Aerospace Engineering
GATE AE Rockets PYQs
Build your understanding with focused practice from past exam papers.
Questions 11–17 of 17. Imported answers require independent review unless marked reviewed.
Question 14
Open questionAEMCQ1 markNeeds review
Which one of the following is a hypergolic propellant combination used in rocket engines?
Your answerChoose one option.
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 50
Open questionAENAT2 marksNeeds review
A rocket engine has a sea level specific impulse of 210 s and a nozzle throat area of 0.005 m². While testing at sea level conditions, the characteristic velocity and pressure for the thrust chamber are 190 m/s and 50 bar, respectively. Assume the acceleration due to gravity to be 9.8 m/s². The thrust produced by the rocket engine is ______ kN (round off to one decimal place).
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 45
Open questionAENAT2 marksNeeds review
For a rocket engine, the velocity ratio
is
, where
is the vehicle velocity and
is the exit velocity of the exhaust gases. Assume the flow to be optimally expanded through the nozzle. For
, if
is the thrust produced and
is the mass flow rate of exhaust gases, then
is ______.Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 46
Open questionAENAT2 marksNeeds review
The specific impulse of a rocket engine is 300 Ns/kg. The mass of the rocket at burnout is 1000 kg. The propellant consumed in the process is 720 kg. Assume all factors contributing to velocity loss to be negligible. The change in vehicle velocity
is ______ km/s (round off to 2 decimal places).Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 35
Open questionAEMCQ2 marksNeeds review
A rocket has an initial mass of 150 kg. After operating for a duration of 10 s, its final mass is 50 kg. If the acceleration due to gravity is 9.81 m/s
and the thrust produced by the rocket is 19.62 kN, the specific impulse of the rocket isYour answerChoose one option.
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 16
Open questionAEMCQ1 markNeeds review
Among the following engines, which one is expected to have the maximum Specific Impulse?
Your answerChoose one option.
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 49
Open questionAENAT2 marksNeeds review
A single stage chemical rocket, having an initial mass of 10,000 kg and specific impulse of 450 s, is launched from the surface of the earth and has to reach the escape velocity (11 km/s) at burn out. Consider
m/s². If the atmospheric drag and the effect of gravity are to be neglected, the mass of propellant to be carried by the rocket is equal to ________ kg (in one decimal place).Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer