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BHEL ET 2019: Technical Quiz 2

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Question 1

An Otto cycle with compression ratio of 6 have 800kJ/kg of heat energy supplied in constant volume heat addition process. What is work done(kJ) by burning per kg of fuel?

Question 2

For SHM motion of cam & follower, the maximum velocity of the follower is, where , h= rise of follower, = angle turned by crank, ф= crank rotation for maximum follower displacement.

Question 3

In a tensile test a bar is subjected to a uniform tensile force. The point in the stress strain curve at which the cross section of the specimen starts decreasing is

Question 4

In MCU (Machine Control Unit) of codes written for a CNC machines. What does the letter H stands for?

Question 5

A shell and tube heat exchanger is used for cooling purpose in a chemical industry for a processing plant. The heat exchanger transfer enthalpy between two fluids, if no phase change occurs in any of the fluids the heat exchanger is referred as,

Question 6

A plate is placed longitudinally in a stream of crude oil having specific gravity of 0.8 which flows with a velocity of 8m/sec and has Reynolds Number of 18750. Find the magnitude of shear stress on the plate.

Question 7

The product of power and time is known as

Question 8

What causes failure of boiler tube?

Question 9

Which of the following theorem is used for the equilibrium of the body applied with three concurrent coplanar forces

Question 10

According to Bernoullis equation

Question 11

With increase in temperature, thermal conductivity of air _________.

Question 12

Stud and projection welding belong to the following category of welding _____.

Question 13

Poisson’s ratio is defined as the ratio of:

Question 14

A Kinematic Chain is known as mechanism when

Question 15

Internal irreversibility of Rankine cycle is caused by?
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