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Thermodynamics Practice Test: Work and Heat Transfer
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Work and Heat Transfer topics include: Work transfer, conduction & radiation, heat transfer and other types of work transfer. In thermodynamics, work and heat are two fundamental concepts used to analyze energy transfer.  Heat and work are two different ways of transferring energy between systems. Heat is associated with the random motion of particles, while work is associated with ordered motion in one direction.  The first law of thermodynamics can be used to analyze the relationship between work and heat. The formula for internal energy is:  ΔU = Q + W  Where: ΔU: is the internal... Show more
Thermodynamics Practice Test: Work and Heat Transfer
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25 Questions

1. When the clearance volume is at minimum level,
2. Which of the following is true for a centrifugal compressor?
3. The power available at crankshaft is always _____ indicated power.
4. The vane type compressor requires ____ the Roots blower.
5. Cyclic integral of a property is always
6. Clearance is given by
7. In the equation dV=(1/p)dW, (1/p) is known as
8. Heat flow into a system is taken to be ____, and heat flow out of the system is taken as ____
9. Macroscopic properties p and V are significant only for
10. In a thermally insulated kitchen, a refrigerator with 2 kW motor for running the compressor provides 6000 kJ of cooling to the refrigerated space during 30 min operation. If the condenser coil placed behind the refrigerator rejects 8000 kJ of heat to the kitchen during the same period, calculate the change in internal energy of the kitchen.
11. An escalator raises a 100 kg bucket of water 10 m in 60 seconds. Determine the amount of work done during the process.
12. For a two-stroke engine, work done in one minute is given by
13. In a multi-stage compression,
14. Find the rate of conduction heat transfer through a 1.5 cm thick board(k = 0.16 W/m K), with a temperature difference of 20°C between the two sides.
15. In a cylinder, infinitesimal amount of work done by the gas on piston is given by
16. Find the rate of conduction heat transfer through a 1.5 cm thick hardwood board, k = 0.16 W/m K, with a temperature difference between the two sides of 20°C.
17. The intermediate pressure which produces minimum work also results in
18. Increasing the pressure ratio, increases the volumetric efficiency.
19. The area of the indicator diagram represents the magnitude of the
20. .The flow work is significant only in"
21. The current flow, I, in amperes, is given by I=(dC)/(dτ)
22. As the car slows down, the brake shoe and steel drum continuously absorbs 25 W. Assume a total outside surface area of 0.1 m2 with a convective heat transfer coefficient of 10 W/Km2 to the air at 20°C. How hot does the outside brake and drum surface become when steady conditions are reached?
23. For a constant pressure process, work done is
24. A burning wood in the fireplace has a surface temperature of 450°C. Assume the emissivity to be 1 and find the radiant emission of energy per unit area.
25. For a given pressure ratio, volumetric efficiency is zero when maximum clearance is