The total resistance of four resistors in parallel with values of 3, 10, 25, and 50 ohms is _____.
a. 1.66 ohms
b. 2.03 ohms
c. 2.75 ohms
d. 3.33 ohms
c. 2.75 ohms
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El índice de eficiencia más bajo de un cable con un empalme mecánico, guardacabo o bucle, es del _____.
a. 70% b. 75% c. 80% d. 100%
While performing a starter draw test on a car, it is noted that the starter has a slow cranking speed and a lower than normal amperage draw. What is the most likely cause?
A. worn starter brushes B. worn starter bushings C. incorrect ignition timing D. hydrolocked engine
Thermostatic expansion valves respond to changes in:
A) Superheat. B) Pressure. C) Temperature. D) Subcooling.
Undersized suction lines:
A) Can reduce system efficiency because of a high pressure drop. B) Can cause poor oil return because of high refrigerant velocity. C) Can cause poor oil return because of low refrigerant velocity. D) Can reduce system efficiency because of a low pressure drop.