Pipe sizing for most residential and small commercial buildings using propane is done using which of the following methods?
a. hybrid pressure
b. equivalent length
c. longest run
d. branch length
ANSWER: c
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What are the sides of the right triangle on the type of weld in the previous question called?
What will be an ideal response?
The ridge at the top of the cylinder ________
A) Represents a failure of the top piston ring to correctly seal B) Should not be removed before removing pistons except when reboring the cylinders C) Means that a crankshaft with an incorrect stroke was installed in the engine D) Is caused by the fact that the rings do not travel all the way to the top of the cylinder
The preferred method for raising the pressure of a low pressure chiller in order to test for leaks is:
A) Adding nitrogen to the evaporator. B) Charging the chiller with R-410A. C) Adding more refrigerant. D) Circulating warm water through the chiller.
Which of the following is not part of the parallelogram law?
A. two vectors B. not parallel, drawn to scale C. parallel, drawn to scale D. having the same units, and acting at the same point can be added or subtracted using a specific formula