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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Two technicians are discussing thermistors: Technician A says that thermistors change resistance as temperature changes. Technician B says thermistors are often used as computerinput sensors. Who is correct?
A. Technician A B. Technician B C. Both A and B D. Neither A nor B
To transfer elevations up a structure, first establish a temporary benchmark at the base, then locate a second temporary benchmark at the desired floor or level using a(n) _____.
a. builder's level b. auto level c. laser level d. tape
Some electrodes may not remove the deposits ahead of the molten weld pool, resulting in ____.
A. discontinuities within the weld B. burnthrough C. excessive spatter D. electrode discoloration
The product of 5 and 7 is equal to the sum of seven 7s.
Answer the following statement true (T) or false (F)