Electricity for The Trades 3rd Edition by – Test Bank

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Electricity for The Trades 3rd Edition by – Test Bank

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Electricity for the Trades, 3e (Petruzella)

Chapter 2   Atoms and Electricity

 

1) Electrons are extremely lighter than both protons and neutrons.

 

Answer:  TRUE

Difficulty: 2 Medium

Learning Objective:  Describe the structure and electrical properties of an atom

Bloom’s:  Understand

Accessibility:  Keyboard Navigation

 

2) Normally every atom contains more electrons than protons.

 

Answer:  FALSE

Difficulty: 1 Easy

Learning Objective:  Describe the structure and electrical properties of an atom

Bloom’s:  Understand

Accessibility:  Keyboard Navigation

 

3) Neutrons do not enter into any ordinary electrical activity.

 

Answer:  TRUE

Difficulty: 1 Easy

Learning Objective:  Describe the structure and electrical properties of an atom

Bloom’s:  Understand

Accessibility:  Keyboard Navigation

 

4) The further away from the nucleus, the higher the energy level of the electrons.

 

Answer:  TRUE

Difficulty: 1 Easy

Learning Objective:  Describe the structure and electrical properties of an atom

Bloom’s:  Understand

Accessibility:  Keyboard Navigation

 

5) The particles that can be found within an atom are:

1. A) electrons and protons.
2. B) protons and neutrons.
3. C) neutrons, protons, and electrons.
4. D) electrons, molecules, and protons.

 

Answer:  C

Difficulty: 1 Easy

Learning Objective:  Describe the structure and electrical properties of an atom

Bloom’s:  Understand

Accessibility:  Keyboard Navigation

 

6) Tiny particles called ________ rotate in orbits around the nucleus of an atom.

1. A) electrons
2. B) neutrons
3. C) protons
4. D) All of the answers are correct.

 

Answer:  A

Difficulty: 1 Easy

Learning Objective:  Describe the structure and electrical properties of an atom

Bloom’s:  Understand

Accessibility:  Keyboard Navigation

 

7) The type of electrical charge assigned to a proton is:

1. A) positive.
2. B) negative.
3. C) no charge.
4. D) positive or negative.

 

Answer:  A

Difficulty: 1 Easy

Learning Objective:  Describe the structure and electrical properties of an atom

Bloom’s:  Understand

Accessibility:  Keyboard Navigation

 

8) An atom possesses a neutral electric charge because:

1. A) the number of electrons equals the number of neutrons.
2. B) the number of protons is greater than the number of electrons.
3. C) the number of electrons is greater than the number of protons.
4. D) the number of electrons is equal to the number of protons.

 

Answer:  D

Difficulty: 1 Easy

Learning Objective:  Describe the structure and electrical properties of an atom

Bloom’s:  Understand

Accessibility:  Keyboard Navigation

 

 

 

9) A normal copper atom contains 29 electrons. According to the Bohr model of the atom, the placement of these electrons, starting with the first shell and moving outward, would be:

1. A) 2-8-18-1, respectively.
2. B) 1-2-8-18, respectively.
3. C) 1-2-4-5-6, respectively.
4. D) 6-5-4-2-1, respectively.

 

Answer:  A

Difficulty: 2 Medium

Learning Objective:  Describe the structure and electrical properties of an atom

Bloom’s:  Understand

Accessibility:  Keyboard Navigation

 

10) An ion is an atom that has:

1. A) lost electrons.
2. B) gained electrons.
3. C) lost electrons or gained electrons.
4. D) lost electrons and gained electrons.

 

Answer:  C

Difficulty: 1 Easy

Learning Objective:  Explain how the ionization process produces positive and negative charges.

Bloom’s:  Understand

Accessibility:  Keyboard Navigation

 

11) A negative ion has:

1. A) more electrons than protons.
2. B) fewer electrons than protons.
3. C) a complete outer electron shell.
4. D) an incomplete outer electron shell.

 

Answer:  A

Difficulty: 1 Easy

Learning Objective:  Explain how the ionization process produces positive and negative charges.

Bloom’s:  Understand

Accessibility:  Keyboard Navigation

 

 

 

12) A positive ion has:

1. A) more electrons than protons.
2. B) fewer electrons than protons.
3. C) a complete outer electron shell.
4. D) an incomplete outer electron shell.

