Technician A says a that voltmeter can be used to monitor the output signal of an optical sensor. Technician B says that optical sensors should be tested with an oscilloscope because of the sensor's speed. Which technician is correct?
A) Technician A only
B) Technician B only
C) Both technicians
D) Neither technician
B
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?An overhead cam (OHC) head has oil galleries. This makes it impractical to clean these heads with a glass bead _____.
What will be an ideal response?
The most accurate method of charging a small appliance that holds less than a lb of refrigerant is to add:
A) Liquid into the system until the pressure equals the saturation pressure and temperature. B) Vapor with the system not operating up to a specified static pressure at a specified ambient temperature. C) Vapor into the low side with the system operating while checking the compressor amp draw. D) Liquid into the system with the system off until the liquid stops going in.
The type of high-intensity discharge (HID) lamp that has excellent color rendition is the _____.
a. metal halide lamp b. high-pressure sodium lamp c. mercury vapor lamp d. low-pressure sodium lamp
Answer the following statement(s) true (T) or false (F)
A crown is an arc in along the length of a board.