GATE AE concept:oblique-shocks PYQs & Answers

Questions 1–7 of 7. Imported answers require independent review unless marked reviewed.

A flow is steady, inviscid and one-dimensional, with no shaft work or body forces. Which of the following is/are possible under the given conditions?

Your answerSelect all correct options. You can choose more than one.

Oblique shocks

Sound propagation

Rayleigh flow

Fanno flow

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

Shock structures for flow at three different Mach numbers over a given wedge are shown in the figure below. Assuming that only the weak shock solutions are possible for the attached oblique shocks, which one of the following options is TRUE?

Diagram for Aerospace Engineering question 43

Your answerChoose one option.

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

A supersonic aircraft has an air intake ramp that can be rotated about the leading edge O such that the shock from the leading edge meets the cowl lip as shown in the figure. Select all the correct statement(s) as per oblique shock theory when the flight Mach number M is increased.

Diagram for Aerospace Engineering question 37

Your answerChoose one option.

It is always possible to find a ramp setting

such that the shock still meets the cowl lip (

remains the same).

is held fixed, the shock angle

will increase.

If M exceeds a critical value, it would NOT be possible to find a ramp setting

such that the shock still meets the cowl lip (

remains the same).

Shock angle

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

Across an oblique shock wave in a calorically perfect gas,

Your answerSelect all correct options. You can choose more than one.

the stagnation enthalpy changes

the stagnation entropy changes

the stagnation temperature changes

the speed of sound changes

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

Which of the following statement(s) is/are true across an oblique shock (in adiabatic conditions) over a wedge shown below?

Diagram for Aerospace Engineering question 14

Your answerSelect all correct options. You can choose more than one.

Total pressure decreases

Mach number based on velocity tangential to the shock decreases

Total temperature remains constant

Mach number based on velocity tangential to the shock remains the same and that based on velocity normal to the shock decreases

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

An oblique shock is inclined at an angle of 35 degrees to the upstream flow of velocity 517.56 m/s. The deflection of the flow due to this shock is 5.75 degrees and the temperature downstream is 182.46 K. Assume the gas constant

J/(kg K), specific heat ratio

, and specific heat at constant pressure

J/(kg K). Using conservation relations, the Mach number of the upstream flow can be obtained as ______ (round off to one decimal place).

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

A supersonic flow in a constant area duct at Mach number

encounters a ramp of angle

(see Figure 1). The resulting oblique shock with shock angle

is then reflected from the top wall. For the reflected shock, the turn angle is

and the shock angle is

Diagram for Aerospace Engineering question 27

Use the weak shock solution from the

plot shown in Figure 2 to choose the correct option from the following.

Diagram for Aerospace Engineering question 27 (figure 2)

Your answerChoose one option.

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

GATE AE concept:oblique-shocks PYQs

How to practice concept:oblique-shocks

Question 30

Question 43

Question 37

Question 25

Question 14

Question 39

Question 27