Expansion fittings are generally provided in exposed runs of Type PVC where __________.
a. the run is long
b. the run is subject to large temperature variations during or after installation
c. expansion and contraction measures are provided for the building or other structures
d. All of the above
d. All of the above
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Technician "A" says that a fusible link can be jumped out temporarily to allow the customer to get heat until the next business day. Technician "B" says that if the fuses keep on blowing on an electric duct heater, the fan may be defective. Which of the following statements is correct?
A. Technician "A" is correct. Technician "B" is correct. B. Technician "A" is correct. Technician "B" is incorrect. C. Technician "A" is incorrect. Technician "B" is correct. D. Technician "A" is incorrect. Technician "B" is incorrect.
Many technicians always use new pushrods because ________
A) They are less expensive to buy than clean B) They wear at both ends C) Pushrods shrink in length if removed from an engine D) All dirt cannot be cleaned out from the hollow center
Ultrasonic leak detectors detect refrigerant leaks by:
A) Seeing the refrigerant by sensing the effect that the leaking refrigerant gas has on sonar. B) Seeing the change in infrared radiation around the area of the leak. C) Seeing the change in ultra-violet radiation around the area of the leak. D) Hearing the high frequency of the escaping gas.
The abbreviated designation for output current with a LOW output is
A) IIH. B) IOH. C) OOL. D) IOL.