Module 3—Introduction to Circuit Protection, Control, and Measurement
i - ix
, 1-1 to 1-10
1-11 to 1-20
, 1-21 to 1-30
1-31 to 1-40
, 1-41 to 1-50
1-51 to 1-60
, 1-61 to 1-70
1-71 to 1-73
2-1 to 2-10
, 2-11 to 2-20
1-21 to 2-30
, 2-31 to 2-40
2-41 to 2-42
, 3-1 to 3-10
3-11 to 3-20
, 3-21 to 3-30
33-31 to 3-39
AI-1 to AI-3
,, AII-1 to AII-2
AIII-1 to AIII-10
Isometric Diagram—Shows the outline of a ship, airplane, or piece of equipment. This
diagram shows the components and the cable runs between the components. This diagram is used to locate components
in a system.
Block Diagram—Shows the components in block form. Block diagrams are used in
conjunction with text material. They are used to present a general description of a system and its functions.
Single-Line Diagram—Used for essentially the same purpose as the block diagram-to show
the basic functions of a circuit.
Schematic Diagram—Shows, through graphic symbols, the electrical connections and
functions of a specific circuit arrangement. It is used to trace the circuit without regard to the physical size,
shape, or location of the component devices or parts. A schematic diagram shows the overall operation of a system.
It is used during troubleshooting to identify possible circuit malfunction locations.
Diagram—Is a detailed diagram of each circuit installation showing all wiring, connectors, terminal
boards, and the electrical or electronic components of the circuit. It also identifies the wire-by- wire numbers
or color coding. This diagram must be used in conjunction with a schematic diagram to troubleshoot a system in
order to find the test point for voltage and resistance checks.
Terminal Diagram—Is used
in connecting wiring to terminal boards, relays, switches, and other
components of a circuit.
Safety—All individuals are responsible for understanding and complying with safety
standards and regulations established to prevent injury to themselves and others and damage to property and
Having safe working habits and adhering to safety precautions protects YOU and YOUR SHIPMATES. Follow
safety precautions to the letter. DO NOT TAKE CHANCES. Carelessness could cost you your life.
ANSWERS TO QUESTIONS Q1. THROUGH Q18.
A1. To provide the technician with a means to trace the wires when troubleshooting and repairing
electrical and electronic systems.
A2. In the technical manual for the equipment.
Individual cable in a specific circuit.
A4. Wire segment letter.
A5. The conductor
connections both "to" and "from."
A6. To prevent electrical shock to the operator in case there is an electrical short to the frame of the
appliance or too.
A7. A pictorial diagram.
A8. An isometric diagram.
or single-line diagram.
A10. A schematic diagram.
A11. Between point (3) and the gas gauge
tank unit ground.
A12. Only the brake lights.
A13. Wiring diagram.
A14. To find the test points.
A15. Terminal diagram.
A16. Adequate ventilation.
A17. Approved meters or other indicating devices.
A18. By use
of a cleaning cloth.
Introduction to Matter, Energy, and Direct Current,
to Alternating Current and Transformers, Introduction to Circuit Protection,
Control, and Measurement
, Introduction to Electrical Conductors, Wiring Techniques,
and Schematic Reading
, Introduction to Generators and Motors
Introduction to Electronic Emission, Tubes, and Power Supplies,
Introduction to Solid-State Devices and Power Supplies
Introduction to Amplifiers, Introduction to
Wave-Generation and Wave-Shaping Circuits
, Introduction to Wave Propagation, Transmission
Lines, and Antennas
, Microwave Principles,
, Introduction to Number Systems and Logic Circuits, Introduction
to Microelectronics, Principles of Synchros, Servos, and Gyros
Introduction to Test Equipment
, Radar Principles,
The Technician's Handbook,
Master Glossary, Test Methods and Practices,
Introduction to Digital Computers,
Magnetic Recording, Introduction to Fiber Optics