 

Answer:  B

Difficulty: 1 Easy

Learning Objective:  Explain how the ionization process produces positive and negative charges.

Bloom’s:  Understand

Accessibility:  Keyboard Navigation

 

13) The process by which atoms either gain or lose electrons is called

1. A) conduction.
2. B) insulation.
3. C) ionization.
4. D) transformation.

 

Answer:  C

Difficulty: 1 Easy

Learning Objective:  Explain how the ionization process produces positive and negative charges.

Bloom’s:  Understand

Accessibility:  Keyboard Navigation

 

14) The particles that can be found within the nucleus of an atom are:

1. A) electrons and protons.
2. B) protons and neutrons.
3. C) neutrons, protons, and electrons.
4. D) electrons, molecules, and protons.

 

Answer:B

Difficulty: 2 Medium

Learning Objective:  Describe the structure and electrical properties of an atom

Bloom’s:  Understand

Accessibility:  Keyboard Navigation

 

15) Whenever an electron is removed from its orbit it is known as a free electron.

 

Answer:  TRUE

Difficulty: 1 Easy

Learning Objective:  Define electricity in terms of electron flow.

Bloom’s:  Remember

Accessibility:  Keyboard Navigation

 

 

 

16) Electricity is commonly defined as the flow of free electrons through an insulator.

 

Answer:  FALSE

Difficulty: 1 Easy

Learning Objective:  Compare the electrical properties of conductors, insulators, and semiconductors.

Bloom’s:  Understand

Accessibility:  Keyboard Navigation

 

17) Most metals are poor conductors.

 

Answer:  FALSE

Difficulty: 1 Easy

Learning Objective:  Compare the electrical properties of conductors, insulators, and semiconductors.

Bloom’s:  Understand

Accessibility:  Keyboard Navigation

 

18) Plastic is a common semiconductor material.

 

Answer:  FALSE

Difficulty: 2 Medium

Learning Objective:  Compare the electrical properties of conductors, insulators, and semiconductors.

Bloom’s:  Understand

Accessibility:  Keyboard Navigation

 

19) Copper is the metal most commonly used as an electric conductor.

 

Answer:  TRUE

Difficulty: 1 Easy

Learning Objective:  Compare the electrical properties of conductors, insulators, and semiconductors.

Bloom’s:  Understand

Accessibility:  Keyboard Navigation

 

20) Under no circumstances will an insulator permit the flow of electrons through it.

 

Answer:  FALSE

Difficulty: 2 Medium

Learning Objective:  Compare the electrical properties of conductors, insulators, and semiconductors.

Bloom’s:  Understand

Accessibility:  Keyboard Navigation

 

 

 

21) The two basic types of semiconductors are the n-type and the p-type.

 

Answer:  TRUE

Difficulty: 1 Easy

Learning Objective:  Compare the electrical properties of conductors, insulators, and semiconductors.

Bloom’s:  Understand

Accessibility:  Keyboard Navigation

 

22) A semiconductor diode passes current in one direction only.

 

Answer:  TRUE

Difficulty: 1 Easy

Learning Objective:  Compare the electrical properties of conductors, insulators, and semiconductors.

Bloom’s:  Understand

Accessibility:  Keyboard Navigation

 

23) Under no circumstances should a continuity checker be connected to a live circuit.

 

Answer:  TRUE

Difficulty: 1 Easy

Learning Objective:  Explain the use of a continuity tester.

Bloom’s:  Understand

Accessibility:  Keyboard Navigation

 

24) Current cannot exist without voltage.

 

Answer:  TRUE

Difficulty: 1 Easy

Learning Objective:  Define electricity in terms of electron flow.

Bloom’s:  Remember

Accessibility:  Keyboard Navigation

 

25) The outer-shell electrons of an atom:

1. A) are called valence electrons.
2. B) are set free most easily.
3. C) become free electrons once they are set free.
4. D) All of the answers are correct.

 

Answer:  D

Difficulty: 2 Medium

Learning Objective:  Define electricity in terms of electron flow.

