Q.1
Which of the following is not true about chemical rockets?
  • a) Relatively low values of specific impulse
  • b) Relatively light machinery
  • c) Very high thrust capability
  • d) Very low specific power
Q.2
Which of the following vehicles is used where the flight time is long?
  • a) Electrical propulsion unit
  • b) Solid propulsion system
  • c) Liquid propulsion system
  • d) Hybrid propulsion system
Q.3
What is a sensible specific impulse value for a nuclear fission type rocket engine among the given options?
  • a) 300 s
  • b) 600 s
  • c) 800 s
  • d) 2000 s
Q.4
What is the typical order of magnitude of mass flow rate (in kg/s) for a chemical rocket engine?
  • a) 10
  • b) 0.1
  • c) 0.01
  • d) 1
Q.5
Which of the following engines can achieve the maximum specific impulse ofs?
  • a) Ion-electrostatic
  • b) Nuclear fission
  • c) Hall effect
  • d) Solar heating
Q.6
What is the propulsion duration of resistojets?
  • a) Few seconds
  • b) Few minutes
  • c) Few days
  • d) Few weeks
Q.7
In which of the propulsion systems is the maximum temperature achieved?
  • a) Chemical
  • b) Nuclear
  • c) Arc heating
  • d) Solar heating
Q.8
Which of the following types of engines use Xe as a typical working fluid?
  • a) Resistojets
  • b) Electro thermal
  • c) Hall effect
  • d) Nuclear fission
Q.9
Which of the following can typically achieve maximum effective exhaust velocity?
  • a) Electrostatic and electromagnetic
  • b) Arcjet
  • c) Solar heated H2
  • d) Nuclear fission
Q.10
A rocket engine moving atm/s produces a total thrust ofN, consuming propellants at the rate of 4.kg/s. The energy content of the propellants is 5.MJ/kg. Find the effective exhaust velocity.
  • a) 2100 m/s
  • b) 3936 m/s
  • c) 1555 m/s
  • d) 1400 m/s
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