GATE AE kind:question PYQs & Answers — Page 26 — Exam Papers

Questions 251–260 of 650. Imported answers require independent review unless marked reviewed.

Topic practice 650 questionsPage 26 of 65

A thin cambered airfoil has lift coefficient

at an angle of attack

. Assuming that stall occurs at much larger

, the

at

is _______. (round off to two 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 answer

In a potential flow, a uniform stream of strength U directed along the x-axis and four line sources (2-dimensional) of strengths

are placed along the x-axis at x = 0, 1, 2 and 3, respectively. The strength of an additional line source to be placed at x = 4 such that a closed streamline encircles all five sources is _____. (round off to two 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 answer

Enstrophy is defined as the square of the magnitude of vorticity. For the three-dimensional velocity field

the enstrophy at location (1, 1, 1) is _______. (round off to two 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 answer

An airplane with wing planform area of 20 m

and weight 8 kN is flying straight and level with a speed of 100 m/s. The total drag coefficient is 0.026 and the air density is 0.7 kg/m

. The total thrust required to introduce a steady climb angle of 0.1 radians is ___ N. (round off to the nearest integer)

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

The maximum permissible load factor and the maximum lift force coefficient for an airplane is 7 and 2, respectively. For a wing loading of 650 N/m

and air density 1.23 kg/m

, the speed yielding the highest possible turn rate in the vertical plane is __________ m/s. (round off to the nearest integer)

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

A gas turbine combustor is burning methane and air at an equivalence ratio

, where

and

is the ratio of mass flow rate of fuel to the mass flow rate of air at stoichiometry. If the air flow rate is

kg/s then the mass flow rate of methane is _____ kg/s. (round off to two 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 answer

The universal gravitational constant is

Nm

/kg

. For a planet of mass

kg and radius 3390 km, the escape velocity is _____ km/s. (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 answer

A satellite is in a circular orbit around Earth with a time period of 90 minutes. The radius of Earth is 6370 km, mass of Earth is

kg and the universal gravitational constant is

Nm

/kg

. The altitude of the satellite above mean sea level is ___ km. (round off to the nearest integer)

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

A centrifugal air compressor has inlet root diameter of 0.25 m and the outlet diameter of the impeller is 0.6 m. The pressure ratio is 5.0. The air at the inlet of the rotor is at 1 atm and 25°C. The polytropic efficiency is 0.8 and slip factor is 0.92. Use

kJ/kg-K and

. The impeller speed in revolutions per minute (RPM) is __________. (round off to the nearest integer)

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

Consider a cryogenic liquid rocket engine using an expander cycle with liquid hydrogen and liquid oxygen as the two propellants. The mass flow rate of hydrogen

into the combustion chamber is 32 kg/s, and the mass flow rate of oxygen

into the chamber is such that

. The combustion of hydrogen and oxygen is at stoichiometry. Assuming that the rate of the forward reaction is much larger than that of the reverse reaction, the rate of formation of H

O is __________ kmol/s. (round off to the nearest integer)

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