MCQOPTIONS
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MCQOPTIONS
This section includes 9 Mcqs, each offering curated multiple-choice questions to sharpen your Aerodynamics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Flow over a rocket outside the boundary layer is isentropic. |
| A. | False |
| B. | True |
| Answer» C. | |
| 2. |
An isentropic process is restrictive and is not feasible in real life. |
| A. | False |
| B. | True |
| Answer» B. True | |
| 3. |
The isentropic relation between pressure and temperature of a calorically perfect gas is_____ |
| A. | ( frac {p_2}{p_1} =( frac {T_2}{T_1} )^{ frac { gamma }{ gamma -1}} ) |
| B. | ( frac {p_1}{p_2} =( frac {T_2}{T_1} )^{ frac { gamma }{ gamma -1}} ) |
| C. | ( frac {p_2}{p_1} =( frac {T_2}{T_1} )^{ frac { gamma -1}{ gamma }} ) |
| D. | ( frac {p_1}{p_2} =( frac {T_2}{T_1} )^{ frac { gamma -1}{ gamma }} ) |
| Answer» B. ( frac {p_1}{p_2} =( frac {T_2}{T_1} )^{ frac { gamma }{ gamma -1}} ) | |
| 4. |
For a calorically perfect gas, entropy is not________ |
| A. | State function |
| B. | Conserved in a reversible process |
| C. | A function of two thermodynamic variables |
| D. | Zero always |
| Answer» E. | |
| 5. |
The incorrect formula for entropy for a calorically perfect gas is____ |
| A. | ds=0 |
| B. | s=s(p,T) |
| C. | s<sub>2</sub>-s<sub>1</sub>=c<sub>v</sub>ln ( frac {T_2}{T_1} )+Rln ( frac {v_2}{v_1} ) |
| D. | s<sub>2</sub>-s<sub>1</sub>=c<sub>p</sub>ln ( frac {T_2}{T_1} )-ln ( frac {p_2}{p_1} ) |
| Answer» B. s=s(p,T) | |
| 6. |
First law when expressed in terms of entropy takes the form_____ |
| A. | T ds = de p dv |
| B. | T ds = dh p dv |
| C. | T ds = de + p dv |
| D. | T ds = dh + p dv |
| Answer» D. T ds = dh + p dv | |
| 7. |
For a block of ice on a plate, second law of thermodynamics says that____ |
| A. | The plate will get hotter |
| B. | Ice will get cooler |
| C. | Cannot give conclusive direction |
| D. | Ice will melt |
| Answer» E. | |
| 8. |
Which is the correct result according to the second law of thermodynamics? |
| A. | Total change in entropy is always zero |
| B. | Total change in entropy in a reversible process is always zero |
| C. | Total change in entropy in an irreversible process is always zero |
| D. | Total change in entropy for an irreversible process is negative |
| Answer» C. Total change in entropy in an irreversible process is always zero | |
| 9. |
The equation of the second law of thermodynamics says that____ |
| A. | Total change in entropy is always zero |
| B. | We cannot find entropy for an irreversible process |
| C. | Entropy change is defined as the heat added in an irreversible process |
| D. | Entropy is a state process |
| Answer» E. | |