A three-phase circuit has a line-to-neutral voltage of 120 volts. What is the line-to-line voltage?
A) 85 volts.
B) 300 volts.
C) 208 volts.
C) 208 volts.
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The R-value of a single glass sheet, without considering the film resistances, is approximately
A) 2.0. B) 1.0. C) 4.0. D) 3.0. E) 0.
An alternator could test as producing lower-than-normal output, yet be okay, if the ________
A) Battery is weak or defective B) Any of the above C) Drive belt is loose or slipping D) Engine speed is not high enough during testing
Two variables that have a great impact on the system performance of air-conditioning systems are:
A) High-side pressure and airflow across the condenser. B) Airflow across the condenser and condenser water flow. C) High-side pressure and condenser water flow. D) Return-air wet-bulb temperature and the airflow across the evaporator.
Match the pressures in psia to the correct equivalent. (Use 15 as the conversion between psia and psig.)
A. 10 psia B. 85 psia C. 8 psia D. 0 psia E. 20 psia F. 25 psia