UNit M2UB
What is the difference between Type I protection and Type II protection in a hard hat?
A Type I protection in a hard hat only protects against blows on the top of the head. A Type II protection in a hard hat protects the head against blows on the sides and top.
Electrical Protective PPE (rubber insulating gloves, dielectric footwear) Hazards:
Electrical personal protective equipment is used by workers to protect one from electric shock.
Eye and Face Protective Equipment (safety glasses, goggles, face shields) Hazards:
Employees working with corrosive chemicals and other hazardous substances wear eye and face protection to prevent injury and death. Other hazards requiring eye protection include: working with machines, grinding equipment and hand tools, welding, cutting, and soldering. Also, being exposed to hazardous gases, mists, fumes, and dust requires eye protection.
Personal fall arrest system (harnesses, anchorages, lanyards) Hazards:
Fall protection equipment protects one from the dangers of falling from high places, resulting in workplace injury and death.
Hearing Protection (earplugs and earmuffs) Utility industry tasks or work areas requiring hearing protection:
Chainsaw operators and tree trimmers require hearing protection.
Describe the three safety vest classes:
All classes are brightly colored, fluorescent material to increase visibility. Class I vests are used in areas where the speed limit does not exceed twenty-five miles per hour. Areas where workers require visibility and the speed limit exceeds twenty-five miles per hour are required to wear Class II vests. Areas that require greater visibility, high-risk areas, and the speed limit exceeding fifty miles per hour require Class III vests' usage.
Respiratory Protection (air-purifying respirators, disposable respirators, self-contained breathing apparatus) Utility industry tasks or work areas requiring protective clothing:
Any task can require a respirator for protection from harmful airborne contaminants or atmospheres and assistance in breathing
What is the difference between a hard hat and a bump hat?
Bump hats are designed to withstand hitting one's head in low clearance areas and are not ANSI approved. Hard hats are used by workers to reduce the risk of head injury from falling objects or electric hazards.
Electrical Protective PPE (rubber insulating gloves, dielectric footwear) Utility industry tasks or work areas requiring protective equipment:
Chain saw operators, tree trimmers, transmission, and distribution workers, such as linemen, require protective equipment. Also, tasks such as connecting and disconnecting meters require protective equipment.
What is the difference between Class E protection and Class G protection in a hard hat?
Class E protection hard hats are tested in labs to withstand 20,000 volts while Class G protection hard hats are tested in labs to withstand 2,200 volts.
List at least five examples of electrical hazards that can cause fire and explosions.
Defective or improper use of electrical equipment can cause electrical fires. Electric hazards that cause electrical explosions include: arcing, overheating, friction, static electricity, electrical current leakage, faults, and other electrical hazards that can cause fire and explosions.
List at least five examples of electric shock hazards.
Electric shock hazards include inadequate wiring, exposed electrical components, overhead power lines defective insulation, improper grounding, electrical overload, wet conditions, faulty tools or equipment, and improper PPE use.
Describe and give the letter to four types of fires.
Four classes of fires are Class: A, B, C, and K. A class A fires are started by combustible materials such as wood, paper, cloth, rubber, and most plastics. Flammable liquids such as gasoline, oils, grease solvents, and lacquers all-cause Class B fires. Electricity in energized equipment and electrical fires start all class C fires. Vegetable and animal oils and fats start class K fires.
Head Protective Equipment (hard hats) Hazards:
Head protection is required to protect one from falling objects that can fall from above and strike and penetrate the skull. Other hazards that require head protective equipment include low clearance areas on objects such as exposed pipes and beams where one can bump one's head. Head protection protects one from electricity, which can cause electric shock and burns.
Hearing Protection (earplugs and earmuffs) Hazards:
Hearing protection must be implemented by both employers and employees when exposed to deafening noises a certain amount of time a day. OSHA defines the acceptable exposure limits for employees and employers before hearing protection is required.
