ATT Test 1 (Latest 2024/ 2025 Update) Questions and Verified Answers| 100% Correct| Grade A
ATT Test 1 (Latest 2024/ 2025 Update)
Questions and Verified Answers| 100%
Correct| Grade A
Q: Arc burns
Answer:
High temperatures near the body produced by electric arc or explosion
Q: Thermal contact burns
Answer:
When skin comes in contact with hot surfaces of overheated electrical conductors
Q: Electrical Arcs
Answer:
Where short circuit occurs; may cause fires
Q: Extremely high arcs
Answer:
Damage equipment dispersing metal fragments
Q: Low energy arcs
Answer:
Explode containing flammable gas, vapors, or combustible dusts
Q: Factors of electrical accidents
Answer:
- Unsafe equipment 2. Unsafe environment 3.unsafe work practices
Q: Insulator
Answer:
Any material with high resistance to electrical current
Q: Identify conductors and cables
Answer:
American wire gauge size, max voltage, temperature & manufacturers name or trademark
Q: Grounding conductors
Answer:
Green or green with yellow
Q: Circuit completing conductors
Answer:
Gray colored
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Electrical Shock Sensation and muscular spasm cause when electric current passes through the body
Voltage Potential of electric energy; pressure of electrons pushing away from each other
Current Flow of electrons
Most dangerous paths Hand to hand & left hand to either foot
Factors affecting shock Amount of current, path of current, amount of body resistance, length of time current flows in body
3 ways to prevent shock Isolate, insulate & ground
Grounding conductor Used to form a low resistance path from the ground to the metallic tool case
12MA Minimum AC current required to cause severe muscle contractions
The body Acts like a conductor when it becomes part of a circuit
5xs How much more DC is required to freeze the body rather than AC
Burns Electrical burns, arc burns, thermal contact burns
Electrical burns Electrical current flowing through tissue or bones
Arc burns High temperatures near the body produced by electric arc or explosion
Thermal contact burns When skin comes in contact with hot surfaces of overheated electrical conductors
Electrical Arcs Where short circuit occurs; may cause fires
Extremely high arcs Damage equipment dispersing metal fragments
Low energy arcs Explode containing flammable gas, vapors, or combustible dusts
Factors of electrical accidents 1. Unsafe equipment 2. Unsafe environment 3.unsafe work practices
Insulator Any material with high resistance to electrical current
Identify conductors and cables American wire gauge size, max voltage, temperature & manufacturers name or trademark
Grounding conductors Green or green with yellow
Circuit completing conductors Gray colored
Ungrounded conductors Any color other than green white or gray
50 voltz Must be guarded against accidental contact
600 volts or more Made with metal enclosed equipment or enclosed in a vault or area with lock
Grounding Conductive connection between electrical circuit and the earth or ground plane
Types of grounds Service system and equipment
Ungrounded conductors Any color other than green white or gray
600 volts or more Made with metal enclosed equipment or enclosed in a vault or area with lock
50 voltz Must be guarded against accidental contact
Grounding
Circuit protection devices Fuses, circuit breakers and ground-fault circuit interrupters
Ground-fault circuit interrupters