Automotive Technology: A Systems Approach (MindTap Course List)
6th Edition
ISBN: 9781133612315
Author: Jack Erjavec, Rob Thompson
Publisher: Cengage Learning
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Chapter 14, Problem 10ASRQ
While diagnosing the cause of air bubbles in the coolant recovery tank: Technician A checks for a bad head gasket. Technician B checks the radiator cap. Who is correct?
- Technician A
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The following chemical reaction takes place at 500K and 1 atm and the products leaves at 1000K aCH4 + b(O2 + 3.76N2)=7.7CO2 + 0.5CO + 2CH4+2.95O2 + 86.85N2 + cH2O use the specific heat capacity given in Table A-21 (Moran and Shapiro, page 755) and the heat of formation given in Tabble A-25 (Moran and Shapiro, page 763) determine: 1. The stoichiometric coefficients (a, b, and c) 2. The air-fuel ratio on a molar basis 3. The air-fuel ratio on a mass basis 4. The stoichiometric air fuel ratio 5. The excess air (%) 6. The lower heating value 7. The rate of heat transfer from the combustion chamber.
3. Nitric oxide is produced in the body by several different enzymes and acts as a
signal that controls blood pressure, long-term memory, and other critical functions.
The major route for removing NO from biological fluids is via reaction with O2 to
give NO₂
2NO(g) + O2(g) → 2NO2(g)
The following table lists kinetics data for the reaction of NO with O2 at 25°C:
Experiment
1
[NO] (M)
0.0235
2
0.0235
3
0.0470
4
0.0470
(a) Determine the rate law for the reaction
(b) calculate the rate constant.
[02]0 (M)
Initial Rate (M/s)
0.0125
7.98 × 10-3
0.0250
15.9 × 10-3
0.0125
32.0 × 10-3
0.0250
63.5 x 10-3
5:32
A closed system of 122 moles of an ideal gas with constant-pressure heat capacity of cp = 2.5R expands isobarically from 52°C and 4.9 bar to 137°C, with a thermodynamic efficiency of 0.74.
How much total work is involved in this process?
Please report your answer to the nearest whole kJ and don't forget the sign: "-" if the work is negative, no sign if the work is positive.
Chapter 14 Solutions
Automotive Technology: A Systems Approach (MindTap Course List)
Ch. 14 - What is the most efficient way to increase a...Ch. 14 - True or False? Oil pressure is determined by...Ch. 14 - Describe the simple test used to determine whether...Ch. 14 - Which of the following is a function of the...Ch. 14 - What is ECD and what can result from it?Ch. 14 - True or False? To eliminate the drain of engine...Ch. 14 - For every pound of pressure put on engine coolant,...Ch. 14 - Which is not a typical method of driving the water...Ch. 14 - Which of the following is not an effective way to...Ch. 14 - Explain why a pressure relief valve is needed in...
Ch. 14 - List five problems that can be caused by engine...Ch. 14 - Cooling system hoses should be replaced when they...Ch. 14 - True or False? The presence of air in the cooling...Ch. 14 - Which of the following is not a true statement...Ch. 14 - Describe the procedure for using air bleed valves...Ch. 14 - Technician A uses a feeler gauge and straightedge...Ch. 14 - Technician A says that excessive engine oil...Ch. 14 - While checking for conditions that might cause...Ch. 14 - When installing an oil pump in an engine...Ch. 14 - Technician A says that if the PCV valve or...Ch. 14 - While bleeding air from a cooling system:...Ch. 14 - While diagnosing an engine that overheats after...Ch. 14 - While performing a cooling system service on a...Ch. 14 - While discussing the causes of extreme engine...Ch. 14 - While diagnosing the cause of air bubbles in the...
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