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TSA Electrical Engineering Practice Test

Total questions: 50

Worksheet time: 25mins

Name
Class
Date
1.

What is the total resistance of 220Ω, 330Ω, and 150Ω resistors in series?

a)

480Ω

b)

700Ω

c)

55Ω

d)

700kΩ

2.

A 10V source pushes 2A of current. What is resistance?

a)

5Ω

b)

20Ω

c)

12Ω

d)

0.2Ω

3.

A circuit has 200Ω resistance and 0.5A current. What is voltage?

a)

10V

b)

100V

c)

200V

d)

1V

4.

The unit of power is:

a)

Volt

b)

Ohm

c)

Amp

d)

Watt

5.

What does a resistor do?

a)

Stores energy

b)

Converts AC to DC

c)

Limits current

d)

Interrupts current

6.

Which symbol represents a diode on a schematic?

a)

b)

c)

d)

7.

What type of current changes direction?

a)

Direct current

b)

Alternating current

c)

Step current

d)

Parallel current

8.

A blown fuse creates:

a)

Short circuit

b)

Open circuit

c)

Voltage spike

d)

Reverse polarity

9.

What is the total resistance of two 1kΩ resistors in parallel?

a)

2000Ω

b)

500Ω

c)

1000Ω

d)

250Ω

10.

Batteries supply which current type?

a)

AC

b)

Square current

c)

DC

d)

Ripple current

11.

What stores charge in an electric field?

a)

Resistor

b)

Transistor

c)

Capacitor

d)

Inductor

12.

The basic equation for Ohm’s Law is:

a)

C = V/I

b)

V = I × R

c)

W = V/I

d)

P = V + I

13.

A device that converts mechanical motion to electrical energy is:

a)

Motor

b)

Generator

c)

Battery

d)

Fuse

14.

What happens to current when resistance increases (voltage constant)?

a)

Current decreases

b)

Current increases

c)

Voltage changes

d)

Nothing happens

15.

What is the total resistance of 100Ω, 220Ω, and 680Ω in series?

a)

1kΩ

b)

1000mΩ

c)

100Ω

d)

1MΩ

16.

A capacitor’s unit of measurement is:

a)

Ohm

b)

Watt

c)

Farad

d)

Newton

17.

A circuit with multiple paths is called:

a)

Linear

b)

Parallel

c)

Series

d)

Split

18.

The device that steps AC voltages up/down is a:

a)

Capacitor

b)

Transistor

c)

Transformer

d)

Diode

19.

12V and 4A are measured across a lamp. How much power does it use?

a)

8W

b)

48W

c)

3W

d)

16W

20.

Electricity flows due to movement of:

a)

Protons

b)

Neutrons

c)

Electrons

d)

Atoms

21.

The U.S. power grid primarily uses:

a)

AC

b)

DC

c)

Solar

d)

Mixed

22.

A component that stores energy in a magnetic field is:

a)

Capacitor

b)

Diode

c)

Resistor

d)

Inductor

23.

A resistor marked Brown-Black-Brown-Gold is:

a)

1Ω

b)

10Ω

c)

100Ω ±5%

d)

100kΩ

24.

A short circuit causes current to:

a)

Stop

b)

Reverse direction

c)

Spike dangerously higher

d)

Drop to zero

25.

Which tool measures current?

a)

Voltmeter

b)

Ammeter

c)

Compass

d)

Ohmmeter

26.

What material is a strong insulator?

a)

Copper

b)

Steel

c)

Gold

d)

Plastic

27.

Two 4Ω resistors in parallel equal:

a)

8Ω

b)

2Ω

c)

4Ω

d)

16Ω

28.

Which circuit property is the same at all points in a series circuit?

a)

Ohms

b)

Voltage

c)

Resistance

d)

Current

29.

A 120Ω resistor with 2A passing through it drops how much voltage?

a)

240V

b)

60V

c)

120V

d)

4V

30.

What happens in a series circuit if one bulb burns out?

a)

Remaining get brighter

b)

All go out

c)

Voltage doubles

d)

Current increases

31.

What converts electrical energy into motion?

a)

Solar Cell

b)

Capacitor

c)

Motor

d)

Switch

32.

Which component blocks reverse current?

a)

Resistor

b)

Speaker

c)

Switch

d)

Diode

33.

A 5Ω resistor with 10V will draw:

a)

2A

b)

0.5A

c)

15A

d)

50A

34.

A fuse is designed to protect a circuit from:

a)

Low voltage

b)

Corrosion

c)

RF waves

d)

Excess current

35.

What is the result of adding more branches to a parallel circuit?

a)

Total resistance decreases

b)

Current stops

c)

Voltage drops

d)

Power increases automatically

36.

Which has the lowest resistance?

a)

Long thin wire

b)

Short thin wire

c)

Long thick wire

d)

Short thick wire

37.

A repeating switch that resets after overload is a:

a)

Fuse

b)

Circuit breaker

c)

Thermistor

d)

Relay

38.

Which symbol represents a capacitor on a schematic?

a)

b)

c)

d)

39.

What is the current in a 12V circuit with 3Ω total resistance?

a)

2A

b)

4A

c)

36A

d)

15A

40.

A photoresistor responds to:

a)

Pressure

b)

Light

c)

Temperature

d)

Motion

41.

A battery connected directly across a wire creates:

a)

Perfect resistance

b)

Short circuit

c)

Open circuit

d)

Parallel circuit

42.

A potentiometer is used to:

a)

Increase frequency

b)

Adjust resistance

c)

Reduce voltage by half

d)

Store charge

43.

Copper is used for wiring because it is:

a)

Cheap

b)

Highly conductive

c)

Magnetic

d)

An insulator

44.

What is the unit of electrical energy over time?

a)

Watt-hour

b)

Ampere

c)

Tesla

d)

Weber

45.

What is voltage also called?

a)

Electric potential difference

b)

Resistance

c)

Current

d)

Power

46.

In a parallel circuit, each component receives:

a)

Shared current

b)

Full voltage

c)

One-half voltage

d)

Slightly more current

47.

Why must LEDs use resistors?

a)

To make them brighter

b)

To avoid excessive current

c)

To reverse voltage

d)

To prevent flicker

48.

Resistor color bands are used to:

a)

Show direction

b)

Indicate resistance value

c)

Show voltage

d)

Diagnose power

49.

What type of device stores chemical energy and releases electrical energy?

a)

Capacitor

b)

Resistor

c)

Battery

d)

Relay

50.

Which symbol represents a switch on a schematic?

a)

b)

c)

d)

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