Complete Test Bank With Answers
Sample Questions Posted Below
Electricity for the Trades, 3e (Petruzella)
Chapter 5 Simple, Series, and Parallel Circuits
1) Use of symbols tends to make circuit diagrams more complicated.
2) Electrical symbols always look like the part they represent.
3) All batteries supply DC power.
4) The output voltage connections of an AC power supply are identified as being positive or negative.
5) The function of a circuit breaker is similar to that of a fuse.
6) For a normally closed pushbutton, the contacts are closed (ON position) whenever the button is not pressed.
7) All electrical load devices convert the energy of the source to another form of energy.
8) Resistors are used to limit and control the flow of current in a circuit.
9) Power distribution systems are often shown using single-line diagrams.
10) Unlike schematic diagrams, wiring diagrams show the actual connection and placement of all components.
11) The symbol shown is used to represent a(n)
- A) AC power source.
- B) DC power source.
- C) open power source.
- D) closed power source.
12) The symbol shown is used to represent a(n)
- A) AC power source.
- B) DC power source.
- C) open power source.
- D) closed power source.
13) The symbol shown is used to represent
- A) wires crossed.
- B) a lamp holder.
- C) a circuit breaker.
- D) a fuse.
14) Which symbol would be used to represent the device shown?
A)
B)
C)
D)
15) Which symbol would be used to represent the device shown?
A)
B)
C)
D)
16) A fuse is used to:
- A) protect circuit wiring and equipment.
- B) allow only currents within safe limits to flow.
- C) automatically open the circuit when a higher current flows.
- D) All of the answers are correct.
17) Which of the following electrical diagrams is easiest to read?
- A) pictorial
- B) wiring
- C) perspective
- D) schematic
18) Which of the following electrical diagrams is impractical for complex circuits?
- A) pictorial
- B) wiring
- C) perspective
- D) schematic
19) The electrical diagram shown would be classified as a ________ type.
- A) schematic
- B) block
- C) single line
- D) pictorial
20) When loads are connected end to end they are said to be connected in series.
21) For series connected loads, the same amount of current flows through each of the loads.
22) For series connected loads, there are as many current paths as there are loads.
23) For series connected loads, the higher the resistance of the load the less voltage it receives.
24) In a series circuit, the current flow stops if the circuit is broken at any point.
25) The truth table is for two switches connected in series used to control a lamp.
26) The circuit shows two switches connected in parallel.
27) When load devices are operated in parallel, each load operates independently of the others.
28) When load devices are operated in parallel, the voltage across each load is the same as that of the voltage source.
29) Connecting control devices in parallel results in an OR type of control circuit.
30) The circuit shown would be classified as a ________circuit.
- A) simple
- B) series
- C) parallel
- D) series/parallel
31) For the circuit shown, the voltage across each light would be:
- A) 12 V.
- B) 6 V.
- C) 4 V.
- D) 2 V.
32) A string of lamps is connected in series to a voltage source. This connection would result in:
- A) two voltage paths.
- B) one voltage path.
- C) one current path.
- D) two current paths.
33) An AND-type control circuit consists of switches connected in:
- A) parallel.
- B) parallel and series combination.
- C) series.
- D) series and parallel combination.
34) Three lamps are connected in parallel to a 6-V source. The voltage across each lamp would be:
- A) 12 V.
- B) 6 V.
- C) 4 V.
- D) 2 V.
35) A string of lamps is connected in parallel to a voltage source. If one lamp burns out, all the other lamps:
- A) will go out.
- B) will get brighter.
- C) will not be affected.
- D) will get dimmer.
36) If a circuit is constructed to allow the electrons to follow in only one possible path, the circuit is called:
- A) a series-parallel circuit.
- B) an open circuit.
- C) a series circuit.
- D) a parallel circuit.
37) For the circuit shown, the voltage applied to each device would be
- A) 120 V.
- B) 90 V.
- C) 60 V.
- D) 30 V.
38) Breadboarding refers to:
- A) building a temporary version of a circuit.
- B) building a permanent version of a circuit.
- C) troubleshooting a circuit.
- D) repairing a circuit.
39) When current stops flowing because of a break in a circuit, the condition is usually called
- A) an open circuit.
