1. a reversible hear engine

2. a reversible heat pump or a reversible refrigerator

3. an irreversible heat engine

4. an irreversible heat pump or an irreversible refrigerator

4

a reversible hear engine

No Explanation available for this question

1. The internal energy of the gas decreases from its initial value, but the enthalpy remains constant

2. The internal energy of the gas increases from its initial value, but the enthalpy remains constant

3. Both internal energy and enthalpy of the gas remain constant

4. Both internal energy and enthalpy of the gas increase

4

Both internal energy and enthalpy of the gas remain constant

No Explanation available for this question

1. 10°C

2. 20°C

3. 30°C

4. 400C

4

20°C

No Explanation available for this question

1. 0(N. m)/(kg/s)

2. 1.25 (N. m)/(kg/s)

3. 2.5 (N. m)/(kg/s)

4. 3.75 (N. m)/(kg/s)

4

3.75 (N. m)/(kg/s)

No Explanation available for this question

1. 720 kJ/kg

2. 2280 kJ/kg

3. 1500 kJ/kg

4. 3000 kJ/kg

4

720 kJ/kg

No Explanation available for this question

1. 0.57

2. 1.13

3. 2.26

4. 4.52

4

1.13

No Explanation available for this question

1. 0.25

2. 0.5

3. 0.75

4. 1

4

0.5

No Explanation available for this question

1. ∂T/∂x=20 K/m, ∂T/∂y=0 K/m

2. ∂T/∂x=0 K/m, ∂T/∂y=10 K/m

3. ∂T/∂x=10 K/m, ∂T/∂y=10 K/m

4. ∂T/∂x=0 K/m, ∂T/∂y=20 K/m

4

∂T/∂x=0 K/m, ∂T/∂y=20 K/m

No Explanation available for this question

1. is valid only if the process is both reversible and adiabatic

2. is valid only if the process is both reversible and isothermal

3. is valid for any reversible process

4. is incorrect; it must be

4

is valid for any reversible process

No Explanation available for this question

1. mn

2. 2(m + n)

3. m + n

4. m + n – 1

4

m + n – 1

No Explanation available for this question