When doing service entrance calculations, 1 volt-ampere equals __________.
a. 1 joule
b. 1 watt
c. 1 ohm
d. 1 mil
b. 1 watt
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A reinforced concrete beam measures 12 in. × 24 in. in cross section. If the density of reinforced concrete is 1 50 lb/ft3, the weight of the beam is
A) 300 lb/ft3. B) 450 lb/ft. C) 300 lb. D) 300 lb/ft. E) 350 lb/ft.
FFA began in Montreal
Indicate whether the statement is true or false
Technician A says that all temperature sensors are PTC devices that decrease in resistance as the temperature increases. Technician B says that some vehicle manufacturers use a stepped ECT circuit inside the PCM to broaden the accuracy of the sensor. Which technician is correct?
A) Technician A only B) Technician B only C) Both technicians D) Neither technician
What is the purpose of the zinc rod used in steel boilers?
A) It acts as a flame safety device B) It prevents corrosion by reacting with corrosive elements before they attack the boiler C) It acts as an electrical ground for safety purposes D) It cycles the burner by sensing the water temperature