| 1 |
The kinetic energy of molecules of an ideal gas at absolute zero is |
- A. Very low
- B. Very high
- C. Zero
- D. First increases then decreases
|
| 2 |
The internal energy of a piece of lead when beaten by hammer will. |
- A. Increase
- B. Decrease
- C. Remains constant
- D. Increases and then decrease
|
| 3 |
The efficiency of diesel engine is about |
- A. 25% to 30%
- B. 35% to 40%
- C. 40% to 50%
- D. 50% to 60%
|
| 4 |
In the thermodynamics process , the equation W = -delta U represents. |
- A. Isothermal expension
- B. Isothermal compression
- C. Adiabatic expansion
- D. Adiabatic compression
|
| 5 |
The unit o pressure of gas is |
- A. Nm<sup>-2</sup>
- B. Pascal
- C. Atmosphere
- D. All of these
|
| 6 |
The efficiency of diesel engine is about |
- A. 25 % to 30%
- B. 35% to 40%
- C. 40% to 50%
- D. 50% to 60%
|
| 7 |
For a diatomic gas Cv= 5R/2 then gamma for this gas is. |
- A. 5/7
- B. 4/35
- C. 7/5
- D. 35/4
|
| 8 |
Force acting on the piston to move outward is. |
- A. Compressive stoke
- B. Power stoke
- C. All stoke
- D. Exhaust stoke
|
| 9 |
Entropy of measure of. |
- A. Internal energy of system
- B. Order of system
- C. Disorder of system
- D. Potential energy of system
|
| 10 |
Not change in entropy of a system after one complete Carnot cycle is. |
- A. Positive
- B. Negative
- C. Zero
- D. None of these
|