Automotive Technology: Principles, Diagnosis, and Service (5th Edition)
5th Edition
ISBN: 9780133994612
Author: James D. Halderman
Publisher: PEARSON
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Textbook Question
Chapter 22, Problem 1RQ
What property of oil does the SAE ratings reflect?
Expert Solution & Answer
To determine
Mention the property of oil defined by the SAE ratings.
Explanation of Solution
Society of Automotive Engineers (SAE) rating:
SAE rating rates motor oils based on their viscosity. Most engine oils are sold with the SAE grade number. The viscosity of the oil determines the effectiveness and burning rate of the oil. Higher the SAE rating of the oil, higher will be the viscosity of the oil.
The vehicle manufacturers suggest the following viscosity engine oils:
- SAE 0W-16
- SAE 0W-20
- SAE 5W-20
- SAE 5W-30
Therefore, viscosity is the property of oil defined by the SAE ratings.
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6. If the 50-kg load A is hoisted by motor M so that the load has a constant velocity of 1.5
m/s, determine the power input to the motor, which operates at an efficiency € = 0.8.
1.5 m/s
2
7. The sports car has a mass of 2.3 Mg, and while it is traveling at 28 m/s the driver causes
it to accelerate at 5m/s². If the drag resistance on the car due to the wind is FD= 0.3v²N,
where v is the velocity in m/s, determine the power supplied to the engine at this instant.
The engine has a running efficiency of P = 0.68.
8. If the jet on the dragster supplies a constant thrust of T-20 kN, determine the power
generated by the jet as a function of time. Neglect drag and rolling resistance, and the loss
of fuel. The dragster has a mass of 1…
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Question 1
The engine of a 3500-N car is generating a constant power of 50 hp (horsepower)
while the car is traveling up the slope with a constant speed. If the engine is
operating with an efficiency of € 0.8, determine the speed of the car. Neglect
drag and rolling resistance. Use g 9.81 m/s² and 1 hp = 745.7 W.
10
го
Question 2
A man pushes on a 60-N crate with a force F. The force is always directed downward at an angle of 30°
from the horizontal, as shown in the figure. The magnitude of the force is gradually increased until the crate
begins to slide. Determine the crate's initial acceleration once it starts to move. Assume the coefficient of
static friction is μ = 0.6, the coefficient of kinetic…
state is
Derive an expression for the volume expansivity of a substance whose equation of
RT
P
=
v-b
a
v(v + b)TZ
where a and b are empirical constants.
Chapter 22 Solutions
Automotive Technology: Principles, Diagnosis, and Service (5th Edition)
Ch. 22 - What property of oil does the SAE ratings reflect?Ch. 22 - Prob. 2RQCh. 22 - Why is the oil filter bypassed when the engine oil...Ch. 22 - What are the steps in performing an oil change?Ch. 22 - The W in SAE 5W-20 means ___________. a. weight b....Ch. 22 - Oil change intervals as specified by the vehicle...Ch. 22 - Most conventional (mineral) oil is made from what...Ch. 22 - Which rating is the ACEA rating specified for use...Ch. 22 - Prob. 5CQCh. 22 - Technician A says that some vehicle manufacturers...
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