A formula that applies to a two-branch parallel circuit is ________
A) IT = IR1 + IR2 B) RT = V1 ÷ R2 C) VT = VR1 + VR2 D) RT = R1 + R2
A
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When transferring refrigerants from a cylinder to a refrigeration system or any other container, you should always wear ____.
A. goggles with side shields and gloves B. heavy protective clothing C. rubber gloves D. industrial steel-toed shoes and an insulated cap
Technician A says that as much as 50% of the air needed by the engine at idle speed flows through the PCV (positive crankcase ventilation) system. Technician B says that PCV tests include the rattle test, card test, snap-back test, and crankcase vacuum test. Which technician is correct?
A) Technician A B) Technician B C) Both technicians D) Neither technician
Analog distance sensors are available in photoelectric and ultrasonic configurations. Select the true statement
A) The photoelectric are the most accurate. B) The ultrasonic are less sensitive to environmental conditions. C) The photoelectric models have the greatest distance sensing capability. D) Ultrasonic sensor have been developed quite recently.
Why are multiple NAND gates often used in place of other single function gates?
A) It makes it possible to use spare portions of NAND IC packages to implement other logic functions, perhaps reducing the total IC package count. B) It is easier to design logic circuits with a single gate type, since you only have to fully understand how one type of gate works. C) NAND gates are cheaper than any other type of gate. D) NAND gates are packaged more densely on IC's than other types of gates.