: C
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The entropy __________ in an irreversible cyclic process.
A:
remains constant
B:
decreases
C:
increases
D:
Answer: C
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The efficiency of Diesel cycle approaches to Otto cycle efficiency when
A:
cut-off is increased
B:
cut-off is decreased
C:
cut-off is zero
D:
cut-off is constant
Answer: C
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