Which of the following describes a brake in which the braking force is the upstroke of the engine piston on its compression stroke?
A. exhaust brake
B. service brake
C. external compression brake
D. internal compression brake
Answer: D
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For smoke chamber definition purposes, if the space between the top of a low wall and the ceiling is less than 18", the wall is considered a(n) _____.
a. open grid b. boundary c. barrier d. beam pocket
A(n) _________________________ is a break in an electrical conductor or cable.
Fill in the blank(s) with the appropriate word(s).
It takes 50 pounds of force to move a 100 pound block of wood across the floor. The coefficient of friction is ________
A) 1.0 B) 0.5 C) 1.5 D) 2.0
Which of the following is NOT verified in the troubleshooting of switches?
A) The switching distance is correct. B) If the state of the contacts can be changed. C) The resistance of closed contacts. D) The physical state of the contacts.