Being certified does not mean that a welder can weld everything, nor does it mean that every weld that is made is acceptable.
Answer the following statement true (T) or false (F)
True
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A refrigerator using a 0.5 hp motor has a coefficient of performance of 3.05. 2 gallons of tea (model as water) is placed into the refrigerator at 80oF. How long will it take for the refrigerator to cool the tea to 40oF, assuming that this is the only heat load to be considered. Does this seem realistic? If not, what assumptions were made which make the calculation appear unrealistic?
Given: ?= 3.05; W?= -0.5 hp = 0.3534 Btu/s; Water: V= 2 gal = 0.2674 ft3; T1 = 80oF; T2 = 40oF Assume: The refrigerator is operating in a cyclic fashion. The water behaves as an incompressible substance with constant specific heats: c = 1 Btu/lbm-RSolution: What will be an ideal response?
Seeds are produced in sugar beet in the:
a. first year c. third year b. second year d. fourth year
The number engraved on the nozzle indicates ____.
A. how many gallons of air per hour the nozzle will deliver regardless of input pressure B. how many foot pounds of pressure must be used to properly tighten the nozzle C. how many gallons of oil per hour the nozzle will deliver at a given input pressure D. the stock number of the part
The first electrical checks of a system that is not operating generally involve:
A) Ohming out key components. B) Replacing all system capacitors. C) Adding refrigerant. D) Checking the power circuit to the equipment.