Bloom’s:  Remember

Accessibility:  Keyboard Navigation

 

 

 

26) Electricity is commonly defined as:

1. A) the flow of free protons along a conductor.
2. B) the exchange of free nuclei from one atom to another through a conductor.
3. C) electromagnetic induction.
4. D) the flow of free electrons from one atom to another through a conductor.

 

Answer:  D

Difficulty: 1 Easy

Learning Objective:  Define electricity in terms of electron flow.

Bloom’s:  Remember

Accessibility:  Keyboard Navigation

 

27) A good conductor of electricity is:

1. A) wood.
2. B) plastic.
3. C) glass.
4. D) silver.

 

Answer:  D

Difficulty: 2 Medium

Learning Objective:  Compare the electrical properties of conductors, insulators, and semiconductors.

Bloom’s:  Understand

Accessibility:  Keyboard Navigation

 

28) A good insulator of electricity is:

1. A) copper.
2. B) steel.
3. C) plastic.
4. D) silver.

 

Answer:  C

Difficulty: 2 Medium

Learning Objective:  Compare the electrical properties of conductors, insulators, and semiconductors.

Bloom’s:  Understand

Accessibility:  Keyboard Navigation

 

 

 

29) A good insulator of electricity is a substance that:

1. A) is used to conduct an electric current.
2. B) is a metal.
3. C) has 1, 2, or 3 valence electrons.
4. D) is used to prevent the flow of electrons.

 

Answer:  D

Difficulty: 1 Easy

Learning Objective:  Compare the electrical properties of conductors, insulators, and semiconductors.

Bloom’s:  Understand

Accessibility:  Keyboard Navigation

 

30) Which of the following can be classified as a semiconductor?

1. A) diode
2. B) transistor
3. C) integrated circuit chip
4. D) All of the answers are correct.

 

Answer:  D

Difficulty: 2 Medium

Learning Objective:  Compare the electrical properties of conductors, insulators, and semiconductors.

Bloom’s:  Understand

Accessibility:  Keyboard Navigation

 

31) A simple continuity tester circuit is made up of:

1. A) a series circuit consisting of a battery, switch, and test leads.
2. B) a parallel circuit consisting of a battery, light bulb, and test leads.
3. C) a parallel circuit consisting of a battery, switch, and test leads.
4. D) a series circuit consisting of a battery, light bulb, and test leads.

 

Answer:  D

Difficulty: 2 Medium

Learning Objective:  Explain the use of a continuity tester.

Bloom’s:  Understand

Accessibility:  Keyboard Navigation

 

 

 

32) A continuity tester is used to check a fuse. When the fuse is connected across the test leads, a blown fuse is indicated when:

1. A) the lamp comes on with full brightness.
2. B) the lamp comes on with approximately half the normal brightness.
3. C) the lamp does not come on at all.
4. D) either the lamp comes on with full brightness or with approximately half the normal brightness.

 

Answer:  C

Difficulty: 2 Medium

Learning Objective:  Explain the use of a continuity tester.

Bloom’s:  Understand

Accessibility:  Keyboard Navigation

 

33) The field of electronics is based on the ability of semiconductors to ________ an electric signal.

1. A) generate
2. B) amplify
3. C) control
4. D) All of the answers are correct.

 

Answer:  D

Difficulty: 1 Easy

Learning Objective:  Compare the electrical properties of conductors, insulators, and semiconductors.

Bloom’s:  Understand

Accessibility:  Keyboard Navigation

 

34) Voltage is a form of electrical ________ that causes free electrons to move from one atom to another.

1. A) current
2. B) resistance
3. C) capacitance
4. D) pressure

 

Answer:  D

Difficulty: 1 Easy

Learning Objective:  Define electricity in terms of electron flow.

Bloom’s:  Remember

Accessibility:  Keyboard Navigation

 

 

 

35) Electrical current is measure in

1. A) Ohms.
2. B) Amperes.
3. C) Watts.
4. D) Volts.

 

Answer:  B

Difficulty: 1 Easy

Learning Objective:  Define electricity in terms of electron flow.

Bloom’s:  Remember

Accessibility:  Keyboard Navigation

 

36) Resistance is a measure of the ________ to the electron flow through a material

1. A) direction
2. B) reversal
3. C) assistance
4. D) opposition

 

Answer:  D

Difficulty: 1 Easy

Learning Objective:  Define electricity in terms of electron flow.

