Aerospace Engineering Gate 2018 Questions with Answer

Ques 53 GATE 2018

Assuming ISA standard sea level conditions (288.16 K, density of 1.225 kg/m³, g=9.81m/s², R=287 J/(kg-K)), the density (in kg/m³) of air at Leh, which is at an altitude of 3500 m above mean sea level is ________ (accurate to two decimal places).

Ques 54 GATE 2018

Consider a cubical tank of side 2 m with its top open. It is filled with water up to a height of 1 m. Assuming the density of water to be 1000 kg/m³, g as 9.81 m/s² and the atmospheric pressure to be 100 kPa, the net hydrostatic force (in kN) on the side face of the tank due to the air and water is ________ (accurate to two decimal places).

Ques 55 GATE 2018

The theoretical maximum velocity (in m/s) of air expanding from a reservoir at 700 K is ________(accurate to two decimal places). Specific heat of air at constant pressure is 1005 J/(kg-K).

Ques 56 GATE 2018

For a damped single degree of freedom system with damping ratio of 0.1, ratio of two successive peak amplitudes of free vibration is ________ (accurate to two decimal places).

Ques 57 GATE 2018

The natural frequency (in rad/s) of the spring-mass system shown in the figure below is ________ (accurate to one decimal place).
k₁=20 N/m
k₂=20 N/m
m₁=6 kg

m₂=4 kg

Ques 58 GATE 2018

The stagnation pressures at the inlet and exit of a subsonic intake are 100 kPa and 98 kPa, respectively. The pressure recovery of this intake will be ________ (accurate to two decimal places).

Ques 59 GATE 2018

A combustor is operating with a fuel-air ratio of 0.03. If the stoichiometric fuel-air ratio of the fuel used is 0.06, the equivalence ratio of the combustor will be ________ (accurate to two decimal places).