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BHEL ET 2019: Technical Quiz 6

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Question 1

In I.C . engine, removing the burnt gases from combustion chamber of engine cylinder, is known as :

Question 2

The maximum speed and minimum speed in r.p.m. at a Watt governor are 72 and 68 respectively. The range of speed of the governor is :

Question 3

A solid metal bar of uniform diameter D and length L is hung vertically from a ceiling. If the weight density of the material of the bar is ρ and the modulus of elasticity is E, then the total elongation of the bar due to its own weight is

Question 4

The main criterion for selection of electrode diameter in arc welding is:-

Question 5

In the flange coupling the two flanges are coupled together by means of bolts fitted in ___________.

Question 6

In a shell and tube heat exchanger, baffles are provided on the shell side to ________.

Question 7

Low specific speed of a pump implies that it is

Question 8

For the two shafts connected in parallel, find which statement is true?

Question 9

Which of the following is not a casting defect?

Question 10

The shock absorbing capacity of a bolt can be increased by _______.

Question 11

When heat is transferred from one particle of a hot body to another by actual motion of the heated particles, it is referred to as heat transfer by:

Question 12

Heat is transferred from an electric bulb by ___________.

Question 13

In order to achieve maximum heat dissipation, the fin should be designed in such a way that

Question 14

When the spring of a watch is wound it posses ______.

Question 15

Gear teeth are made harder to avoid

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