The most common cause of roller chain failure is:
A. Sideplate fatigue.
B. Roller fatigue.
C. Crystallization embrittlement.
D. Lack of lubrication.
D
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Which of the following is true for a 30 second on delay type time delay relay 40 seconds after power applied to the coil?
A) The NC contacts are closed. B) The NO contacts are closed. C) The instantaneous contacts are open. D) The coil is not energized. E) None of the above.
What is the inductive reactance of an inductor that drops 12 VRMS and carries 50 mARMS?
A) 60 ? B) 240 ? C) 600 ? D) 6 ?
What is the technician doing in this illustration?
A) Checking end play
B) Testing bolt torque
C) Adjusting end play
D) Separating the cases
In a cable tray when the minimum spacing is maintained, a(n) ____________________ cable tray is frequently required.
Fill in the blank(s) with the appropriate word(s).