INDUSTRIAL WIRING 2: ELECTRICAL MOTOR
CONTROLS FOR INTEGRATED SYSTEMS – CHAPTER 2
TECH CHECK: COMPLETE SYMBOL MASTERY &
CIRCUIT ANALYSIS STUDY GUIDE
1. Which drawing type shows the physical details of an object as seen by the
eye?
A. Schematic
B. Wiring
C. Pictorial
D. Line
Correct Answer: C
Explanation: Pictorial drawings are designed to show the physical appearance of
an object, much like a photograph would, making it easier to visually identify
components.
2. What does an ellipse indicate in a flow chart?
A. A decision point
B. A process step
C. The beginning or end of a section
D. A connection to another page
Correct Answer: C
Explanation: In a flow chart, an ellipse is used to denote the start or end of a
process, clearly defining the boundaries of the procedural sequence.
3. What is the primary characteristic of a conductor?
A. High resistance to current flow
B. Very little resistance to current flow
C. It converts energy from one form to another
,D. It stores electrical energy
Correct Answer: B
Explanation: Conductors are materials that offer very little resistance to the flow of
electric current, allowing electrons to move through them with relative ease.
4. What is the most commonly used material for conductors?
A. Aluminum
B. Silver
C. Gold
D. Copper
Correct Answer: D
Explanation: Copper is the industry standard for conductors due to its excellent
conductivity and cost-effectiveness.
5. What is a graphic element that represents a quantity or unit called?
A. An abbreviation
B. A symbol
C. A reference designation
D. A number
Correct Answer: B
Explanation: A symbol is a standardized graphic element used on diagrams to
represent a specific electrical or electronic component, quantity, or unit.
6. A diagram that uses single lines and graphic symbols to indicate the path and
components of an electrical circuit is a:
A. Schematic diagram
B. One-line diagram
C. Wiring diagram
D. Block diagram
Correct Answer: B
Explanation: A one-line (or single-line) diagram simplifies a three-phase power
system by representing it with a single line and standard symbols to show the path
and major components.
,7. A wiring diagram is primarily intended to show:
A. The logic of a circuit
B. The connection of all components
C. The sequence of operations
D. The physical location of components
Correct Answer: B
Explanation: The main purpose of a wiring diagram is to illustrate the physical
connections and interconnections of all components in a piece of equipment,
which aids in installation and troubleshooting.
8. What is the first letter of the designation for a Control Relay?
A. C
B. R
C. CR
D. M
Correct Answer: A
Explanation: As per NEMA standards, the designation for a control relay is 'CR',
starting with the letter 'C'.
9. What does an OCPD provide in an electrical circuit?
A. Voltage regulation
B. Power conversion
C. Overcurrent protection
D. Control logic
Correct Answer: C
Explanation: An Overcurrent Protection Device (OCPD), such as a circuit breaker or
fuse, is designed to protect the circuit from damage caused by excessive current.
10. Which type of diagram is used to show the relationship between circuits but
not their actual physical location?
A. Pictorial
B. Wiring
C. Block
D. Line (Ladder)
, Correct Answer: D
Explanation: A line or ladder diagram focuses on the electrical relationships and
control logic of circuits, abstracting away physical location to show how the
components are interconnected electrically.
11. Which of the following is a type of capacitor that is polarity sensitive and can
explode if installed backwards?
A. Non-polarized capacitor
B. Feed-through capacitor
C. Electrolytic capacitor
D. Shielded capacitor
Correct Answer: C
Explanation: Electrolytic capacitors use a chemical electrolyte and are polarized.
Reversing the polarity can cause a chemical reaction leading to rupture or
explosion.
12. What is a letter or combination of letters that represents a word called?
A. A symbol
B. An abbreviation
C. A mnemonic
D. A designation
Correct Answer: B
Explanation: An abbreviation is a shortened form of a word or phrase used in
technical documentation for brevity and clarity.
13. A dashed line in a circuit breaker symbol indicates that multiple poles are:
A. Electrically connected
B. Mechanically linked
C. Thermally isolated
D. Magneticaly coupled
Correct Answer: B
Explanation: When poles of a circuit breaker are mechanically linked, it is indicated
by a dashed line across their symbols, showing that they operate together.
