Monthly Plumbing Quiz: 2022 in Review

Have you been taking CONTRACTOR’s Monthly Plumbing Quiz all year long? If so, this last one should be a breeze!
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1. [History of Plumbing Quiz] Thomas Crapper was a plumber and inventor who set himself up as a sanitary engineer (with his own brass foundry and workshop) in 1861. He is most famous for inventing what?

a. The flush toilet

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c. The flushometer

d. The air admittance valve

Photo Credit: Wikimedia Commons

2. [Tools Quiz] Orbital action has become an important part of the function of most reciprocating saws. What does orbital action refer to?

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b. The orbital locking mechanism for the saw’s blade.

c. It refers to the shape of the Scotch yoke-type drive used in many recip saw designs.

d. Variable speed sensitivity.

Photo: Rober Bosch Tool Corp.

3. [Codes Quiz] According to the Uniform Plumbing Code, the maximum allowable lead content in pipes, pipe fittings, plumbing fixtures and fixtures intended to convey or dispense water for human consumption – with respect to their wetted surfaces -- shall not be more than a weighted average of—

a. 0.15 percent

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c. 0.33 percent

d. 0.5 percent

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4. [OSHA Quiz] Heat-related injuries illness is one of the most common—and preventable—workplace injuries. According to the Bureau of Labor statistics, the average cost per heat prostration incident is—

a. Over $23,000

b. Over $33,000

c. Over $43,000

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5. [Radiant Quiz] One of the reasons that radiant systems are so efficient is that water is a much better thermal conductor than air. Per unit of volume, water has about how many times the specific heat capacity of dry air (at 77 degrees F)?

a. About 32 times

b. About 320 times

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d. About 32,000 times

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