OSHA 10 Module 2 Questions and Answers Fully Solved

OSHA 10 Module 2 Questions and Answers Fully Solved Most OSHA electrical safety guidelines and regulations for construction are contained in Subpart K, CFR 1926, Which is based on: The National Electrical code How easy or difficult it is for electricity to flow through a material measured in ohms Volts electrical pressure( measured of electrical force) Amps The volume or intensity of the electrical flow Current Electrical movement ( measured in amps) Circuit The complete path of the current; includes the electricity source, the conductor, and the output device ( such as tool, light etc.) Resistance Meaured in Ohms; the resistance of a material to the flow of electricity. Conductors Material with little resistance Gorund A conducting connection, whether intentional or accidental, between an electrical circuit or equipment and the earth, or to some conducting body that serves in place of the earth. Insulators Material with high resistance to electricity; often used to prevent electricity from getting to unwanted places. What Causes a shock A shock ocurs when your body becomes part of or completes a circuit Shocks can occur when your body completes the path with: 1. Both wires of an electric circuit 2. One wire of an energized circuit and the ground 3. A metal part that accidentally becomes energized 4. Another conductor that is carrying a current How does electricity Travel Electriicty travels in a closed circuit What are four of the most common types of Electrical injuries Four of the most common types of electrical injuries are. 1. burns 2. Electrical shock 3. Falls 4. Electrocution Electrical accidents are usually caused by a combination of three factors: 1. Unsafe equipment and/ or installation 2. Workplace made unsafe by the environment( think electrical equipment in a rain storm) 3. Unsafe work practicess Electrical Burn occurs When heat is generated by the flow of electrical current through the body, thus causing tissue damage. Arc or Flash burns occurs when electrical arc or explosion occurs with enough intensity to burn someone nearby thermal contact burns are caused By skin coming in contact with overheated electrical equipment, or when clothing ignites from a spark or other electrical incident. Conductor Insulation may be provided by Placing nonconductive material such as plastic around the conductor. Insulators help stop what Insulators help stop or reduce the flow of electrical current,which in turn helps prevent shocks, short circuits, and fires. Insulated conductor wire are usually what color Green Grounding conducting wire are usually what color Green A green wire or a green wire with yellow stripes is used to indicate what An insulated grounding wire what does GFCI Stand for Ground Fault Circuit Interrupter what does NEC stand for National Electrical Code Whats the most common OSHA electrical violation Impoper grounding of circuitry and equipment what are the two kinds of grounding 1. Electrical circuit or system grounding 2. Electrical equipment grounding. what is the three stage safe model Recognize, evaluate and control hazards Live parts of electric equipment must be _________ against accidental contact Guarded Fuse and circuit breakers must be so located or shielded that employees will not: Be burned or otherwise injured by their operation e:g., arcing why is lockout/ tag out an essential safety procdeure because it protects workers from injury while working on or near electrical circuits and equipment. OSHA electrical standards are based on The NEC What are the four main types of electrical injuries 1. Electrocution 2. Electic shock 3. Burns 4. indirect ( Fall from a ladder) electricity travels in closed circuits, and its normal route is through a conductor, and electrical shock occurs when. the body becomes part of the circuit a shock severity depends on 1. Length of exposure to electricity 2. the amount of current and its frequency 3. the current path Electrical burns arethe most serious of the three major types of burns, and most often occur On the hands, from direct contact with current Hot wires ungrounded wires that can cause a shock if you touch them, are usually what color Black or red More than 50 percent of electrocutions are caused by a worker coming in direct contact with Engerized power lines