- B) a short circuit.
- C) a grounded circuit.
- D) an intermittent circuit.
40) Which is the best description of a short circuit?
- A) The control device in the circuit is bypassed and a much higher than normal voltage is applied.
- B) The load in the circuit is bypassed, and a much larger than normal current flows.
- C) The protective device in the circuit is open and a much smaller than normal current flows.
- D) The power source in the circuit is interrupted and no current flows.
Electricity for the Trades, 3e (Petruzella)
Chapter 5 Simple, Series, and Parallel Circuits
1) Use of symbols tends to make circuit diagrams more complicated.
Answer: FALSE
Difficulty: 1 Easy
Learning Objective: Explain why symbols are used to represent electrical components.
Bloom’s: Understand
Accessibility: Keyboard Navigation
2) Electrical symbols always look like the part they represent.
Answer: FALSE
Difficulty: 1 Easy
Learning Objective: Explain why symbols are used to represent electrical components.
Bloom’s: Understand
Accessibility: Keyboard Navigation
3) All batteries supply DC power.
Answer: TRUE
Difficulty: 1 Easy
Learning Objective: Explain the operation of basic electrical devices.
Bloom’s: Understand
Accessibility: Keyboard Navigation
4) The output voltage connections of an AC power supply are identified as being positive or negative.
Answer: FALSE
Difficulty: 1 Easy
Learning Objective: Explain the symbols used to represent electrical components.
Bloom’s: Understand
Accessibility: Keyboard Navigation
5) The function of a circuit breaker is similar to that of a fuse.
Answer: TRUE
Difficulty: 1 Easy
Learning Objective: Explain the symbols used to represent electrical components.
Bloom’s: Understand
Accessibility: Keyboard Navigation
6) For a normally closed pushbutton, the contacts are closed (ON position) whenever the button is not pressed.
Answer: TRUE
Difficulty: 2 Medium
Learning Objective: Explain the symbols used to represent electrical components.
Bloom’s: Understand
Accessibility: Keyboard Navigation
7) All electrical load devices convert the energy of the source to another form of energy.
Answer: TRUE
Difficulty: 1 Easy
Learning Objective: Explain the operation of basic electrical devices.
Bloom’s: Understand
Accessibility: Keyboard Navigation
8) Resistors are used to limit and control the flow of current in a circuit.
Answer: TRUE
Difficulty: 1 Easy
Learning Objective: Explain the operation of basic electrical devices.
Bloom’s: Understand
Accessibility: Keyboard Navigation
9) Power distribution systems are often shown using single-line diagrams.
Answer: TRUE
Difficulty: 2 Medium
Learning Objective: Describe pictorial, schematic, wiring, block, and single-line diagrams.
Bloom’s: Understand
Accessibility: Keyboard Navigation
10) Unlike schematic diagrams, wiring diagrams show the actual connection and placement of all components.
Answer: TRUE
Difficulty: 1 Easy
Learning Objective: Describe pictorial, schematic, wiring, block, and single-line diagrams.
Bloom’s: Understand
Accessibility: Keyboard Navigation
11) The symbol shown is used to represent a(n)
- A) AC power source.
- B) DC power source.
- C) open power source.
- D) closed power source.
Answer: B
Difficulty: 1 Easy
Learning Objective: Identify the symbol used to represent an electrical device.
Bloom’s: Remember
Accessibility: Keyboard Navigation
12) The symbol shown is used to represent a(n)
- A) AC power source.
- B) DC power source.
- C) open power source.
- D) closed power source.
Answer: A
Difficulty: 1 Easy
Learning Objective: Identify the symbol used to represent an electrical device.
Bloom’s: Remember
Accessibility: Keyboard Navigation
13) The symbol shown is used to represent
- A) wires crossed.
- B) a lamp holder.
- C) a circuit breaker.
- D) a fuse.
Answer: C
Difficulty: 1 Easy
Learning Objective: Identify the symbol used to represent an electrical device.
Bloom’s: Remember
Accessibility: Keyboard Navigation
14) Which symbol would be used to represent the device shown?
