For a transformer to operate properly, it must:
A) be supplied with the proper AC signal.
B) work within its voltage, current and power ratings.
C) be connected to a load.
D) all of these.
D
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In surface mining at the tops of mountains, ____
a. huge pits are dug to extract the coal b. the use of explosives is not permitted c. the overburden is placed back on the mountain top after the coal is extracted d. the entire top of the mountain is blasted away
The smallest soil particle is _____
A) sand B) clay C) silt D) rock
A pull, wandering, or poor straight-ahead tracking may be caused by all of the following EXCEPT:
a. Worn or loose rack mounting bushings. b. Rack piston seal leaks. c. Binding spool valve. d. Loose or worn tie rod ends.
Which of the following has a cup and a cone?
A. ball-thrust bearing B. angular-contact bearing C. taper-roller bearing D. stave bearing liner