Fluid Mechanics & Thermal Sciences [GATE (Graduate Aptitude Test in Engineering) Mechanical Engineering]: Questions 50 - 52 of 77

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Question 50

Fluid Mechanics & Thermal Sciences
One Dimensional Heat Conduction

Appeared in Year: 2021



In forced convection heat transfer, Stanton number (St) , Nusselt Number (Nu) , Reynolds number (Re) and prandtl number are related as (February Shift 2)


Choice (4)Response





Question 51

Fluid Mechanics & Thermal Sciences
Differential Equations of Continuity and Momentum

Appeared in Year: 2021


Numeric Answer▾

A high velocity water jet of cross section area and velocity = 35 m/s enters a pipe filled with stagnant water. The diameter of the pipe is 0.32 m. This high velocity water jet entrains additional water front the pipe and the total water leaves the pipe with a velocity 6 m/s as shown in the figure.

A High Velocity Water Jet of Cross Section Area

The flow rate of entrained water is litre/s (round off to two decimal places) .

Question 52

Fluid Mechanics & Thermal Sciences
First and Second Laws of Thermodynamics

Appeared in Year: 2020


Numeric Answer▾

Air is contained in a frictionless piston-cylinder arrangement as shown in the figure.

Air is Contained in a Frictionless Piston-Cylinder

The atmospheric pressure is 100 kPa and the initial pressure of air in the cylinder is 105 kPa. The area of piston is . Heat is now added and the piston moves slowly from its initial position until it reaches the stops. The spring constant of the linear spring is 12.5 N/mm. Considering the air inside the cylinder as the system, the work interaction is ________ J (round off to the nearest integer) .

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