When a mobile crane is being moved without direction from the rigger, three travel signals from the crane's
horn mean the _____.
a. boom is rising
b. crane is stopping
c. crane is moving forward
d. crane is traveling in reverse
d
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In order for the control circuit to perform its desired function, the pressure switch must contain six different contacts, three normally closed and three normally open.
Answer the following statement true (T) or false (F)
What type of heat exchanger is air-cooled and works like a radiator in a car?
A) Reboiler B) Fin fan C) Plate and frame D) Double pipe
A forester planted 3 acres in seedlings the first day, 5 acres the second day, and 4 acres the third day. If 3 acres of the seedlings were destroyed by fire, how many acres of seedlings remain?
What will be an ideal response?
Explain the principle of magnetism upon which electric motors operate
What will be an ideal response?