Bloom’s:  Remember

Accessibility:  Keyboard Navigation

 

Electricity for the Trades, 3e (Petruzella)

Chapter 4   Electrical Quantities and Ohm’s Law

 

1) The coulomb is the practical unit for an electric charge.

 

Answer:  TRUE

Difficulty: 1 Easy

Learning Objective:  List the unit of measurement for electric current, voltage, resistance, power, and energy.

Bloom’s:  Remember

Accessibility:  Keyboard Navigation

 

2) An ohmmeter is the instrument used to measure current flow.

 

Answer:  FALSE

Difficulty: 1 Easy

Learning Objective:  Know which instrument to use to measure each electrical property and how to connect it properly.

Bloom’s:  Remember

Accessibility:  Keyboard Navigation

 

3)  The unit for very small amounts of current is the megampere.

 

Answer:  FALSE

Difficulty: 1 Easy

Learning Objective:  List the unit of measurement for electric current, voltage, resistance, power, and energy.

Bloom’s:  Remember

Accessibility:  Keyboard Navigation

 

4) Voltage exists between two points and does not flow through a circuit as current does.

 

Answer:  TRUE

Difficulty: 2 Medium

Learning Objective:  Know the definition of electric current, voltage, resistance, power, and energy.

Bloom’s:  Remember

Accessibility:  Keyboard Navigation

 

5) High-voltage values are expressed in kilovolts and megavolts.

 

Answer:  TRUE

Difficulty: 1 Easy

Learning Objective:  List the unit of measurement for electric current, voltage, resistance, power, and energy.

Bloom’s:  Remember

Accessibility:  Keyboard Navigation

 

6) Resistance is electrical pressure that causes electron flow in a circuit.

 

Answer:  FALSE

Difficulty: 1 Easy

Learning Objective:  Know the definition of electric current, voltage, resistance, power, and energy.

Bloom’s:  Remember

Accessibility:  Keyboard Navigation

 

7) The resistance of a conductor causes heat in the conductor when a current flows through it.

 

Answer:  TRUE

Difficulty: 1 Easy

Learning Objective:  Know the definition of electric current, voltage, resistance, power, and energy.

Bloom’s:  Remember

Accessibility:  Keyboard Navigation

 

8) High-resistance values are expressed in mΩ and µΩ.

 

Answer:  FALSE

Difficulty: 2 Medium

Learning Objective:  List the unit of measurement for electric current, voltage, resistance, power, and energy.

Bloom’s:  Remember

Accessibility:  Keyboard Navigation

 

9) One ampere is equivalent to:

1. A) one coulomb per second.
2. B) one ohm per second.
3. C) one joule per minute.
4. D) one joule per second.

 

Answer:  A

Difficulty: 1 Easy

Learning Objective:  Know the definition of electric current, voltage, resistance, power, and energy.

Bloom’s:  Remember

Accessibility:  Keyboard Navigation

 

 

 

10) 1,000,000 microamperes are equivalent to

1. A) 1 A.
2. B) 10 A.
3. C) 100 A.
4. D) 1,000 A.

 

Answer:  A

Difficulty: 3 Hard

Learning Objective:  List the unit of measurement for electric current, voltage, resistance, power, and energy.

Bloom’s:  Remember

Accessibility:  Keyboard Navigation

 

11) The ammeter is connected ________ to measure current flow.

1. A) across the supply voltage
2. B) in parallel
3. C) in series
4. D) between the circuit and ground

 

Answer:  C

Difficulty: 2 Medium

Learning Objective:  Know which instrument to use to measure each electrical property and how to connect it properly.

Bloom’s:  Remember

Accessibility:  Keyboard Navigation

 

12) The symbol used to represent current is:

1. A) P.
2. B) V.
3. C) R.
4. D) I.

 

Answer:  D

Difficulty: 1 Easy

Learning Objective:  List the unit of measurement for electric current, voltage, resistance, power, and energy.

