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NLC Technical Quiz 31

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Question 1

A carnot heat pump works between temperature limits of 177 ºC and 27 ºC. Its COP is __.

Question 2

There is a two-stage compressor with ideal intercooling. The intermediate pressure (P₂) in terms of condenser pressure (P₁) and evaporator pressure (P₃) for the minimum work is

Question 3

Rankine’s theory is good for____.

Question 4

In the calculation of induced shear stress in helical springs, the Wahl’s correction factor us used to take care of

Question 5

The wet bulb depression is zero, when relative humidity is equal to

Question 6

Which of the following measuring device is used to measure cutting force.

Question 7

Boundary layer flow seperates from the surface if

Question 8

A body that reflects all the incident thermal radiations is called a

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