Test: Work & Heat Transfer - 1 - Mechanical Engineering MCQ
10 Questions MCQ Test - Test: Work & Heat Transfer - 1
A closed system receives 60 kJ heat but its internal energy decreases by 30 kJ, Then the work done by the system is
If the work done on a closed system is 20 kJ/kg, and 40 kJ/kg heat is rejected from the system, its internal energy decreases by
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The integrating factor of quasi-static displacement work is
The integrating factor of reversible heat transfer is
Heat transferred to a closed stationary system at constant volume is equal to
Which among the following is not a boundary phenomenon?
In a general compression process, 2 kJ of mechanical work is supplied to 4 kg of fluid and 800 J of heat is rejected to the cooling jacket. The change in specific internal energy would be
The following data refer to a 6-cylinder, single- acting, two-stroke diesel engine:
Speed-250 rpm
Cylinder diameter - 0.7 m
Stroke of a piston - 1.2 m
Area of indicator diagram - 5.5 x 10-4 m2
Length of diagram - 0.06 m
Spring value -144 MPa per m
What is the net rate of work transfer from the gas to the pistons in kW?
A piston-cylinder device with air at an initial temperature of 289C undergoes an expansion process for which pressure and volume are related as given below:
What is the work done by the system?
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