All of the following statements are true EXCEPT:
A. in four-stroke engines, restrictions in the exhaust can cause backpressure, especially at higher speeds.
B. excessive backpressure increases performance and fuel economy.
C. a small amount of backpressure from the exhaust system is needed to keep the combustion chambers hot enough for more complete combustion.
D. exhaust system flow is not affected in a major way by bends in the pipe as long as the cross-sectional area of the pipe is not diminished.
Answer: B
You might also like to view...
A(n) ____________________ gauge pin is often used as the datum feature simulator for a datum target point.
What will be an ideal response?
The ____ of a field loss relay (FLR) is connected in series with the shunt field.
a. armature b. coil c. phase shift control d. diode
Most vehicle manufacturers specify brake fluid that meets what specification?
A) DOT 2 B) DOT 4 C) DOT 3 D) DOT 5
The walls of the house were built using ________ staggered-stud wood framing, and walls and ceiling/attic are insulated to an R-value of ________
A) 3 x 3, 30 B) 2 x 6, 80 C) 2 x 4, 40 D) 3 x 5, 50