__________ are used to measure very low pressures and sometimes vacuums on air conditioning, heating and refrigeration systems.
A. Anometers
B. Manometers
C. Thermometers
D. Volt-ohm milliammeters
Answer: B
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The continuity through a heat relay is checked using a(n) ____.
A. ohmmeter B. voltmeter C. clamp-on ammeter D. micron gauge
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One of the most important groups of microscopic animals in the soil is nematodes
Indicate whether the statement is true or false
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How is soot formed?
A) From a suction leak B) From an excessive over-fire draft C) From a clogged bypass plug D) From incomplete combustion
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Brass is a mixture of ____________________ and ____________________
Fill in the blank(s) with the appropriate word(s).
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