Applied Thermodynamics (3161910) MCQs

MCQs of Fuel Air and Actual Cycles

Showing 1 to 10 out of 28 Questions
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1.
A stoichiometric air-fuel ratio is
(a) chemically correct mixture
(b) lean mixture
(c) rich mixture for idling
(d) rich mixture for overloads
Answer:

Option (a)

2.
As compared to air cycle, in actual working, the effect of variation in specific heats is to
(a) increase maximum pressure and maximum temperature
(b) reduce maximum pressure and maximum temperature
(c) increase maximum pressure and decrease maximum
(d) none of the mentioned
Answer:

Option (b)

3.
Dissociation is the disintegration of burnt gases at __________ temperatures.
(a) low
(b) high
(c) constant
(d) none of the mentioned
Answer:

Option (c)

4.
In lean mixtures no dissociation takes place as the temperature is____________ .
(a) low
(b) high
(c) constant
(d) none of the mentioned
Answer:

Option (a)

5.
In rich mixtures dissociation is prevented by the available
(a) CO
(b) CO2
(c) O2
(d) CO2 & O2
Answer:

Option (d)

6.
Power output is maximum at a stoichiometric ratio where there is
(a) dissociation
(b) no dissociation
(c) rich mixture
(d) none of the mentioned
Answer:

Option (b)

7.
Maximum dissociation is for
(a) lean mixture
(b) rich mixture
(c) stoichiometric
(d) none of the mentioned
Answer:

Option (c)

8.
With dissociation, the peak temperature is obtained
(a) at the stoichiometric ratio
(b) when the mixture is slightly lean
(c) when the mixture is slightly rich
(d) none of the mentioned
Answer:

Option (c)

9.
When the mixture is lean
(a) efficiency is less
(b) power output is less
(c) maximum temperature and pressure are higher
(d) all of the mentioned
Answer:

Option (b)

10.
Fuel air ratio affects the maximum power output of the
(a) higher specific heats
(b) chemical equilibrium losses
(c) (a) & (b) both
(d) none of the mentioned
Answer:

Option (c)

Showing 1 to 10 out of 28 Questions
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