What is the most important reason NOT to wear jewelry when working on air conditioning equipment?
A. shows vanity
B. might offend customers
C. could lose the jewelry
D. creates risk of potential electrical shock
Answer: D
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Which of the following factors does not affect boiler operation?
A) Pressure B) Temperature C) Water level D) Viscosity of water
If an ADC is missing codes, the analog output versus digital input will look like
A) nonsymmetrical sine wave. B) uneven sawtooth wave. C) missing stair steps. D) ramp function.
Simply stated, for an N-bit DAC the number of different levels will equal 2n, and the number of steps will equal 2n - 1
Indicate whether the statement is true or false
In a water-cooled condenser, what do an increase in head pressure and an increase in temperature difference across the condenser indicate?
A) Fouled condenser B) Biological fouling C) Scaling on tubing D) Low water flow