To protect hands:
A) Keep them out of danger by thinking about safety
B) Wear gloves
C) Clean chips with a brush instead of hands
D) Both A and C
D
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Refer to the accompanying figure. When starting the DC motor, as the ____________________ builds across the armature, it acts like a resistor that drops a larger percentage of the applied voltage, thus providing a voltage drop for the A coil and the A contacts 3–4 close to bypass current around the starting resistor.
Fill in the blank(s) with the appropriate word(s).
?Why is the water pressure on water cooled torches kept below 35 psi (241 kg/mm2)?
A. ?To limit the amount of water that is wasted. B. ?To slow the flow of water through the gun. C. ?Higher pressures produce higher water flows, and that can cool the welding too much so it would be harder to get a stable arc. D. ?Higher water pressures can burst the hoses.
Repeat Problem 19-7 using two different depths of untreated aggregate bases of 6” and 12”. Highway contractors in your area can furnish rates for providing and properly laying an asphalt concrete surface and untreated granular base. Assume a structural coefficient of 0.12 for the base course. If these rates are available, determine the cost for constructing the different pavement designs if the highway section is 5 miles long and the lane width is 12 ft. Which design will you select for construction?
What will be an ideal response?
The temperature of the water returning to a chiller used for comfort cooling is typically about _____
a. 35°F b. 45°F c. 55°F d. 65°F