GATE ME 2025 Paper 1 — page 17

Questions 49–51 of 65. Imported answers require review unless explicitly marked reviewed.

A pitot tube connected to a U-tube mercury manometer measures the speed of air flowing in the wind tunnel as shown in the figure below. The density of air is 1.23 kg m

while the density of water is 1000 kg m

. For the manometer reading of

mm of mercury, the speed of air in the wind tunnel is __________ m s

(rounded off to 1 decimal place). Assume: Specific gravity of mercury =13.6. Acceleration due to gravity = 10 m s

Diagram for Mechanical Engineering question 49

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Consider a velocity field

, where

is a constant. If the flow is irrotational, the value of

is __________ (rounded off to 1 decimal place).

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Water enters a tube of diameter, D = 60 mm with mass flow rate of 0.01 kg s

as shown in the figure below. The inlet mean temperature is

K and the uniform heat flux at the surface of the tube is 2000 W m

. For the exit mean temperature of

K, the length of the tube, L is ________ m (rounded off to 1 decimal place).

Use the specific heat of water as 4181 J kg

Diagram for Mechanical Engineering question 51

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2025 · Paper 1

Question 49

Question 50

Question 51