Describe the three kinds of gloves that do not protect against electrical hazards:
Leather, canvas, and metal mesh gloves do not protect against electrical hazards but protect against cuts and burns. Also, fabric and fabric coated gloves can protect against dirt and abrasions and are slip-resistant. Chemical and Liquid resistant gloves can not protect against electric hazards. However, they protect against chemicals and liquids due to their composition, usually natural rubber or synthetic rubber-like material—moreover, the thicker the chemical and liquid resistant glove, the more significant the chemical resistance. However, one must choose the appropriate glove depending on the chemical used.
Eye and Face Protective Equipment (safety glasses, goggles, face shields) Utility industry tasks or work areas requiring eye or face protection:
Masonry, welding, soldering, furnace operations, acid and chemical handling and, woodworking require eye or face protection. Other utility industry tasks requiring eye or face protection include substation workers, transmission and distribution workers, meter readers, chainsaw operators, tree trimmers. Moreover, connecting and disconnecting meters require eye or face protection.
Respiratory Protection (air-purifying respirators, disposable respirators, self-contained breathing apparatus) Hazards:
Respirators are used by workers to protect against airborne contaminants to reduce injury or illness caused by breathing hazards such as harmful dust, fogs, fumes, mists, gases, smokes, sprays, or vapors. Moreover, oxygen-deficient and immediately dangerous to life or health atmospheres are hazards that respirators protect against
Head Protective Equipment (hard hats) Utility industry tasks or work areas requiring head protection:
The electric industrial, sewage, lumber, and welding industries require head protection. Also, chainsaw operators, tree trimmers, and transmission and distribution workers require head protection. Furthermore, tasks such as connecting and disconnecting meters require protective equipment.
Protective eyewear should be replaced when:
The lenses are dirty, pitted, scratched, have sustained frame damage, or have other defects that obscure vision. Employers and employees should replace protective eye-ware when the headband is damaged, loses its elasticity, or cannot secure the eye-ware.
Describe three types of fall protective equipment:
The three types of fall protective equipment are the fall arrest system, work positioning equipment, and travel restricting equipment. The fall arrest system catches a worker who is falling. Work positioning equipment includes rappelling equipment that allows for the suspension or workers by ropes to gain access to their area of work. Travel restricting equipment, also known as fall restricting equipment, protects workers from falls by anchoring a worker to keep him away from the edge.
Protective Shoes and Clothing—nonelectrical (work gloves, safety vests, steel toe boots, flame-resistant clothing) Utility industry tasks or work areas requiring protective clothing:
These tasks are directing traffic, welding, construction, and handling hot and chemical substances. Chainsaw operators, tree trimmers, tasks requiring work on dead and grounded lines are required to wear protective footwear. Chainsaw operators and tree trimmers are required to wear protective clothing. The following tasks require fire-resistant clothing: connecting and disconnecting meters, working on energized lines or underground power sources on substations, and the transmission and distribution systems.
What defects in a hard hat indicate it should not be used?
When there is a perforation, cracking, or other deformities of the hard hat's brim or shell, one should not use the hard hat. Other defects that indicate workers should not wear a hard hat are loss of surface gloss, flaking, and chalking, signifying the brim or shell's exposure to the following: heat, chemicals, ultraviolet light, and other radiation.
Protective Shoes and Clothing—nonelectrical (work gloves, safety vests, steel toe boots, flame-resistant clothing) Hazards:
Workers may be required to wear protective footwear if working with or exposed to the following: hazardous chemicals or substances, or there is a potential for foot injuries caused by objects falling, rolling, or piercing the sole. Flame resistant clothing protects clothing from fires due to electrical arcs.
Workers may not wear and use a respirator (because the seal may fail) if they have the following:
Workers may not wear or use a respirator if they have the following: facial hair, personal protection equipment interfering with usage, and any condition interfering with face-to-face-seal and valve function.
Personal fall arrest system (harnesses, anchorages, lanyards) Utility industry tasks or work areas requiring protective clothing:
Workers working from heights use fall protection equipment in the following situations, transmission and distribution workers working on overhead power lines.
What defects in a respirator indicate it should not be used? The following defects indicate one should not use a respirator:
a dirty filter, damaged valves and hoses, damaged or illegible labels, and tears or other damage to face seal, and difficulty breathing. Seal leaks, distorted face pieces, and the respirator strap's loss of elasticity indicate that a worker should not use the respirator.