Which installation phase is performed last?
A) Evacuation and charging B) Start and check
C) Ductwork installation D) Piping installation
B
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Which of the following is the only EPA-approved refrigerant that can be used for leak testing?
a. HFC-410A b. HFC-134a c. HFC-407C d. HCFC-22
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If a solvent ingredient name includes "________," it is likely to be hazardous
A) "chlor" B) "fluor" C) Either A or B D) Neither A nor B
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Slip joint pliers can be used in how many positions?
A) Two B) Six C) One D) Four
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If the most significant bit (MSB) of a four-bit binary-weighted resistor D/A converter connects to a 2.5 K resistor, which resistor is needed for the least significant bit (LSB)?
A) 7.5 k? B) 10 k? C) 20 k? D) 5.0 k?
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