EBK AUTOMOTIVE TECHNOLOGY: A SYSTEMS AP
6th Edition
ISBN: 8220100474392
Author: ERJAVEC
Publisher: Cengage Learning US
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Chapter 11, Problem 4ASRQ
Technician A uses a pry bar to stretch the timing chain onto its sprockets. Technician B cools the timing sprockets so that the timing chain will slip over the teeth. Who is correct?
- Technician A
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1) Using the half reaction data in Table 11.1), write balanced overall reactions for the
following redox processes. Calculate the E°, peº and delataGº values for each overall
reaction. Indicate whether each reaction is thermodynamically favorable under standard
conditions.
i) Oxidation of Mn2+ to MnO2(s) using 12(aq) to form I-.
ii) Oxidation of Pb(s) to Pb2+ by Zn²+ to form Zn(s).
iii) Oxidation of acetate (CH3COO¯) to CO2 by SO4²¯ to form HS¯.
7
·H+ + e¯ ½-½
>> CH, COO¯ + 1 H₂O E° = 0.075 V
2) Chlorinated solvents such as carbon tetrachloride (CCI4) can be degraded in a process called
reductive dechlorination where Cl atoms are removed and replaced with H atoms. For
example:
CCl4 + H+ +2е¯ CHCl3 + CI Eº = 0.67 V
In the process of in situ bioremediation an electron donor such as acetate (CH3COO¯) is
typically added and is oxidized to provide the electrons for the reduction of CCl4. In
groundwater devoid of oxygen, nitrate typically serves as the electron acceptor. Answer
the questions below using thermodynamics data and that provided above.
i) Can CCl4 could serve as an electron acceptor for acetate?
ii) Which electron acceptor, CCl4 or NO3, would be thermodynamically preferred?
iii) What do the results in i and ii imply for remediation in an aquifer that also
contains nitrate?
Problem 4.3
A thermal power plant plans to replace 20 vol.% of its natural gas by renewable hydrogen
from a nearby facility. In its public announcement, the company claims a corresponding (20%)
reduction in CO2 emissions, which has been challenged by an environmental group. Can you
do necessary calculations to settle the issue and avoid possible public embarrassment for the
company?
(25)
Problem 4.4
Explain the working principle of solid oxide electrolyzer with a suitable sketch and
operating parameters.
(20)
Chapter 11 Solutions
EBK AUTOMOTIVE TECHNOLOGY: A SYSTEMS AP
Ch. 11 - Explain how to use a micrometer to measure cam...Ch. 11 - What is the cylinder taper?Ch. 11 - Describe how to measure main bearing oil...Ch. 11 - Where does maximum cylinder bore wear occur and...Ch. 11 - What type of valve lifter automatically...Ch. 11 - List three types of compression rings.Ch. 11 - Most pistons used today are made of. cast iron...Ch. 11 - Cam bearings in OHV engines are typically which...Ch. 11 - Which of the following is not of concern when...Ch. 11 - True or False? Cylinder taper is the difference in...
Ch. 11 - What is the purpose of a thrust main bearing?Ch. 11 - Each halt' of a split bearing is made slightly...Ch. 11 - Prob. 13RQCh. 11 - Prob. 14RQCh. 11 - Which type of oil ring is slotted so that excess...Ch. 11 - When removing the balance shaft assembly:...Ch. 11 - After installing cam bearings: Technician A checks...Ch. 11 - Technician A says that a cylinder wall with too...Ch. 11 - Technician A uses a pry bar to stretch the timing...Ch. 11 - Technician A installs a cup-type core plug with...Ch. 11 - Technician A uses a micrometer to measure the...Ch. 11 - Technician A says that piston ring end gaps should...Ch. 11 - Technician A checks crankshaft oil clearance with...Ch. 11 - When removing the piston and rod assemblies from a...Ch. 11 - Technician A says that crankshaft counterweights...
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