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# GATE 2022 ME: RAC, PPE & IC Engines Quiz - 9

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Question 1

Which of the following is not an effect of friction in steam nozzle?

Question 2

What is the critical pressure ratio for isentropic nozzle flow with ratio of specific heats as 1.5?

Question 3

At the stagnation point in nozzles

Question 4

The velocity of a gas flowing through a duct is 300 m/s; its temperature is 127 °, Gas constant R = 0.25 kj/kg K, the ratio of specific heat is Cp/Cv = = 1.6. What is the value of Mach number?

Question 5

Choked flow through an isentropic nozzle implies
1. Discharge is maximum
2. Discharge is zero
3. Nozzle exit pressure critical pressure
4. Mach number at the throat is unity
Which of the above statements are correct?

Question 6

In an isentropic flow of air, the stagnation temperature is 500 K. If the value of Mach number of the flow is 3, then the temperature at that section in flow will be ___________.
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