Refrigeration and Air Conditioning Technology (MindTap Course List)
8th Edition
ISBN: 9781305578296
Author: John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Publisher: Cengage Learning
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Chapter 18, Problem 8RQ
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The bevel gear shown in is subjected to the force F which is caused
from contact with another gear.
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F (201+8j 15k) N
40 mm
Determine the moment of this force about the y axis of the gear shaft.
Express your answer with the appropriate units.
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Units
30 mm
Consider the beam in.
Part A
1.5 ft
200 lb
200lb
2 ft
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1.25 ft
30°
If F 90 lb, determine the resultant couple moment.
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Express your answer in pound-feet to three significant figures. Assume the positive direction is counterclockwise.
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lb.ft
4. An operating parameter often used by power plant engineers is the heat rate. The heat rate is
defined as,
HR
Qbioler
Wnet
where Qbioler is the heat transfer rate (Btu/h) to the water in the boiler due to the combustion of a
fuel and Wnet is the net power (kW) delivered by the plant. In comparison, the thermal efficiency
of the power plant is defined as,
nth
Wnet
Qbioler
where the numerator and denominator have the same units. Consider a power plant that is
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Determine the heat rate and thermal efficiency of this power plant.
Chapter 18 Solutions
Refrigeration and Air Conditioning Technology (MindTap Course List)
Ch. 18 - Prob. 1RQCh. 18 - Power supply data should include the...Ch. 18 - Prob. 3RQCh. 18 - Prob. 4RQCh. 18 - Prob. 5RQCh. 18 - In the United States, the frequency in cycles per...Ch. 18 - Prob. 7RQCh. 18 - Prob. 8RQCh. 18 - An open single-phase motor with a centrifugal...Ch. 18 - Prob. 10RQ
Ch. 18 - Prob. 11RQCh. 18 - Prob. 12RQCh. 18 - Prob. 13RQCh. 18 - Prob. 14RQCh. 18 - Prob. 15RQCh. 18 - What is a matched set of belts?Ch. 18 - Name the different types of belts.Ch. 18 - Prob. 18RQCh. 18 - An instrument often used to check the alignment of...Ch. 18 - Why must resilient-mount motors have a ground...Ch. 18 - A belt-driven blower assembly is equipped with a...Ch. 18 - Prob. 22RQCh. 18 - Prob. 23RQCh. 18 - Prob. 24RQ
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