NYC RMO EXAM, CHAPTER 23 (Electricity
Fundamentals) questions with verified answers
23.01.) A motor is operating from a 120 volt power source; it is drawing 30 amps
and has a resistance of 4 ohms. How many kilowatts it is consuming at full load?
Ans✓✓-3.6
23.02.) For a single test device to qualify as a multi-meter, which of the following
electrical units must be measured? Ans✓✓-Voltage, amperage, resistance
23.03.) Which of the following best describes the power source used by a two
horsepower induction motor? Ans✓✓-Three phase power source
23.04.) In a 208 volt, 3 phase 4 wire electrical power supply for a small air
conditioning unit, which statement regarding the power across neutral line and
either; L1, L2 or L3 is most correct? Ans✓✓-Has a potential with respect to
ground of 120 volts
23.05.) Which of the following formulas is used to determine the power
consumed by a compressor's crankcase heater? Ans✓✓-watts= V x I
23.06.) Which of the following power sources is commonly used for lighting in a
modern commercial building? Ans✓✓-277v 1 phase
23.07.) In order to test a motor for a grounded or shorted winding what electrical
test instrument will be used? Ans✓✓-Ohmmeter
Fundamentals) questions with verified answers
23.01.) A motor is operating from a 120 volt power source; it is drawing 30 amps
and has a resistance of 4 ohms. How many kilowatts it is consuming at full load?
Ans✓✓-3.6
23.02.) For a single test device to qualify as a multi-meter, which of the following
electrical units must be measured? Ans✓✓-Voltage, amperage, resistance
23.03.) Which of the following best describes the power source used by a two
horsepower induction motor? Ans✓✓-Three phase power source
23.04.) In a 208 volt, 3 phase 4 wire electrical power supply for a small air
conditioning unit, which statement regarding the power across neutral line and
either; L1, L2 or L3 is most correct? Ans✓✓-Has a potential with respect to
ground of 120 volts
23.05.) Which of the following formulas is used to determine the power
consumed by a compressor's crankcase heater? Ans✓✓-watts= V x I
23.06.) Which of the following power sources is commonly used for lighting in a
modern commercial building? Ans✓✓-277v 1 phase
23.07.) In order to test a motor for a grounded or shorted winding what electrical
test instrument will be used? Ans✓✓-Ohmmeter
