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ISRO 2018 Thermodynamics Booster Quiz 4
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Question 1
What will be the net power output and the thermal efficiency? If the rate of waste heat rejection to a nearby river is 70 MW and heat is transferred to a heat engine from a furnace at a rate of 100 MW.
Question 2
Estimate the change in internal energy of this control mass of a tank containing a fluid is stirred by a paddle wheel. The work input to the paddle wheel is 5050 kJ. The heat transfer from the tank is 1600 kJ. Consider the tank and the fluid inside a control surface.
Question 3
What will be the final temperature of a gas if initial and final volume of gas is 0.3 m3 and 0.6 m3 respectively for a perfect gas at pressure of 800 kPa and temp. 600 K is expanded to 2 bar pressure.
Question 4
Which of the following is not a advantage of Vortex Tube (Non-Conventional) refrigeration system?
Question 5
A heat engine is used to drive the refrigerator. Efficiency of heat engine and COP of refrigerator are 60% and 5 respectively. Heat input (in kJ/sec) needed to the heat engine from the higher temperature source for each ton of refrigeration is
Question 6
A fan is to accelerate quiescent air to a velocity of 12 m/s at a rate of 3 m3/sec. If the density of air is 1.15 kg/m3, the minimum power that must be supplied to the fan is _____ Watt.
Question 7
A Carnot engine discharges 3kJ of heat into low temperature reservoir for every 2kJ of work output. If sink temperature is 27 °C then the value of source temperature is
Question 8
An engine working on Otto cycle consumes 16 litres of gasoline per hour and develops 50 kW. The specific gravity of gasoline is 0.75 and its calorific value is 44000 kJ/kg. What will be the thermal efficiency (in %) of the engine?
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