What do the beams of a ladder directly support?
a. halyard
b. rungs
c. roof hooks
d. fly
Answer: b. rungs
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Which of the following statements about retarders are correct
a. Retarders help slow a vehicle, reducing the need for braking. b. You should turn the retarder off whenever the road is wet, icy, or snow-covered. c. When your drive wheels have poor traction, the retarder may cause them to skid. d. All of the above statements are correct.
What prevents the water in a cooling tower from freezing in cold weather?
What will be an ideal response?
Given the power law, power equals what?
What will be an ideal response?
According to Pascal?s law, _____
a. pressure produced in a liquid transmits force equally in all directions b. liquids compress in the same manner as gases c. a confined liquid does not transmit pressure d. hydraulic fluid does not expand