One of the first widely used dynamic seals, which needs some leakage is the:
A. mechanical seal
B. lip seal
C. stuffing box
D. labyrinth seal
C
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If a transformer has 200 turns in the primary, 100 turns in the secondary, and 150VAC applied to the primary, the voltage across the secondary is _____.
a. 75VAC b. 90VAC c. 120VAC d. 140VAC
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As an operational safety check, the equipment rooms for combustion appliances should be checked for high:
A) Nitrogen levels. B) Carbon monoxide levels. C) Oxygen levels. D) Carbon dioxide levels.
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The EGR system is designed to lower which exhaust emission?
A) CO2 B) NOx C) CO D) HC
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Showing empathy with a customer means that you are _____
a. establishing good communication b. putting yourself in their shoes c. listening carefully to what they say d. getting them to approve of you
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