A-6 Electrical ASE Test Preparation   


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Electrical Basics

1. The particles that orbit around the center of an atom are

Electrons.
Molecules.
Nucleus.
Protons

 

2. An atom which loses or gains one electron is called:

Balanced.
An element.
A molecule.
A charged particle or ion.

 

3. The conventional theory of current flow says that current flows:

Randomly.
Positive to negative.
Negative to positive.
None of the above.

 

4. The force that causes electrons to flow through a conductor is known as:

the power.
the current.
the voltage.
the resistance.

 

5. Two identical lamps are connected in parallel to a 12-volt source. The voltage across each lamp is:

12 volts.
6 volts.
4 volts.
2 volts.

 

6. In a parallel circuit which of the following is true:

circuit resistance decreases as additional branches are added.
current is equal in all parts of the circuit.
only one current path to ground.
none of these.

 

7. A break or interruption in an electrical circuit is:

an open.
a short.
a ground.
none of the above.

 

8. The sum of voltage drops in a series circuit equals the:

voltage across the largest load.
voltage across the smallest load.
source voltage.
shunt circuit voltage.

 

9. Technician A says circuit protection devices are sensitive to current. Technician B says they are sensitive only to voltage. Who is correct?

Technician A only.
Technician B only.
both Technician A and Technician B.
neither Technician A nor Technician B.

 

10. Several lamps are connected in parallel to a voltage source. If one light burns out, all the other lamps:

will go out.
will get brighter
will not be affected.
will get dimmer.

 

11. The strength of the magnetic field that surrounds a single conductor with current flowing though it ?

is usually weak.
varies directly with the amount of current flowing through the conductor.
can be detected using a magnetic compass.
all of these.

 

12. When the lines of a magnetic force cut across a conductor:

a voltage is induced into the conductor.
the conductor is permanently induced.
the conductor is permanently magnetized.
magnetism is induced into the conductor.

 

13. The color code (band 1 to 4) for a 2-Watt, 100-ohms resistor with a tolerance of 5% is:

brown, black, brown, gold.
black, brown, black, silver.
brown, red, orange, gold.
orange, brown, black, silver.

 

14. When applying solder to a splice connection:

the solder is applied directly to the soldering tip.
the solder is applied at the instant that the heat is applied.
the solder is applied to the splice after it has been heated for a few seconds.
both b and c.

 

15. The three leads of a bipolar transistor are:

the anode, the base, and the cathode.
the base, the collector, and the emitter.
the emitter, the gate, and the anode.
the grid, the anode, and the cathode.

 

16. Technician "A" says a diode is used to control the direction of current flow. Technician "B" says diodes cannot be used to control voltage spike across an inductor. Who is correct?

Technician A.
Technician B.
Both Technicians A & B.
Neither Technicians A nor B.

 

17. Technician "A" says a relay is used to control a small amount of current with a large amount of current. Technician "B" says a relay is used to create a voltage drop in a control circuit. Who is correct?

Technician A.
Technician B.
Both Technicians A & B.
Neither Technicians A nor B.

 

18. Thermistors are used to provide information on:

pressure.
temperature.
speed.
position.

 

19. The specified voltage output from an electrical device is 0.55 volts. Technician A says this is equivalent to 5.5 millivolts. Technician B says it is equivalent to 550 millivolts. Who is correct

Technician A.
Technician B.
Both Technicians A & B.
Neither Technicians A nor B.

 

20. Which of the following factors does NOT affect the strength of an electromagnet?

the type of core.
the direction of the windings.
the amount of current flow.
the number of turns in the coil.

 

21. In a closed circuit with a capacitor, current will continue to flow until the voltage charge across the capacitor plates:

Becomes less than the source voltage.
Becomes equal to the source voltage.
Becomes greater than the source voltage.
Becomes equal to the resistance of the plates.

 

22. In this relay:

Terminal 1 is connected to terminal 5 until energized, then terminal 1 is connected to terminal 4..
Terminal 3 is connected to terminal 5 until energized, then terminal 3 is connected to terminal 4..
Terminal 4 is connected to terminal 5 until energized, then terminal 4 is connected to terminal 3.
Terminal 4 is connected to terminal 3 until energized, then terminal 4 is connected to terminal 5.

 

23. The voltage drop of a Silicon Diode that is forward biased is:

1.0 - 1.8 volts.
source voltage.
.2 - .3 volts.
.5 - .7 volts.

 

24. Technician A say the diode shown in the schematic circuit below is reverse-bias. Technician B says that, in this circuit, the light would be OFF. Who is correct?

Technician A only.
Technician B only.
Both Technicians A and B.
Neither Technicians A nor B.

 

25. Applying voltage to a PN junction is called:

doping.
biasing.
temperature.
covalent bonding.

 

26. A device that produces a voltage when put under pressure is:

a battery.
a generator.
a solar cell.
a crystal.

 

27. When the lines of a magnetic force cut across a conductor:

a voltage is induced into the conductor.
the conductor is permanently induced.
the conductor is permanently magnetized.
magnetism is induced into the conductor.

 

28. When electrical current is passed through a conductor that is forced into many loops, a magnetic field is created. The strength of the field may be increased by

increasing the turns or coils of the conductor.
increasing the amount of the current in the coils.
both A and B.
neither A nor B.

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