Which gas can be used an indicator of a lean condition?
A. Carbon monoxide (CO)
B. Oxygen (O2)
C. Carbon dioxide (CO2)
D. Hydrogen (H)
Answer: B
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? Identify and state the historical significance of assumption.
What will be an ideal response?
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Most large wound rotor motors use a method of ____ as opposed to actual variable resistors.
a. full voltage starting b. soft starting c. step starting d. reduced voltage starting
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Which type of heat transfer occurs in a gas-fired water heater tank when the burner is not firing and tends to move hot water toward the top of the tank?
a. conduction b. convection c. radiation d. emissivity
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The polarization index is commonly used for motors over _____.
a. 200hp b. 240hp c. 280hp d. 300hp
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