MCQOPTIONS
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MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Aerodynamics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
For a reversible process, which is not the correct statement? |
| A. | No presence of viscosity |
| B. | dw = -pdv |
| C. | dq pdv = de |
| D. | Mass diffusion occurs |
| Answer» E. | |
| 2. |
Which is the process in which no heat exchange is there between system and surroundings and in which no dissipative phenomena occur? |
| A. | Adiabatic process |
| B. | Reversible process |
| C. | Isentropic process |
| D. | Work |
| Answer» D. Work | |
| 3. |
Identify the incorrect source for the corresponding variables of the first law. |
| A. | Absorbed radiation: dq |
| B. | Squeezing of volume: dw |
| C. | Heating: de |
| D. | Displacement of system boundary: dq |
| Answer» E. | |
| 4. |
The first law of thermodynamics is proved by experiments. Select the correct choice for it. |
| A. | de is an exact differential |
| B. | dq is an exact differential |
| C. | dw is an exact differential |
| D. | The relation has been proved theoretically |
| Answer» B. dq is an exact differential | |
| 5. |
For air, at 35 C what is the total enthalpy? (cp=1005 ( frac {J}{kgK} )). |
| A. | Zero |
| B. | 309.54 J |
| C. | 309.54 kJ |
| D. | 8977 J |
| Answer» E. | |
| 6. |
The incorrect formula for the specific heat of an ideal gas in terms of specific heat ratio of a gas and universal gas constant is_____ |
| A. | c<sub>p</sub>-c<sub>v</sub>=2R |
| B. | ( frac {c_p}{c_v} )= |
| C. | c<sub>v</sub>= ( frac {R}{ gamma -1} ) |
| D. | c<sub>p</sub>= ( frac { gamma R}{ gamma -1} ) |
| Answer» B. ( frac {c_p}{c_v} )= | |
| 7. |
Which is not a state variable/function in the given options according to thermodynamics? |
| A. | Temperature |
| B. | Enthalpy |
| C. | Functions dependent on path |
| D. | Internal energy |
| Answer» D. Internal energy | |
| 8. |
Specific heat for gas is almost constant in the case of_______ |
| A. | Space vehicle |
| B. | High-temperature flow |
| C. | Air in a desert |
| D. | Chemically reacting flow at high- speeds |
| Answer» D. Chemically reacting flow at high- speeds | |
| 9. |
Which is the wrong result for a calorically perfect gas? |
| A. | e=c<sub>v</sub>T |
| B. | h=c<sub>p</sub>T |
| C. | c<sub>p</sub> and c<sub>p</sub> are functions of T |
| D. | For T < 1000 K, specific heats are constant |
| Answer» D. For T < 1000 K, specific heats are constant | |
| 10. |
The equation of state for a perfect gas is p = RT, where R is______ (for air at standard conditions). |
| A. | 287 kJ/kg.K |
| B. | 8314 kJ/kg |
| C. | 8.314 kJ/kgK |
| D. | 287 J/kg.K |
| Answer» E. | |