Practice quiz Unit 5

The electrical circuit shown below is

• Parallel circuit    

•    Series circuit

• Shunt circuit

• Multiple circuits

The electrical circuit shown below is

• Parallel circuit    

•    Series circuit

• Shunt circuit

• Multiple circuits

What is the type of the circuit shown in the picture below:

•   series-parallel circuit 

      

•    parallel- series circuit 

• series circuit 

• parallel circuit

The below circuit shows the street lights connected in series. One lamp is damaged and one wire is jumpered before the damaged lamp. What will happen?

• The remaining lamps will continue working  

•    The damaged lamp will work

• The remaining lamps will not be working

• The entire circuit will be switched off

Which of the following statement is correct?

• In parallel circuits, the current is maintained constant and the generated emf varies with the load

• In series circuits, the current through the generator varies with the load and the generator emf is maintained practically constant.

• In shut circuits, the current is maintained constant and the generated emf varies with the load

• In series circuits, the current is maintained constant and the generated emf varies with the load

The below figure illustrates a railway car with 15 incandescent lamps. Every 5 lamps make one circuit and they are connected in series. If the operating voltage for each lamp is 140 V, what is the operating voltage for each group?

• 700 V

• 600 V

• 30 V

•  150 V

It is not a good practice to supply lamps and large motors from the same circuit. Which of the following is NOT the correct reason?

• When the motors are started, the large starting current causes a voltage drop on the feeder, which will make the lights grow dim or blink.

• Overloads and short circuits are more common on motor circuits and should not be the cause of putting the lights out.

• When the motors are started, the small starting current causes a voltage drop on the feeder, which will make the lights grow dim or blink.

• Frequently it is more economical to operate motors on a higher voltage than that of the lighting circuit.

What refers to the set of conductors in a distributing system extending from the original source of energy to a distributing center and having no other circuits connected to it between the source and the center

• Feeder

•   Main

• Submain

• Branch

In the figure below the energy is generated, transmitted, and distributed as alternating current throughout, the highlighted area refers to:

•   Generation

• Transmission

• Distribution

• Interior wiring

Choose the correct answer

• Two-phase four-wire

•   Two-phase three-wire

• Three-phase three-wire (-connection)

• Three-phase four-wire (Y-connection)