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SSC JE 2019 - 20 Technical quiz 36

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Question 1

In a steam power plant the work output and the pump work are 1000 kJ/kg and 10 kJ/kg respectively. The net work ratio is

Question 2

Carburising flame is used to weld metals like __________.

Question 3

A circular disc rolls down an inclined plane, the fraction of its total energy associated with its rotation is ______________.

Question 4

In ammonia-water vapour absorption refrigeration system

Question 5

In ASA system, if 10 – 8 – 6 – 6 – 10 – 12 - 2 mm, then principle cutting edge angles is

Question 6

Haematite iron ore contains iron about

Question 7

Once-through boilers operate at

Question 8

Which of the following is NOT correct?

Question 9

The equivalent evaporation (kg/hr.) of a boiler producing 2000 kg/hr. of steam with enthalpy content of 2426 kJ/kg from feed water at temp 40ºC (liquid enthalpy = 168 kJ/kg; enthalpy of vaporization of water at 100ºC = 2258 kJ/kg) is:

Question 10

Which phenomenon will occur when the valve at the discharge end of a pipe connected to a reservoir is suddenly closed?

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