A)
B is more efficient than A
B)
A is more efficient than B
C)
Both A and B are equally efficient
D)
Efficiency doesn’t depend on specific impulse

Correct Answer :  

Recently Updated in Rocket Propulsion Questions
In which of the propulsion systems is the maximum temperature achieved?
A)
Nuclear
B)
Chemical
C)
Arc heating
D)
Solar heating

Correct Answer : Option (C) :   Arc heating

Explanation : Arc heating can lead to temperatures of about 20,000 deg C. Chemical propulsion systems have a maximum temperature ranging from 2500-4100 deg C, while nuclear fission leads to temperatures of about 2700 deg C.

What is the propulsion duration of resistojets?
A)
Few weeks
B)
Few days
C)
Few minutes
D)
Few seconds

Correct Answer : Option (B) :   Few days

Explanation : Resistojets have a propulsion duration spanning a few days. The chemical rocket engines have a propulsion duration lasting a few seconds to a few minutes, while for ion-electrostatic engines, it lasts for months.

Which of the following engines can achieve the maximum specific impulse of 5000 s?
A)
Hall effect
B)
Ion-electrostatic
C)
Solar heating
D)
Nuclear fission

Correct Answer : Option (B) :   Ion-electrostatic

Explanation : Ion-electrostatic engine has a specific impulse of 1200-5000 s. Nuclear fission type engines have Isp of 500-860 s, while solar heating engines have it around 400-700 s.

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