Practice Test: Question Set - 19
1. Energy can neither be created nor destroyed, but it can be transformed from one form to another. This statement is known as
- (A) Zeroth
law of thermodynamics
- (B) First
law of thermodynamics
- (C) Second
law of thermodynamics
- (D) Kinetic
theory of gases
2. When the gas is heated at constant pressure, the heat supplied
- (A) Increases
the internal energy of the gas
- (B) Increases
the temperature of the gas
- (C) Does
some external work during expansion
- (D) Both (B) and
(C)
3. When a gas is heated at constant volume
- (A) Its
temperature will increase
- (B) Its
pressure will increase
- (C) Both
temperature and pressure will increase
- (D) Neither
temperature nor pressure will increase
4. Which of the following is the correct statement?
- (A) For
a given compression ratio, both Otto and Diesel cycles have the same efficiency
- (B) For
a given compression ratio, Otto cycle is more efficient than Diesel cycle
- (C) For
a given compression ratio, Diesel cycle is more efficient than Otto cycle
- (D) The
efficiency of Otto or Diesel cycle has nothing to do with compression ratio
5. One kg of hydrogen requires 8 kg of oxygen and produces
- (A) 1 kg of
water
- (B) 7 kg of
water
- (C) 8 kg of
water
- (D) 9 kg of
water
6. Which of the following statement is correct according to Clausis statement of second law of thermodynamics?
- (A) It is
possible to transfer heat from a body at a lower temperature to a body at a
higher temperature.
- (B) It
is impossible to transfer heat from a body at a lower temperature to a body at
a higher temperature, without the aid of an external source.
- (C) It is
possible to transfer heat from a body at a lower temperature to a body at a
higher temperature by using refrigeration cycle.
- (D) None
of the above
7. One molecule of oxygen is __________ times heavier than the hydrogen atom.
- (A) 12
- (B) 14
- (C) 16
- (D) 32
8. The absolute zero temperature is taken as
- (A) -273°C
- (B) 73°C
- (C) 237°C
- (D) -237°C
9. The efficiency and work ratio of a simple gas turbine cycle are
- (A) Low
- (B) Very low
- (C) High
- (D) Very high
10. The specific heat of water is
- (A) 1.817
- (B) 2512
- (C) 4.187
- (D) None of
these
11. The specific heat at constant volume is
- (A) The amount
of heat required to raise the temperature of unit mass of gas through one
degree, at constant pressure
- (B) The
amount of heat required to raise the temperature of unit mass of gas through
one degree, at constant volume
- (C) The
amount of heat required to raise the temperature of 1 kg of water through one
degree
- (D) Any
one of the above
12. For the same compression ratio, the efficiency of dual combustion cycle is
- (A) Greater
than Diesel cycle and less than Otto cycle
- (B) Less
than Diesel cycle and greater than Otto cycle
- (C) Greater than
Diesel cycle
- (D) Less
than Diesel cycle
13. The main cause for the irreversibility is
- (A) Mechanical
and fluid friction
- (B) Unrestricted
expansion
- (C) Heat
transfer with a finite temperature difference
- (D) All of the
above
14. The mass of flue gas per kg of fuel is the ratio of the
- (A) Mass
of oxygen in 1 kg of flue gas to the mass of oxygen in 1 kg of fuel
- (B) Mass
of oxygen in 1 kg of fuel to the mass of oxygen in 1 kg of flue gas
- (C) Mass
of carbon in 1 kg of flue gas to the mass of carbon in 1 kg of fuel
- (D) Mass of
carbon in 1 kg of fuel to the mass of carbon in 1 kg of flue gas
15. The heating of a gas at constant pressure is governed by
- (A) Boyle's law
- (B) Charles' law
- (C) Gay-Lussac
law
- (D) Avogadro's
law
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