Free 2022 GATE Mechanical Engineering Quiz

GATE Exam Quiz-01

Let's practice this mini quiz, comprising only 10 Questions from Theory of Machines, Heat Transfer, Manufacturing, and Fluid Mechanics.

1 / 10

A sprue hole is _____.

a hold made for riveting

a casting defect

an opening in the mould for pouring molten metal

a blind hole in jigs

2 / 10

The assumption made in Fourier's law is that the heat flow

A. Is in steady-state
B. Through a solid medium in one dimension

Only (A)

None of these

Both (A) and (B)

Only (B)

3 / 10

The process of heat transfer from a hot body to a cold body in a straight line, without affecting the intervening medium, is known as ______.

Convection

Conduction

All of these

Radiation

4 / 10

For ductile materials, the most appropriate failure theory is _____.

Maximum shear stress theory

Maximum principal stress theory

Maximum principal strain theory

Shear strain energy theory

5 / 10

Two insulating materials of thermal conductivity K and 2K are available for lagging a pipe carrying a hot fluid. If the radial thickness of each material is the same _____.

It is immaterial in which sequence the insulating materials are used

Material with lower thermal conductivity should be used for the inner layer and one with higher thermal conductivity for the outer

None of these

Material with higher thermal conductivity should be used for the inner layer and one with layer and one with lower thermal conductivity for the outer

6 / 10

Which of the following processes would produce the best components?

hot rolling

die casting

extrusion

forging

7 / 10

Which surface will have the least emissivity?

Concrete

Smooth glass

Plaster

Aluminium foil

8 / 10

Whirling speed of a shaft coincides with the natural frequency of the _____.

Coupled between torsional vibration

Transverse vibration

Longitudinal vibration

Torsional vibration

9 / 10

The ratio of the thickness of the thermal boundary layer to the thickness of the hydrodynamic boundary layer is equal to (Prandtl number) n, where n is_____.

-1

1

-1/3

2/3

10 / 10

Heat is transferred from an electric bulb by ______.

All of these

Radiation

Convection

Conduction

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