If an R-12 refrigeration system has its air-cooled condensing unit on a roof with an ambient air temperature of 100°F and the condenser outlet temperature (refrigerant) is 115°F, with how much subcooling is the condenser operating?

A. 15°F
B. 30°F
C. 100°F
D. 130°F


Answer: A

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____ is any item that is considered finish trim or finish woodwork.

A. Flatwork B. Finishwork C. Millwork D. Woodwork

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The centerline of a nozzle is to be placed at 58 degrees from top dead center (TDC) on a tank with a measured circumference of 540??. How many inches from TDC is the centerline of the nozzle to be located?

a. 58 inches b. 76-1/4 inches c. 87 inches d. 110-3/16 inches e. 140 inches

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The break in insulation where two sections butt against each other is called a _____.

a. tangential joint b. longitudinal joint c. circular joint d. circumferential joint

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Why is genetic engineering preferred over traditional breeding methods among scientists for producing new varieties of plants and animals?

What will be an ideal response?

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