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 14, Problem 2RQ
Why are the torque and horsepower of an engine equal at 5252 RPM?
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02/ Choose the correct answer from below
1- With an increase of the number of cylinders in a multi cylinder engine the power to weight ratio
(a) Decreases. (b) Increases. (c) Remains unaffected. (d) None of the mentioned.
2- Maximum torque is generated by an engine when
(a) it runs at lowest speed (b) it develops maximum power
(c) it consumes maximum fuel (d) it runs at maximum speed
3- The brake power (B.P.) of the engine is given by (where W Brake load or dead load in newtons, L Length
of am in meters, N= Speed of engine in r.p.m., S Spring balance reading in newtons, D Dia. of brake drum
in meters, and d Dia. of rope in meters).
a) B.P (WL x 2aNV60 watts b) B.P = [(W- S) nDNJ/60 watts
c) B.P [(W-S) a (D+d) NJ/60 watts
4- It is assumed that all the processes of an air standard cycle are
(a) Reversible.
5- The volumetric efficiency of a well-designed engine may be.
(a) 30 to 40%
d) All of these.
(b) Irreversible.
(c) Adiabatic.
(d) Isothermal.
(b) 40 to 60%.
(c) 60 to 70% (d) 75 to…
02/ Choose the correct answer from below
1-With an increase of the number of cylinders in a multi cylinder engine the power to weight ratio
(a) Decreases. (b) Increases. (c) Remains unaffected. (d) None of the mentioned.
2- Maximum torque is generated by an engine when
(a) it runs at lowest speed (b) it develops maximum power
(c) it consumes maximum fuel (d) it runs at maximum speed
3- The brake power (B.P.) of the engine is given by (where W= Brake load or dead load in newtons, L= Length
of arm in meters, N = Speed of engine in r.p.m., S= Spring balance reading in newtons, D = Dia. of brake drum
in meters, and d Dia. of rope in meters).
a) B.P = (WL x 2RNV60 watts b) B.P= [(W-S) RDNJ60 watts
e) B.P = [(W - S) a (D+d) NJ/60 watts
4- It is assumed that all the processes of an air standard cycle are
(a) Reversible. (b) Irreversible. (c) Adiabatic.
5- The volumetric efficiency of a well-designed engine may be.
(a) 30 to 40%. (b) 40 to 60% (c) 60 to 70% (d) 75 to 90%.
%3D
d) All of these.…
Does the speed change as the engine is loaded? What is the reason? Please explain.
Chapter 14 Solutions
Automotive Technology: Principles, Diagnosis, and Service (5th Edition)
Ch. 14 - What is the formula for determining fuel economy?Ch. 14 - Why are the torque and horsepower of an engine...Ch. 14 - What service operation may require the technician...Ch. 14 - What service operation may require the technician...Ch. 14 - Prob. 5RQCh. 14 - What math function is needed to calculate the...Ch. 14 - Prob. 1CQCh. 14 - Which of the following shows the relationship of...Ch. 14 - Prob. 3CQCh. 14 - Prob. 4CQ
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