MCQOPTIONS
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MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Rocket Propulsion knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
If the pressure rise ΔP across a pump is half the discharge pressure, then which of the following relates the suction pressure Ps to discharge pressure pd? |
| A. | Ps = pd |
| B. | Ps = 2 x Pd |
| C. | 2 x Ps = Pd |
| D. | Ps = 4 x Pd |
| Answer» D. Ps = 4 x Pd | |
| 2. |
If L represents torque, and the subscripts T, o, f, b denotes the turbopump, oxidizer pump, fuel pump and bearings respectively, then which of the following expressions is true when there are no gears in a particular turbopump? |
| A. | LT = Lo + Lf + Lb |
| B. | LT = Lo x Lf x Lb |
| C. | LT = Lo = Lf = Lb |
| D. | LT = Lo = Lf ≠ Lb |
| Answer» B. LT = Lo x Lf x Lb | |
| 3. |
Which of the following expressions is true when there are no gears in a particular turbopump? |
| A. | NT = No ≠ Nf |
| B. | NT ≠ No = Nf |
| C. | NT ≠ No ≠ Nf |
| D. | NT = No = Nf |
| Answer» E. | |
| 4. |
The power is expressed as the product of torque and ____________ |
| A. | vehicle speed |
| B. | shaft speed |
| C. | exhaust velocity |
| D. | volume flow rate per unit cross-sectional area |
| Answer» C. exhaust velocity | |
| 5. |
If power of turbines equals PT, power consumed by pumps is PP and the power consumed by auxiliaries is PA, what is the expression for auxiliary power? |
| A. | PA = PP – PT |
| B. | PA = PP + PT |
| C. | PA = PT – PP |
| D. | PA = PT x PP |
| Answer» D. PA = PT x PP | |
| 6. |
If the gear ratio for fuel pump is thrice that of the oxidizer pump, the shaft speed of fuel pump is ____________ the oxidizer pump. |
| A. | half |
| B. | twice |
| C. | thrice |
| D. | one-third |
| Answer» E. | |
| 7. |
In a turbopump, what are are the gear ratios for ao and af (for oxidizer pump and fuel pump respectively) if no gears are used? |
| A. | 0 for both |
| B. | 1 for both |
| C. | 0 for ao and 1 for af |
| D. | 0 for af and 1 for ao |
| Answer» C. 0 for ao and 1 for af | |
| 8. |
What is the total mass flow rate through the gas generator if the oxidizer flow through it is 15 kg/s and fuel flow is 18 kg/s? |
| A. | 3 kg/s |
| B. | 48 kg/s |
| C. | 53 kg/s |
| D. | 33 kg/s |
| Answer» E. | |
| 9. |
The fuel flow (mf) through the gas generator is ____________ if its flow rate through the pump is 18 kg/s and through the thrust chamber is 10 kg/s. |
| A. | 18 kg/s |
| B. | 10 kg/s |
| C. | 8 kg/s |
| D. | 28 kg/s |
| Answer» D. 28 kg/s | |
| 10. |
The oxidiser flow (mo) through the gas generator is ____________ if its flow rate through the pump is 10 kg/s and through the thrust chamber is 5 kg/s. |
| A. | 5 kg/s |
| B. | 15 kg/s |
| C. | 20 kg/s |
| D. | 25 kg/s |
| Answer» B. 15 kg/s | |