Fundamentals of Thermal-Fluid Sciences
5th Edition
ISBN: 9780078027680
Author: Yunus A. Cengel Dr., Robert H. Turner, John M. Cimbala
Publisher: McGraw-Hill Education
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Chapter 2, Problem 40P
To determine
The gage pressure and absolute pressure in
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C
A cylindrical piece of steel 38 mm (1½ in.) in
diameter is to be quenched in moderately agi-
tated oil. Surface and center hardnesses must be
at least 50 and 40 HRC, respectively. Which of
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1040, 5140, 4340, 4140, and 8640? Justify your
choice(s).
Using the isothermal transformation diagram for a 1.13 wt% C steel alloy (Figure 10.39),
determine the final microstructure (in terms of just the microconstituents present) of a small
specimen that has been subjected to the following time-temperature treatments. In each case
assume that the specimen begins at 920°C (1690°F) and that it has been held at this
temperature long enough to have achieved a complete and homogeneous austenitic structure.
(a) Rapidly cool to 250°C (480°F), hold for 103 s, then quench to room temperature.
(b) Rapidly cool to 775°C (1430°F), hold for 500 s, then quench to room temperature.
(c) Rapidly cool to 400°C (750°F), hold for 500 s, then quench to room temperature.
(d) Rapidly cool to 700°C (1290°F), hold at this temperature for 105 s, then quench to room
temperature.
(e) Rapidly cool to 650°C (1200°F), hold at this temperature for 3 s, rapidly cool to 400°C
(750°F), hold for 25 s, then quench to room temperature.
(f) Rapidly cool to 350°C (660°F), hold for…
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Chapter 2 Solutions
Fundamentals of Thermal-Fluid Sciences
Ch. 2 - Prob. 1PCh. 2 - You are trying to understand how a reciprocating...Ch. 2 - A can of soft drink at room temperature is put...Ch. 2 - What is the difference between intensive and...Ch. 2 - Is the weight of a system an extensive or...Ch. 2 - Prob. 6PCh. 2 - Prob. 7PCh. 2 - Prob. 8PCh. 2 - Prob. 9PCh. 2 - Prob. 10P
Ch. 2 - Prob. 11PCh. 2 - What is specific gravity? How is it related to...Ch. 2 - Prob. 14PCh. 2 - Prob. 15PCh. 2 - Consider two closed systems A and B. System A...Ch. 2 - Prob. 17PCh. 2 - Prob. 18PCh. 2 - Prob. 19PCh. 2 - Prob. 20PCh. 2 - The temperature of ambient air in a certain...Ch. 2 - Prob. 22PCh. 2 - Explain why some people experience nose bleeding...Ch. 2 - A health magazine reported that physicians...Ch. 2 - Someone claims that the absolute pressure in a...Ch. 2 - Express Pascal’s law, and give a real-world...Ch. 2 - Prob. 27PCh. 2 - Prob. 28PCh. 2 - Prob. 29PCh. 2 - The pressure in a water line is 1500 kPa. What is...Ch. 2 - Prob. 31PCh. 2 - A manometer is used to measure the air pressure in...Ch. 2 - The water in a tank is pressurized by air, and the...Ch. 2 - Prob. 34PCh. 2 - Prob. 35PCh. 2 - The gage pressure in a liquid at a depth of 3 m is...Ch. 2 - The absolute pressure in water at a depth of 9 m...Ch. 2 - Prob. 38PCh. 2 - Prob. 39PCh. 2 - Prob. 40PCh. 2 - Prob. 41PCh. 2 - Prob. 42PCh. 2 - Prob. 44PCh. 2 - Prob. 45PCh. 2 - Reconsider Prob. 2–45. Using an appropriate...Ch. 2 - Both a gage and a manometer are attached to a gas...Ch. 2 - Prob. 48PCh. 2 - A manometer containing oil (ρ = 850 kg/m3) is...Ch. 2 - A mercury manometer (ρ = 13,600 kg/m3) is...Ch. 2 - Repeat Prob. 2–50 for a differential mercury...Ch. 2 - The pressure in a natural gas pipeline is measured...Ch. 2 - Prob. 53PCh. 2 - Prob. 54PCh. 2 - The maximum blood pressure in the upper arm of a...Ch. 2 - Prob. 56PCh. 2 - Prob. 57PCh. 2 - Prob. 58PCh. 2 - Prob. 59PCh. 2 - Prob. 60PCh. 2 - Prob. 61PCh. 2 - Prob. 62PCh. 2 - Prob. 63PCh. 2 - Prob. 64PCh. 2 - Prob. 65RQCh. 2 - Prob. 66RQCh. 2 - Prob. 67RQCh. 2 - Prob. 68RQCh. 2 - Prob. 69RQCh. 2 - Joe Smith, an old-fashioned engineering student,...Ch. 2 - It is well-known that cold air feels much colder...Ch. 2 - Prob. 72RQCh. 2 - A vertical piston–cylinder device contains a gas...Ch. 2 - Prob. 74RQCh. 2 - Prob. 75RQCh. 2 - Prob. 76RQCh. 2 - Prob. 77RQCh. 2 - Determine the maximum amount of load, in kg, the...Ch. 2 - Prob. 79RQCh. 2 - Prob. 80RQCh. 2 - Prob. 81RQCh. 2 - Prob. 82RQCh. 2 - Prob. 83RQCh. 2 - Prob. 84RQCh. 2 - Prob. 85RQCh. 2 - Prob. 86RQCh. 2 - Prob. 87RQCh. 2 - Prob. 88RQ
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