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UP Polytechnic Lecturer: Mechanical Quiz 18

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Question 1

A rolling disc of radius ‘r’ and mass ‘m’ is connected to one end of a linear spring of stiffness ‘k’, as shown in the figure below. The natural frequency of oscillation is given by which one of the following?

Question 2

In a multiple- disc clutch, the axial intensity of uniform pressure is not to exceed 0.2Mpa. The inner radius of the discs is 100mm and is half the outer radius. The axial force per pair of contact surfaces in N is

Question 3

If a material expands freely due to heating, it will develop

Question 4

An engine working on Carnot cycle rejects 40% of absorbed heat from the source, While the sink temperature is maintained at 27°C, then the source temperature is

Question 5

The atmospheric air at 760 mm of Hg. dry bulb temperature 15 °C and wet bulb temperature 11 °C enters a heating coil whose temperature is 41 °C if the by-pass factor of the heating coil is 0.5, then what will be the dry bulb temperature of the air leaving the coil?

Question 6

For the radation between two infinite parallel planes of emissivity

and

respectively, which one of the following is the following is the following is the expression for emissity factor?

Question 7

In an axial flow compressor, when the degree of reaction is 50%, it implies that

Question 8

For a Irrotational flow, the equation that govern’s the two dimensional unsteady flow is given by;

Question 9

The process of removing the burrs or flash from a forged component in drop forging is called

Question 10

Match List-I with List-II and select the correct answer using the code given below the lists:
List-I
[A]. System
[B]. Phase
[C]. Phase equilibrium
[D]. Components
List-II
[1]. Free energy is a minimum
[2]. Chemical elements or chemical compounds
[3]. Consists of solids, liquids or gases or their combination
[4]. Homogeneous portion of a system that has uniform physical characteristics

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AE & JE Exams Mechanical Engineering

Oct 28AE & JE Exams