Bloom’s:  Remember

Accessibility:  Keyboard Navigation

 

 

 

13) The force that causes the flow of electrons through a conductor is the:

1. A) power.
2. B) current.
3. C) voltage.
4. D) resistance.

 

Answer:  C

Difficulty: 1 Easy

Learning Objective:  Know the definition of electric current, voltage, resistance, power, and energy.

Bloom’s:  Remember

Accessibility:  Keyboard Navigation

 

14) The voltmeter is connected ________ to measure voltage.

1. A) across
2. B) parallel
3. C) series
4. D) either across or parallel

 

Answer:  D

Difficulty: 2 Medium

Learning Objective:  Know which instrument to use to measure each electrical property and how to connect it properly.

Bloom’s:  Remember

Accessibility:  Keyboard Navigation

 

15) An electrical transmission line voltage of 230 kilovolts is equivalent to

1. A) 230 volts.
2. B) 2,300 volts.
3. C) 230,000 volts.
4. D) 230,000,000 volts.

 

Answer:  C

Difficulty: 3 Hard

Learning Objective:  List the unit of measurement for electric current, voltage, resistance, power, and energy.

Bloom’s:  Remember

Accessibility:  Keyboard Navigation

 

 

 

16) The ohmmeter is an instrument used to measure:

1. A) resistance.
2. B) voltage.
3. C) current.
4. D) energy.

 

Answer:  A

Difficulty: 1 Easy

Learning Objective:  Know which instrument to use to measure each electrical property and how to connect it properly.

Bloom’s:  Remember

Accessibility:  Keyboard Navigation

 

17) Resistance is the opposition to:

1. A) power.
2. B) voltage.
3. C) current flow.
4. D) polarity.

 

Answer:  C

Difficulty: 1 Easy

Learning Objective:  Know the definition of electric current, voltage, resistance, power, and energy.

Bloom’s:  Remember

Accessibility:  Keyboard Navigation

 

18) The ohmmeter should never be connected to a(n) ________ circuit.

1. A) series
2. B) parallel
3. C) live
4. D) open

 

Answer:  C

Difficulty: 2 Medium

Learning Objective:  Know which instrument to use to measure each electrical property and how to connect it properly.

Bloom’s:  Remember

Accessibility:  Keyboard Navigation

 

 

 

19) A resistance value of 1.5 kΩ is equivalent to:

1. A) 0.15 ohms.
2. B) 1.5 ohms.
3. C) 15 ohms.
4. D) 1,500 ohms.

 

Answer:  D

Difficulty: 3 Hard

Learning Objective:  List the unit of measurement for electric current, voltage, resistance, power, and energy.

Bloom’s:  Remember

Accessibility:  Keyboard Navigation

 

20) What is the correct unit for electric charge?

1. A) current
2. B) voltage
3. C) ohm
4. D) coulomb

 

Answer:  D

Difficulty: 1 Easy

Learning Objective:  List the unit of measurement for electric current, voltage, resistance, power, and energy.

Bloom’s:  Remember

Accessibility:  Keyboard Navigation

 

21) Power is equal to voltage multiplied by resistance.

 

Answer:  FALSE

Difficulty: 2 Medium

Learning Objective:  Explain the relationships between electric current, voltage, resistance, power, and energy.

Bloom’s:  Understand

Accessibility:  Keyboard Navigation

 

22) The faster a lamp converts electric energy to light, the brighter the lamp and the lower the wattage rating.

 

Answer:  FALSE

Difficulty: 2 Medium

Learning Objective:  Explain the relationships between electric current, voltage, resistance, power, and energy.

Bloom’s:  Understand

Accessibility:  Keyboard Navigation

 

 

 

23) Energy measurements are used in calculating the cost of electric energy.

 

Answer:  TRUE

Difficulty: 1 Easy

Learning Objective:  Explain the relationships between electric current, voltage, resistance, power, and energy.

Bloom’s:  Understand

Accessibility:  Keyboard Navigation

 

24) A closed circuit consists of a complete current path from one side of the voltage source to the other.

 

Answer:  TRUE

Difficulty: 2 Medium

Learning Objective:  Identify the essential parts of a circuit and state the purpose of each.

Bloom’s:  Remember

Accessibility:  Keyboard Navigation

 

25) According to Ohm’s law, the current flow in a circuit is directly proportional to the voltage and inversely proportional to the resistance.

