Baldor Motor Basics Quiz (USE PDF)

In the USA, utilities that supply AC power to the incoming point of a facility are required to provide power in multiples of how many volts?

• 100 volts

• 110 volts

• 120 volts

• 130 volts

What is the voltage difference between the two "hot" wires in most single-phase residential systems?

• 120 volts

• 240 volts

• 360 volts

• 480 volts

Which type of system is described as having a voltage difference of 240 volts between the three "hot" wires?

• Single-phase system

• 3-phase, 3-wire ungrounded system

• 4-wire grounded wye system

• 3-phase, 4-wire grounded system

What is the typical voltage rating for single-phase motors operating at 120/208 volts in commercial and industrial settings?

• 115 volts

• 230 volts

• 277 volts

• 460 volts

What is the classification of a 3-phase, 3-wire delta connected system operating at 2400 volts?

• Low Voltage

• Medium Voltage

• High Voltage

• Extra High Voltage

What is the typical voltage range for a motor nameplated at 460 volts?

• 506 volts to 414 volts

• 460 volts to 230 volts

• 500 volts to 400 volts

• 480 volts to 220 volts

What is the main issue with using a 230-volt motor on a 208-volt power system?

• The motor will overheat

• The motor will run too fast and overload

• The operating voltage on the motor may not be low enough to run

• The motor will consume more power

What is the new standard voltage in European countries for motors that can run on either a 380-volt system or a 415-volt system?

• 220/380 volts

• 230/400 volts

• 240/415 volts

• 250/440 volts

In table 2, what is the system voltage rating for a 3-phase - 3 wire motor in a 50 Hz power system with a supply voltage of 220 volts?

• 115 volts

• 127 volts

• 220 volts

• 440 volts

In the chart (Typical 3-phase Transformer Connections) which of the following is a 4 Wire Grounded Wye connection in a 3-phase transformer?

• (A)

• (B)

• (C)

• None of the above