A technician pushes a 50-lb box 4 feet in 2 seconds. The work done is:
A) 50 lb × 4 ft = 200 ft-lb. B) 4 ft-lb.
C) 200 ft-lb/2 s = 100 ft-lb/s. D) 50 lb.
A
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Cooling water can be supplied directly from the building's water system, or it can be supplied from a ____.
A. recirculation system B. feed system C. piping system D. ventilation system
You irrigated 0.75 acre of tomatoes. The system you used under standard pressure of 35 pounds per square inch (psi) had a flow rate of 1.05 gallons per minute (gpm). Each nozzle covered a circular area with a radius of 20 feet. You applied 1 acre-inch per week by applying 1/3 of it on three different days of the week. (Note: 1 acre-inch = 27,154 gal.)
a. How many square feet are in 0.75 acre? b. How many square feet does one nozzle cover? c. How many nozzles will be needed to cover 0.75 acre? d. What is the flow rate when all the nozzles are used? e. How many hours did take to have 1 acre-inch coverage on 0.75 acre? f. How many hours did it take to apply the water needed in one of the three days if you have a 10 percent loss?
How long must a torque wrench be so that a technician applying 50 pounds of force can create 125 lb?ft of torque?
What will be an ideal response?
When removing bearings using a puller, pressure should only be applied to the _____
a. outer race b. inner race c. shaft d. collar