Which of the following are paths water can follow after it falls to earth?
a. Percolation
b. Transpiration
c. Precipitation
d. Runoff
A, B, D
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Unpainted steel surfaces and edges can be protected by rubbing on a layer of ____________________
Fill in the blank(s) with the appropriate word(s).
When the oil pressure drops to between 3 and 7 psi, the oil pressure lamp lights by _________
A) Shorting the circuit B) Grounding the circuit C) Conducting current to dash lamp by oil D) Opening the circuit
In the HVAC/R industry, __________ are often used to shift sections of metal ductwork during installation to prevent surface damage.
A. ball peen hammers B. cold chisels C. rubber mallets D. wooden mallets
In a car, the indicated horsepower developed by gasoline is 100. Only 88 horsepower is available for actual work. What is the mechanical efficiency?
A. 44% B. 66% C. 88% D. 99%