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DMRC 2018 Mechanical Engineering Quiz 14

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Question 1

On completion of heat treatment, the austenite structure would be retained if :

Question 2

A nail of mass 0.015 kg is driven into a fixed wooden block, Its initial speed is 25 m/s and it is brought to rest in 6ms. Find the impulse.

Question 3

The condenser and evaporator tubes in a Freon refrigeration plant are made of ____.

Question 4

Kinetic theory of gases assumes that the collisions between the molecules are ____.

Question 5

Calculate the tolerance unit if diameter of steps are 60 mm and 80 mm_______.

Question 6

Find the revolution per minute(rpm) of a rolling wheel like that shown in Fig, Where V_A = 90.5 kmph and r = 25 cm

Question 7

Critical or whirling speed is the speed at which the shaft tends to vibrate violently in __.

Question 8

From the lists given below, choose the most appropriate set of heat treatment process and the corresponding process characteristics ______.

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Question 9

The given structure is designed to be used for construction of heavy duty crane arm. The following truss is:

Question 10

In actual refrigeration systems, the compressor handles vapour only. What is this process commonly referred to as ___________.

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Jul 31ESE & GATE ME