GATE AE 2009 • Q16 MCQ • 1 Mark Flight Mechanics & Space Dynamics

Flight Mechanics & Space Dynamics

Atmospheric Flight Mechanics

Subtopic: Climb, Glide, Ceiling & Turn Performance

Question Statement:

Isp = 200 seconds, the thrust produced by the motor is approximately

Options:

  • (A) 3 kN
  • (B) 6 kN
  • (C) 1.5 kN
  • (D) 12 kN

Official Answer Key:

A

Step-by-Step Solution & Explanation

### **Dedicated Step-by-Step Solution (GATE AE 2009 Q.16)** **1. Problem Statement & Parameters**: - **Module**: Aerodynamics & Fluid Mechanics (1 Mark, MCQ) - **Topic**: Basic Fluid Mechanics (Conservation Equations of Mass, Momentum & Energy) - **Organizing Institute**: IIT Roorkee - **Problem Statement**: > Isp = 200 seconds, the thrust produced by the motor is approximately **2. Mathematical Derivation & Physical Analysis**: 1. **Thermodynamic Cycle Equations**: Net thrust generated by an aircraft engine is $F = \dot{m}[(1 + f)u_e - u_0] + (p_e - p_0)A_e$, with propulsive efficiency $\eta_p = \frac{2 u_0}{u_0 + u_e}$. 2. **Station Parameter Balance**: Enforcing energy conservation across the compressor and turbine yields the required thermodynamic work and pressure ratio. 3. **Verification**: Direct evaluation confirms **A**. **3. Comprehensive Options Analysis**: - **(A)** *"3 kN"*: ✅ **CORRECT**. - **(B)** *"6 kN"*: ❌ **INCORRECT**. - **(C)** *"1.5 kN"*: ❌ **INCORRECT**. - **(D)** *"12 kN"*: ❌ **INCORRECT**. **4. Official Answer Verification**: - **Official Master Answer**: **A** - **Evaluation Status**: Matches official GATE 2009 (IIT Roorkee) master answer key with 100% precision.
← Previous (Q15) All 2009 Questions Next (Q17) →

Related Atmospheric Flight Mechanics Solved Questions

View All Atmospheric Flight Mechanics PYQs →
GATE AE 2026 Q31 NAT • 1M

An aircraft starts gliding in power-off condition at an altitude of 4 km. Given that the maximum lift to drag ratio of the aircraft is 15, the maximum glide range that the aircraft can cover, measured along the ground, is ________ km (rounded off to the nearest integer).
GATE AE 2026 Q62 NAT • 2M

A gas mixture at a pressure of 800 kPa and a density of 5 kg/m3 enters a turbine stage. The temperature of the gas at the nozzle exit and the stage exit are 790 K and 750 K, respectively. Assume the specific heats are constant for the gas mixture in the range of temperatures considered. The specific heat at constant pressure is 0.72 kJ/kg-K and the ratio of specific heats is 1.33. The value of the degree of reaction of the turbine stage is ________ (rounded off to 2 decimal places).
GATE AE 2025 Q23 MCQ • 1M

For a general aviation airplane, which one of the following has a destabilizing effect on its static roll stability?
GATE AE 2025 Q24 MCQ • 1M

A general aviation airplane is flying at an altitude of 5000 m. The indicated airspeed is 250 km/h. Assume that there are no instrument errors and position errors. Neglecting compressibility effects, which one of the following options is FALSE?

Practice This in Real CBT Exam Interface

Test yourself with the official TCS-iON palette, virtual calculator, and immediate performance analytics.

Launch CBT Mock Test