?What material should shielding gas hoses be made of?
A. ?Any material is fine; the gas is inert
B. ?plastic
C. ?rubber
D. ?copper
Answer: B
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As shown in the accompanying figure, backlash is the amount that a tooth space is greater than the engaging tooth on the pitch circles of two gears. Determine the average backlash of a gear with a working depth of 0.7764 inches using this formula: Average backlash = 0.030/P. Round to four decimal places.
What will be an ideal response?
Hand signals for hoisting equipment can only be provided by qualified signal persons and _____.
a. ironworkers b. supervisors c. stationary engineers d. riggers
Technician A says that air bag electrical terminals are copper-plated to protect against corrosion. Technician B says that pretensioners are explosive (pyrotechnic) devices which remove the slack from the seat belt and help position the occupant. Who is right?
A) A only B) B only C) Both A and B D) Neither A nor B
The highest available output for a water boiler is
A) 500,000 BTU. B) 300,000 BTU. C) 50,000,000 BTU. D) 30,000,000 BTU.