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ISRO ME 2019 Thermodynamics Booster Quiz -4

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Question 1

When two systems are in thermal equilibrium with a third system, they are in thermal equilibrium with each other, this law is known as

Question 2

A pure substance of mass 5kg at 5 MPa and 300 K has internal energy and  enthalpy 15000 kJ and 20000 kJ respectively. The specific volume of the substance is ____ m3/kg.

Question 3

An air standard Brayton cycle operating between the temperature limits of 300 K and 1500 K. For maximum work output, what will be the pressure ratio and thermal efficiency (in%) of the cycle respectively?

Question 4

Which of the following is a water tube boiler ________.

Question 5

In a spark ignition engine working on the ideal Otto cycle, the compression ratio is 5.5. The work output per cycle (i.e., area of the P-V diagram) is equal to 23.625 × 105 × VJ, where Vc is the clearance volume in m3. The indicated mean effective pressure is

Question 6

The degree of saturation for dry air is ___________.

Question 7

For one-ton refrigeration capacity of the plant, if the heat rejection ratio of condenser is 1.4, the COP of the plant is __________.

Question 8

What is the refrigerant in Lithium Bromide Refrigeration system?

Question 9

A mixture of ideal gas consists of 2 kg of nitrogen and 8 kg of carbon dioxide at a pressure of 250 KPa and temperature of 30oC. The equivalent gas constant (in KJ/KgK)
of the mixture is

Question 10

One kg of air is compressed to half the volume at constant pressure, the change in entropy (kJ/kg-K) will be
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Apr 12ESE & GATE ME