Why is lubricant spayed onto the underside of aluminum pistons?
A. To assist in keeping piston crown temperatures lower.
B. To lower ignition temperatures.
C. Because moving cylinders provide splash circulation of oil.
D. It is the only method available to lubricate wrist pins.
Answer: A
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An approximate formula generally used in determining the tread dimension (T) and riser dimension (R) in a stair is _______.
An approximate formula generally used in determining the tread dimension (T) and riser dimension (R) in a stair isA) 2T + 2R = 24 in. to 25 in. B) R +T = 24 in. to 25 in. C) 2R +T = 24 in. to 25 in. D) 2T +R = 24 in. to 25 in. E) none of the above.
Answer the following statement(s) true (T) or false (F)
1. More often than not, the conversion process from one type of energy to another is a complex one that requires many intermediate steps. 2. Frictional heat causes surface atoms to give up their valence electrons, giving rise to accumulated, nonmoving charges known as static electricity. 3. The word cell refers to a basic arrangement of a chemical substance, the electrolyte, interacting with two similar electrodes. 4. Most of the life-sustaining energy encountered on our planet is derived from the sun in the form of heat and light energy. 5. Thermoelectric effects utilizing temperature differentials to generate an electrical voltage have been known only since the 1950s.
What schematic symbol is shown in the accompanying figure?
a. Transformer
b. Lamp
c. Single-Phase Squirrel-Cage Motor
d. Three-Phase Squirrel-Cage Motor
?Buffer tank sizing depends on the acceptable temperature rise of buffer tank water during the time the heat pump is off.
Answer the following statement true (T) or false (F)