A)
B)
C)
D)
Answer: A
Difficulty: 1 Easy
Learning Objective: Identify the symbol used to represent an electrical device.
Bloom’s: Remember
Accessibility: Keyboard Navigation
15) Which symbol would be used to represent the device shown?
A)
B)
C)
D)
Answer: C
Difficulty: 1 Easy
Learning Objective: Identify the symbol used to represent an electrical device.
Bloom’s: Remember
Accessibility: Keyboard Navigation
16) A fuse is used to:
- A) protect circuit wiring and equipment.
- B) allow only currents within safe limits to flow.
- C) automatically open the circuit when a higher current flows.
- D) All of the answers are correct.
Answer: D
Difficulty: 2 Medium
Learning Objective: Explain the operation of basic electrical devices.
Bloom’s: Understand
Accessibility: Keyboard Navigation
17) Which of the following electrical diagrams is easiest to read?
- A) pictorial
- B) wiring
- C) perspective
- D) schematic
Answer: D
Difficulty: 2 Medium
Learning Objective: Describe pictorial, schematic, wiring, block, and single-line diagrams.
Bloom’s: Understand
Accessibility: Keyboard Navigation
18) Which of the following electrical diagrams is impractical for complex circuits?
- A) pictorial
- B) wiring
- C) perspective
- D) schematic
Answer: A
Difficulty: 1 Easy
Learning Objective: Describe pictorial, schematic, wiring, block, and single-line diagrams.
Bloom’s: Understand
Accessibility: Keyboard Navigation
19) The electrical diagram shown would be classified as a ________ type.
- A) schematic
- B) block
- C) single line
- D) pictorial
Answer: D
Difficulty: 1 Easy
Learning Objective: Describe pictorial, schematic, wiring, block, and single-line diagrams.
Bloom’s: Understand
Accessibility: Keyboard Navigation
20) When loads are connected end to end they are said to be connected in series.
Answer: TRUE
Difficulty: 1 Easy
Learning Objective: Explain the operation of series-connected loads and control devices.
Bloom’s: Understand
Accessibility: Keyboard Navigation
21) For series connected loads, the same amount of current flows through each of the loads.
Answer: TRUE
Difficulty: 1 Easy
Learning Objective: Explain the operation of series-connected loads and control devices.
Bloom’s: Understand
Accessibility: Keyboard Navigation
22) For series connected loads, there are as many current paths as there are loads.
Answer: FALSE
Difficulty: 1 Easy
Learning Objective: Explain the operation of series-connected loads and control devices.
Bloom’s: Understand
Accessibility: Keyboard Navigation
23) For series connected loads, the higher the resistance of the load the less voltage it receives.
Answer: FALSE
Difficulty: 1 Easy
Learning Objective: Explain the operation of series-connected loads and control devices.
Bloom’s: Understand
Accessibility: Keyboard Navigation
24) In a series circuit, the current flow stops if the circuit is broken at any point.
Answer: TRUE
Difficulty: 1 Easy
Learning Objective: Explain the operation of series-connected loads and control devices.
Bloom’s: Understand
Accessibility: Keyboard Navigation
25) The truth table is for two switches connected in series used to control a lamp.
Answer: FALSE
Difficulty: 2 Medium
Learning Objective: Explain the operation of series-connected loads and control devices.
Bloom’s: Understand
Accessibility: Keyboard Navigation
26) The circuit shows two switches connected in parallel.
Answer: FALSE
Difficulty: 2 Medium
Learning Objective: Explain the operation of parallel-connected loads and control devices.
Bloom’s: Understand
Accessibility: Keyboard Navigation
27) When load devices are operated in parallel, each load operates independently of the others.
Answer: TRUE
Difficulty: 2 Medium
Learning Objective: Explain the operation of parallel-connected loads and control devices.
Bloom’s: Understand
Accessibility: Keyboard Navigation
28) When load devices are operated in parallel, the voltage across each load is the same as that of the voltage source.
Answer: TRUE
Difficulty: 2 Medium
Learning Objective: Explain the operation of parallel-connected loads and control devices.
Bloom’s: Understand
Accessibility: Keyboard Navigation
29) Connecting control devices in parallel results in an OR type of control circuit.
