1
The calorific value of gaseous fuel is expressed in
A)
kJ
B)
kJ/kg
C)
kJ/m2
D)
kJ/m3
Answer & Solution
Answer: Option
D
2
The efficiency of Diesel cycle increases with
A)
Increase in cut-off
B)
Constant cut-off
C)
Decrease in cut-off
D)
None of these
Answer & Solution
Answer: Option
C
3
The efficiency of Carnot cycle is maximum for
A)
Gas engine
B)
Petrol engine
C)
Steam engine
D)
Reversible engine
Answer & Solution
Answer: Option
D
4
Boyle's law i.e. pV = constant is applicable to gases under
A)
All ranges of pressures
B)
Only small range of pressures
C)
High range of pressures
D)
Steady change of pressures
Answer & Solution
Answer: Option
B
5
The state of a substance whose evaporation from its liquid state is complete, is known as
A)
Perfect gas
B)
Vapour
C)
Steam
D)
Air
Answer & Solution
Answer: Option
A
6
For a perfect gas, according to Boyle’s law (where p = Absolute pressure, v = Volume and T = Absolute temperature)
A)
$$\frac{{\text{v}}}{{\text{T}}}$$ = constant, if p is kept constant
B)
pv = constant, if T is kept constant
C)
$$\frac{{\text{T}}}{{\text{p}}}$$ = constant, if v is kept constant
D)
$$\frac{{\text{p}}}{{\text{T}}}$$ = constant, if v is kept constant
Answer & Solution
Answer: Option
B
7
For a perfect gas, according to Boyle's law (where p = Absolute pressure, v = Volume and T = Absolute temperature)
A)
pv = constant, if T is kept constant
B)
$$\frac{{\text{v}}}{{\text{T}}}$$ = constant, if p is kept constant
C)
$$\frac{{\text{p}}}{{\text{T}}}$$ = constant, if v is kept constant
D)
$$\frac{{\text{T}}}{{\text{p}}}$$ = constant, if v is kept constant
Answer & Solution
Answer: Option
A
8
A closed system is one in which
A)
Mass does not cross boundaries of the system, though energy may do so
B)
Mass crosses the boundary but not the energy
C)
Neither mass nor energy crosses the boundaries of the system
D)
Both energy and mass cross the boundaries of the system
Answer & Solution
Answer: Option
A
9
An isolated system is one in which
A)
Mass does not cross boundaries of the system, though energy may do so
B)
Neither mass nor energy crosses the boundaries of the system
C)
Both energy and mass cross the boundaries of the system
D)
Mass crosses the boundary but not the energy
Answer & Solution
Answer: Option
B
10
An open system is one in which
A)
Mass does not cross boundaries of the system, though energy may do so
B)
Neither mass nor energy crosses the boundaries of the system
C)
Both energy and mass cross the boundaries of the system
D)
Mass crosses the boundary but not the energy
Answer & Solution
Answer: Option
C
