In theory, a mechanical seal should last until _____
A) the spring wears out B) the seal faces separate
C) 40,000 shaft revolutions D) the carbon face has worn away
D
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Which of the following is caused by the presence of slime-producing biologic organisms in the water in an HVAC system?
a. Increased water flow b. Inadequate heat transfer c. Excessive bleed-off d. Excessive cooling
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Ponies generally weigh from _____ to _____ pounds
a. 100; 200 c. 800; 1,000 b. 300; 900 d. 1,200; 2,000
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There are few varieties of bramble fruits, and new varieties are seldom being developed
Indicate whether the statement is true or false
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How does adding humidity to the air in a residence affect the thermostat setting?
What will be an ideal response?
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