Variable Thrust MCQ

Test your knowledge with important Variable Thrust MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Variable Thrust MCQs at Bissoy

• Which of the following cannot be the nature of the actuation system for thrust vector control?
  ক

  Mechanical

  খ

  Fluidic

  গ

  Either mechanical or fluidic

  ঘ

  Neither mechanical and fluidic
• For a conical nozzle of throat diameter 0.007 m, exit cross-section diameter 0.02 m, and divergent section length of 0.038 m, determine the nozzle semi-divergence angle.
  ক

  10.5°

  খ

  12.6°

  গ

  7.3°

  ঘ

  9.7°
• Which of the following thrust modulation techniques uses a normal shock to reduce total thrust?
  ক

  Throat Shifting Thrust Modulation

  খ

  Scarfed Nozzle Thrust Modulation

  গ

  Shock Thrust Modulation

  ঘ

  Fluidic Thrust modulation
• Which of the following thrust modulation technique makes use of symmetric injection for jet area control?
  ক

  Throat Shifting Thrust Modulation

  খ

  Shock Thrust Modulation

  গ

  Shock Vectoring Control

  ঘ

  Scarfed Nozzle Thrust Modulation
• Assertion: Oxygen addition in the control flow gases of solid rocket engine will result in a higher characteristic velocity of the exit jet. Reason: Because of secondary combustion, stagnation temperature and pressure increase. Higher stagnation temperature results in exhaust jet characteristic velocity.
  ক

  Both assertion and reason are correct

  খ

  The assertion is correct but the reason is wrong

  গ

  The assertion is wrong but the reason is correct

  ঘ

  Both assertion and reason are wrong
• Which of the following is not a way for thrust modulation?
  ক

  Controlling the propellant flow rate to the injector

  খ

  Controlling injection orifices

  গ

  Varying chamber pressure

  ঘ

  Deploying control surfaces like fins
• Attitude and maneuvering corrections require impulses with _________ pulse width.
  ক

  extremely short

  খ

  extremely large

  গ

  moderately short

  ঘ

  moderately large
• Thrust can be varied by changing the throat area along with throttling the flow.
  ক

  True

  খ

  False
• A two-to-one thrust decrease can be achieved using _________ in a liquid propellant rocket engine.
  ক

  throttle valves

  খ

  gas pressure feed system

  গ

  spark ignitor

  ঘ

  using BATES grain
• Thrust is a weak function of ______________
  ক

  throat area

  খ

  chamber pressure

  গ

  mass flow rate

  ঘ

  thrust coefficient