What scenario is indicated by a loss of more than about 2 in. Hg of intake manifold vacuum as the RPM is increased?
A. The level of current flow
B. A 50 percent duty cycle
C. Excessive exhaust backpressure
D. The volume of air entering the engine
Answer: C
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The letter ____ represents the weight per linear foot on the beam.
A. f B. R C. V D. w
To discourage unauthorized entry, handhole covers must be _____.
a. permanently sealed b. provided with a keyed access device or padlock c. heavier than 100 pounds or require tools to open d. equipped with an anti-tamper device such as an audible alarm
The final choice of piping material for many applications, including fuel gases, is often controlled by _____.
a. building codes b. the material cost c. personal preference d. the installing contractor
If a technician needed 5/8" ACR for an installation and was located near only a plumbing supply house, what size and type of pipe should he ask for?
A. 5/8" ACR B. 1/2" PVC C. 1/2" ID Copper D. 5/8" PVC