AUTOMOTIVE TECHNOLOGY TECH MANUAL
7th Edition
ISBN: 9781337794220
Author: ERJAVEC
Publisher: CENGAGE L
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Chapter 6, Problem 5MC
Technician A uses a digital volt/ohmmeter to test amperage. Technician B uses the same tool to test resistance. Who is correct?
- Technician A
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Hydrogen (H₂) is considered a clean energy carrier. For its use as a fuel, hydrogen is stored at 5 bar insidea cylindrical tank made of nickel (Ni) with 7 cm inner diameter, 1.2 mm thickness, and the length of L. Thetank is maintained at 358 K. Unfortunately, a small amount of hydrogen diffuses out of the tank, slowlydepleting its contents. You may assume that the hydrogen pressure outside the tank is essentially zero andconvective resistance inside and outside of the cylinder is negligible.• Solubility of H2 in Ni at 358 K = 0.00901 kmol/m3·bar• DH2, Ni at 358 K = 1.2 x 10-12 m2/sCalculate the maximum length of the nickel tank wall to ensure that the hydrogen loss does not exceed0.01 kg per year.
You just took out a cold soda can (at 1 oC) from the refrigerator. Calculate thetemperature of the soda can after the can is placed in a room (at 31 oC, h = 100 W/m2-K) for 60 mins (we all know that soda tastes much better when it is cold!). • k = 0.617 W/m-K, density = 996 kg/m3, Cp = 4178 J/Kg-K• Height = 10 cm & Diameter = 5 cmCalculate the temperature of the soda can surface at the middle point of the heightusing 2-D analysis.
A thick nickel wall is exposed to pure 5 bar H2(g) at 85 oC on one side of its surface (13 pts).(a) Assuming thermodynamic gas-solid equilibrium, calculate the H2 concentration at the surface ofthe nickel wall. (b) Assuming that the concentration of H2 at the surface is constant, determine the concentration ofH2 at the penetration depth in percentage of its concentration at the wall surface
Chapter 6 Solutions
AUTOMOTIVE TECHNOLOGY TECH MANUAL
Ch. 6 - Explain why testlights are not recommended for...Ch. 6 - Name the two basic types of compression gauges.Ch. 6 - What tool is used to test engine manifold vacuum.Ch. 6 - Describe two methods of trapping asbestos/brake...Ch. 6 - True or False? A compression gauge will show the...Ch. 6 - True or False? A lab scope is a visual voltmeter...Ch. 6 - True or False? A brake shoe adjusting gauge is an...Ch. 6 - Prob. 1MCCh. 6 - Technician A says that a brake drum micrometer has...Ch. 6 - Technician A says that a pyrometer measures...
Ch. 6 - Prob. 4MCCh. 6 - Technician A uses a digital volt/ohmmeter to test...Ch. 6 - Technician A says that a charging station removes...Ch. 6 - Which of the following statements about manifold...Ch. 6 - When conducting an oil pressure test: Technician A...Ch. 6 - Which of the following conditions can be revealed...Ch. 6 - Technician A uses a high-impedance testlight on...Ch. 6 - Technician A says that a sulfated and plugged fuel...Ch. 6 - The tests conducted by a scan tool can also be...Ch. 6 - When using a fuel injector pulse tester....Ch. 6 - To measure engine cranking current, a DNIM...Ch. 6 - While discussing a clutch alignment tool....Ch. 6 - Technician A says that ball joints may be pressed...Ch. 6 - Which of the following is not a suitable way to...Ch. 6 - Prob. 18MC
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