CONTROLS FOR INTEGRATED SYSTEMS – CHAPTER 2
TECH CHECK: COMPLETE SYMBOL MASTERY &
CIRCUIT ANALYSIS STUDY GUIDE
1. Which drawing type shows the physical details of an object as seen by the
eye?
A. Schematic
B. Wiring
C. Pictorial
D. Line
Correct Answer: C
Explanation: Pictorial drawings are designed to show the physical appearance of
an object, much like a photograph would, making it easier to visually identify
components.
2. What does an ellipse indicate in a flow chart?
A. A decision point
B. A process step
C. The beginning or end of a section
D. A connection to another page
Correct Answer: C
Explanation: In a flow chart, an ellipse is used to denote the start or end of a
process, clearly defining the boundaries of the procedural sequence.
3. What is the primary characteristic of a conductor?
A. High resistance to current flow
B. Very little resistance to current flow
C. It converts energy from one form to another
,D. It stores electrical energy
Correct Answer: B
Explanation: Conductors are materials that offer very little resistance to the flow of
electric current, allowing electrons to move through them with relative ease.
4. What is the most commonly used material for conductors?
A. Aluminum
B. Silver
C. Gold
D. Copper
Correct Answer: D
Explanation: Copper is the industry standard for conductors due to its excellent
conductivity and cost-effectiveness.
5. What is a graphic element that represents a quantity or unit called?
A. An abbreviation
B. A symbol
C. A reference designation
D. A number
Correct Answer: B
Explanation: A symbol is a standardized graphic element used on diagrams to
represent a specific electrical or electronic component, quantity, or unit.
6. A diagram that uses single lines and graphic symbols to indicate the path and
components of an electrical circuit is a:
A. Schematic diagram
B. One-line diagram
C. Wiring diagram
D. Block diagram
Correct Answer: B
Explanation: A one-line (or single-line) diagram simplifies a three-phase power
system by representing it with a single line and standard symbols to show the path
and major components.
,7. A wiring diagram is primarily intended to show:
A. The logic of a circuit
B. The connection of all components
C. The sequence of operations
D. The physical location of components
Correct Answer: B
Explanation: The main purpose of a wiring diagram is to illustrate the physical
connections and interconnections of all components in a piece of equipment,
which aids in installation and troubleshooting.
8. What is the first letter of the designation for a Control Relay?
A. C
B. R
C. CR
D. M
Correct Answer: A
Explanation: As per NEMA standards, the designation for a control relay is 'CR',
starting with the letter 'C'.
9. What does an OCPD provide in an electrical circuit?
A. Voltage regulation
B. Power conversion
C. Overcurrent protection
D. Control logic
Correct Answer: C
Explanation: An Overcurrent Protection Device (OCPD), such as a circuit breaker or
fuse, is designed to protect the circuit from damage caused by excessive current.
10. Which type of diagram is used to show the relationship between circuits but
not their actual physical location?
A. Pictorial
B. Wiring
C. Block
D. Line (Ladder)
, Correct Answer: D
Explanation: A line or ladder diagram focuses on the electrical relationships and
control logic of circuits, abstracting away physical location to show how the
components are interconnected electrically.
11. Which of the following is a type of capacitor that is polarity sensitive and can
explode if installed backwards?
A. Non-polarized capacitor
B. Feed-through capacitor
C. Electrolytic capacitor
D. Shielded capacitor
Correct Answer: C
Explanation: Electrolytic capacitors use a chemical electrolyte and are polarized.
Reversing the polarity can cause a chemical reaction leading to rupture or
explosion.
12. What is a letter or combination of letters that represents a word called?
A. A symbol
B. An abbreviation
C. A mnemonic
D. A designation
Correct Answer: B
Explanation: An abbreviation is a shortened form of a word or phrase used in
technical documentation for brevity and clarity.
13. A dashed line in a circuit breaker symbol indicates that multiple poles are:
A. Electrically connected
B. Mechanically linked
C. Thermally isolated
D. Magneticaly coupled
Correct Answer: B
Explanation: When poles of a circuit breaker are mechanically linked, it is indicated
by a dashed line across their symbols, showing that they operate together.