 

Answer:  TRUE

Difficulty: 1 Easy

Learning Objective:  Explain the relationships between electric current, voltage, resistance, power, and energy.

Bloom’s:  Understand

Accessibility:  Keyboard Navigation

 

26) If the resistance of a circuit is higher than normal and the voltage is normal, the current will be lower than normal.

 

Answer:  TRUE

Difficulty: 2 Medium

Learning Objective:  Explain the relationships between electric current, voltage, resistance, power, and energy.

Bloom’s:  Understand

Accessibility:  Keyboard Navigation

 

27)  If the source voltage of a circuit is lower than normal, the current will be lower than normal.

 

Answer:  TRUE

Difficulty: 2 Medium

Learning Objective:  Explain the relationships between electric current, voltage, resistance, power, and energy.

Bloom’s:  Understand

Accessibility:  Keyboard Navigation

 

28) Conventional current flow is opposite in direction to electron flow.

 

Answer:  TRUE

Difficulty: 1 Easy

Learning Objective:  Describe the difference between electron flow and conventional current flow.

Bloom’s:  Understand

Accessibility:  Keyboard Navigation

 

29) Electron flow is based on the electron theory of matter and, therefore, indicates the flow of current from negative to positive.

 

Answer:  TRUE

Difficulty: 2 Medium

Learning Objective:  Describe the difference between electron flow and conventional current flow.

Bloom’s:  Understand

Accessibility:  Keyboard Navigation

 

30) An electric toaster is rated for 120 V and 10 A. Its power rating would be:

1. A) 1200 W.
2. B) 1200 Wh.
3. C) 1200 kWh.
4. D) 1200 J.

 

Answer:  A

Difficulty: 3 Hard

Learning Objective:  Calculate different electrical values using the power equation and Ohm’s law.

Bloom’s:  Apply

Accessibility:  Keyboard Navigation

 

 

 

31) The meter connection shown is that of a (n)

 

 

1. A) ohmmeter.
2. B) wattmeter.
3. C) ammeter.
4. D) voltmeter.

 

Answer:  B

Difficulty: 2 Medium

Learning Objective:  Identify the electrical device used to measure the different electrical properties.

Bloom’s:  Remember

Accessibility:  Keyboard Navigation

 

32) Electric energy can be measured in:

1. A) watt-hours.
2. B) kilowatt-hours.
3. C)  joules.
4. D) All of the answers are correct.

 

Answer:  D

Difficulty: 2 Medium

Learning Objective:  Explain the relationships between electric current, voltage, resistance, power, and energy.

Bloom’s:  Remember

Accessibility:  Keyboard Navigation

 

 

 

33) An electric dryer rated for 3000 W is operated for 5 hours. The amount of energy used or converted is:

1. A) 15,000 Wh.
2. B) 5 kWh.
3. C) 15,000,000 kWh.
4. D) 5 Wh.

 

Answer:  A

Difficulty: 3 Hard

Learning Objective:  Calculate different electrical values using the energy equation.

Bloom’s:  Apply

Accessibility:  Keyboard Navigation

 

34) Electric energy used in homes is measured using:

1. A) a voltmeter.
2. B) an ohmmeter.
3. C) an ammeter.
4. D) a kilowatt-hour meter.

 

Answer:  D

Difficulty: 2 Medium

Learning Objective:  Identify the electrical device used to measure the different electrical properties.

Bloom’s:  Remember

Accessibility:  Keyboard Navigation

 

35) Which of the following is an example of a voltage source?

1. A) a battery
2. B) a light bulb
3. C) a switch
4. D) copper wire conductors

 

Answer:  A

Difficulty: 1 Easy

Learning Objective:  Identify the essential parts of a circuit and state the purpose of each.

Bloom’s:  Remember

Accessibility:  Keyboard Navigation

 

 

 

36) In a basic electrical circuit, the part that converts the electrical energy into other forms is:

1. A) the load.
2. B) the source.
3. C) the conductor(s).
4. D) the switch.

 

Answer:  A

Difficulty: 2 Medium

Learning Objective:  Identify the essential parts of a circuit and state the purpose of each.