Answer: TRUE
Difficulty: 1 Easy
Learning Objective: Explain the operation of parallel-connected loads and control devices.
Bloom’s: Understand
Accessibility: Keyboard Navigation
30) The circuit shown would be classified as a ________circuit.
- A) simple
- B) series
- C) parallel
- D) series/parallel
Answer: A
Difficulty: 1 Easy
Learning Objective: Identify a simple electrical circuit.
Bloom’s: Remember
Accessibility: Keyboard Navigation
31) For the circuit shown, the voltage across each light would be:
- A) 12 V.
- B) 6 V.
- C) 4 V.
- D) 2 V.
Answer: B
Difficulty: 2 Medium
Learning Objective: Explain the operation of series-connected loads and control devices.
Bloom’s: Understand
Accessibility: Keyboard Navigation
32) A string of lamps is connected in series to a voltage source. This connection would result in:
- A) two voltage paths.
- B) one voltage path.
- C) one current path.
- D) two current paths.
Answer: C
Difficulty: 2 Medium
Learning Objective: Explain the operation of series-connected loads and control devices.
Bloom’s: Understand
Accessibility: Keyboard Navigation
33) An AND-type control circuit consists of switches connected in:
- A) parallel.
- B) parallel and series combination.
- C) series.
- D) series and parallel combination.
Answer: C
Difficulty: 1 Easy
Learning Objective: Explain the operation of series-connected loads and control devices.
Bloom’s: Understand
Accessibility: Keyboard Navigation
34) Three lamps are connected in parallel to a 6-V source. The voltage across each lamp would be:
- A) 12 V.
- B) 6 V.
- C) 4 V.
- D) 2 V.
Answer: B
Difficulty: 2 Medium
Learning Objective: Explain the operation of parallel-connected loads and control devices.
Bloom’s: Understand
Accessibility: Keyboard Navigation
35) A string of lamps is connected in parallel to a voltage source. If one lamp burns out, all the other lamps:
- A) will go out.
- B) will get brighter.
- C) will not be affected.
- D) will get dimmer.
Answer: C
Difficulty: 2 Medium
Learning Objective: Explain the operation of parallel-connected loads and control devices.
Bloom’s: Understand
Accessibility: Keyboard Navigation
36) If a circuit is constructed to allow the electrons to follow in only one possible path, the circuit is called:
- A) a series-parallel circuit.
- B) an open circuit.
- C) a series circuit.
- D) a parallel circuit.
Answer: C
Difficulty: 2 Medium
Learning Objective: Explain the operation of series-connected loads and control devices.
Bloom’s: Understand
Accessibility: Keyboard Navigation
37) For the circuit shown, the voltage applied to each device would be
- A) 120 V.
- B) 90 V.
- C) 60 V.
- D) 30 V.
Answer: A
Difficulty: 2 Medium
Learning Objective: Explain the operation of parallel-connected loads and control devices.
Bloom’s: Understand
Accessibility: Keyboard Navigation
38) Breadboarding refers to:
- A) building a temporary version of a circuit.
- B) building a permanent version of a circuit.
- C) troubleshooting a circuit.
- D) repairing a circuit.
Answer: A
Difficulty: 1 Easy
Learning Objective: Know the terminology involved in constructing circuits from schematics.
Bloom’s: Remember
Accessibility: Keyboard Navigation
39) When current stops flowing because of a break in a circuit, the condition is usually called
- A) an open circuit.
- B) a short circuit.
- C) a grounded circuit.
- D) an intermittent circuit.
Answer: A
Difficulty: 1 Easy
Learning Objective: Identify short and open circuit faults.
Bloom’s: Remember
Accessibility: Keyboard Navigation
40) Which is the best description of a short circuit?
- A) The control device in the circuit is bypassed and a much higher than normal voltage is applied.
- B) The load in the circuit is bypassed, and a much larger than normal current flows.
- C) The protective device in the circuit is open and a much smaller than normal current flows.
- D) The power source in the circuit is interrupted and no current flows.
Answer: B
Difficulty: 1 Easy
Learning Objective: Identify short and open circuit faults.
Bloom’s: Remember
Accessibility: Keyboard Navigation