A common unit used in the United States in air-conditioning and refrigeration systems is ton of refrigeration or cooling. One ton of refrigeration represents the capacity of a refrigeration system to freeze
a. 1000 lbm of liquid water at 32°F into 32°F ice in one hour.
b. 2000 lbm of liquid water at 32°F into 32°F ice in 24 hours.
c. 1000 lbm of liquid water at 32°F into 32°F ice in 24 hours.
d. 2000 lbm of liquid water at 32°F into 32°F ice in one hour.
b. 2000 lbm of liquid water at 32°F into 32°F ice in 24 hours.
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Briefly describe the traditional electric grid.
What will be an ideal response?
Why is a gore pattern valuable for covering a spheroidal shape?
a. It is least wasteful of materials. b. It permits flat materials to cover a curved surface. c. It is the easiest pattern to use. d. It is the only pattern that works.
All of the following statements are true EXCEPT:
A. machinists use a pin press to separate pressed-fit pins and pistons from their connecting rods. B. pistons have a notch on the side of the piston head that faces the front of the engine. C. always soak a piston and rod assembly in a chemical cleaner. D. reinstallation is done using a rod heater to heat the eye of the rod.
Troubleshooting is a matter of progressing logically through a circuit.
Answer the following statement true (T) or false (F)