Bloom’s:  Remember

Accessibility:  Keyboard Navigation

 

37) Electrical conductors:

1. A) have high resistance.
2. B) use most of the energy available from the source.
3. C) complete the electron path from the source to the load.
4. D) All of the answers are correct.

 

Answer:  C

Difficulty: 1 Easy

Learning Objective:  Identify the essential parts of a circuit and state the purpose of each.

Bloom’s:  Remember

Accessibility:  Keyboard Navigation

 

38) Which of the following is an example of a load?

1. A) an electrical wall outlet
2. B) a hair dryer
3. C) a pushbutton
4. D) an extension cord

 

Answer:  B

Difficulty: 1 Easy

Learning Objective:  Identify the essential parts of a circuit and state the purpose of each.

Bloom’s:  Remember

Accessibility:  Keyboard Navigation

 

39) Which of the following is classified as a protective device?

1. A) a pushbutton
2. B) a fuse
3. C) a circuit breaker
4. D) both a fuse and a circuit breaker

 

Answer:  D

Difficulty: 2 Medium

Learning Objective:  Identify the essential parts of a circuit and state the purpose of each.

Bloom’s:  Remember

Accessibility:  Keyboard Navigation

 

40) A switch would be classified as:

1. A) a control device.
2. B) a protective device.
3. C) a load device.
4. D) a voltage source.

 

Answer:  A

Difficulty: 2 Medium

Learning Objective:  Identify the essential parts of a circuit and state the purpose of each.

Bloom’s:  Remember

Accessibility:  Keyboard Navigation

 

41) Other factors remaining constant, what would the effect on current flow be in a circuit if the applied voltage was doubled?

1. A) it would double
2. B) it would remain the same
3. C) it would be divided by two
4. D) it would be divided by four

 

Answer:  A

Difficulty: 2 Medium

Learning Objective:  Explain the relationships between electric current, voltage, resistance, power, and energy.

Bloom’s:  Understand

Accessibility:  Keyboard Navigation

 

42) If 10 V is applied, in turn, to a 50-Ω resistor and then a 100-Ω resistor, the current flow will be:

1. A) the same through both resistors.
2. B) directly proportional to the resistance.
3. C) greater through the 100-Ω resistor.
4. D) greater through the 50-Ω resistor.

 

Answer:  D

Difficulty: 3 Hard

Learning Objective:  Explain the relationships between electric current, voltage, resistance, power, and energy.

Bloom’s:  Understand

Accessibility:  Keyboard Navigation

 

 

 

43) According to Ohm’s law current is equal to:

1. A) voltage plus resistance.
2. B) voltage minus resistance.
3. C) voltage divided by resistance.
4. D) voltage multiplied by resistance.

 

Answer:  C

Difficulty: 1 Easy

Learning Objective:  Explain the relationships between electric current, voltage, resistance, power, and energy.

Bloom’s:  Understand

Accessibility:  Keyboard Navigation

 

44) An electric heater with a resistance of 12 Ω is plugged into a 120 V electrical outlet. The amount of current flow to the heater would be

1. A) 60 Amps.
2. B) 30 Amps.
3. C) 15 Amps.
4. D) 10 Amps.

 

Answer:  D

Difficulty: 3 Hard

Learning Objective:  Calculate different electrical values using the power equation and Ohm’s law.

Bloom’s:  Apply

Accessibility:  Keyboard Navigation

 

45) The current flowing through a 10 Ω resistor load is measured and found to be 5 amps. The voltage across the load would be

1. A) 2 volts.
2. B) 50 volts.
3. C) 60 volts.
4. D) 120 volts.

 

Answer:  B

Difficulty: 3 Hard

Learning Objective:  Calculate different electrical values using the power equation and Ohm’s law.

Bloom’s:  Apply

Accessibility:  Keyboard Navigation

 

 

 

46) What is the resistance of an electric iron with a nameplate rating of 120 volts and 10 amps?

1. A) 10 Ω
2. B) 12 Ω
3. C) 30 Ω
4. D) 60 Ω

 

Answer:  B

Difficulty: 3 Hard

Learning Objective:  Calculate different electrical values using the power equation and Ohm’s law.

Bloom’s:  Apply

Accessibility:  Keyboard Navigation