____ voltage controls are simply controls that do not employ the use of a control transformer to change the voltage to a lower value.
A. Varistor
B. Line
C. Three-wire
D. Float
Answer: B
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An emergency brake must be controlled by
a. Mechanical force. b. Air pressure. c. Gravity.
The removal of all remaining combustion gasses from a boiler after firing is accomplished by ___________
A. pre-purge B. post purge C. blow down D. water washing
Asphalt, fiberglass, and wood are the most typical types of shingles used as roofing materials.
Answer the following statement true (T) or false (F)
A driver should take all of the following steps to secure his or her rig EXCEPT:
A. use a battery kill switch B. when dropping a trailer, use a padlock whenever possible C. check the electronic tracking systems regularly to be sure they have not been dismantled by criminals D. use tractor and trailer brake-locking devices