NLC Final Egrid 2

Which of the following statements about parallel circuits is true?

• The current in a parrallel circuit stays the same, while the voltage changes at different points in the circuit

• The voltage in a parallel circuit stays the same, while the current changes at different point in the circuit

• The resistance in a parallel circuit stays the same, while the voltage changes at different points in the circuits

• The current in a parallel circuit stays the same, while the reistance changes at different points in the circuits

Which is true about a delta system?

• System voltage is higher than coil voltage

• Coil voltage in the same as system voltage

• Coil voltage is higher than system voltage

• System voltage is lower than coil voltage

Which of the following statements about systems is true?

• Single-phase tap lines on delta systems consist of two phases

• In the field, four-wire wye systems and delta systems are identical in appearance

• The neutral is extended throughout the circuit

• Today, wye systems exist only in insolated

If the applied voltage is 12,000 volts, what is the current draw for the 15 KVA transformer?

• 2 amps

• 1.25 amps

• 2.08 amps

• 3.47 amps

In the above graphic, the current is 6.6 amps and each streetlight is 200 watts. How much voltage does the transformer have to supply to push 6.6 amps through each streetlight?

• 242.4 volts

• 1320 volts

• 792 volts

• 403.03 volts

If the voltage is 120 volts and each light bulb is 15 ohms, what is the current?

• 8 amps

• 16 amps

• 15 amps

• 4 amps

If the applied voltage is 19,900 volts, what is the current draw at the line switch?

• 3.47 amps

• 1.25 amps

• 2 amps

• .75 amps

If the voltage is 120 volts and bulb #2 is 80 watts, what is the current at bulb #2?

• 1.16 amps

• .66

• .5

• 1.5 amps

Refer to the above graphic and choose the closest possible answer to phase current.

• 24

• 83

• 28

• 48

Refer to the above graphic and choose the closest possible answer to coil current.

• 23

• 26

• 33

• 45