Fluid Mechanics & Thermal Sciences [GATE (Graduate Aptitude Test in Engineering) Mechanical Engineering]: Questions 41 - 44 of 77

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Question 41

Fluid Mechanics & Thermal Sciences
Bernoulli's Equation

Appeared in Year: 2020


Numeric Answer▾

Consider a flow through a nozzle, as shown in the figure below.

Consider a Flow through a Nozzle

The air flow is steady, incompressible and inviscid. The density of air is 1.23 kg/. The pressure difference, is ________ kPa (round off to 2 decimal places) .

Question 42

Fluid Mechanics & Thermal Sciences
Vapour Refrigeration Cycle

Appeared in Year: 2021



Ambient pressure, temperature and relative humidity at a location are 101 kPa and 300 K and 60 % respectively. The saturation pressure of water at 300 K is 3.6 kPa. The specific humidity of ambient air is … g/kg of dray air. (February Shift 2)


Choice (4)Response









Question 43

Fluid Mechanics & Thermal Sciences

Appeared in Year: 2019


Numeric Answer▾

A cube of side 100 mm is placed at the bottom of an empty container on one of its faces. The density of the cube is 800 kg/, Liquid of density 1000 kg/ is now poured into the container. The minimum height to which the liquid needs to be poured into the container for the cube to just lift up is ________ mm.

Question 44

Fluid Mechanics & Thermal Sciences
Fluid Properties

Appeared in Year: 2019


Numeric Answer▾

Two immiscible. Incompressible, viscous fluids having same densities but different viscosities are contained between two infinite horizontal parallel plates, 2 m apart as shown below. The bottom plate is fixed and the upper plate moves to the right with a constant velocity of 3 m/s. With the asusmptions of Newtonian fluid, steady, and fully developed laminar flow with zero pressure gradient in all directions, the momentum equations simplify to .

If the dynamic viscosity of the lower fluid, , is twice that of the upper fluid, , then the velocity at the interface (round off to two decimal places) is ________ m/s.

Two Immiscible

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