Hearing protection should be worn any time the noise level exceeds _________
A) 70 dB B) 90 dB C) 60 dB D) 80 dB
B
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Thermostats with bimetal sensing elements typically use a combination of copper or brass and _____.
a. Elinvar® b. nickel c. Invar® d. aluminum
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The _____ method uses a specially designed welding machine that can provide a rapidly pulsing current.? ?
Fill in the blank(s) with the appropriate word(s).
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What is the most frequently used type of electric space heater for residential and commercial buildings?
A) Convection baseboard electrical heaters B) Suspended forced air heaters C) Infrared electric heaters D) Cabinet-style electric heaters
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Laws in Canada require vehicles to operate with _____ on during the daytime.
A. clearance lights B. daytime running lights C. tail lights D. all of the above
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