CHST Exam Study Guide

CHST Exam Study Guide Is a trench considered an excavation? - ✔✔Yes What is the distance a worker needs to maintain from power lines? - ✔✔10ft What does the severity of electric shock depend on? - ✔✔Path of current, a ...

CHST Exam Study Guide Is a trench considered an excavation? - ✔✔Yes What is the distance a worker needs to maintain from power lines? - ✔✔10ft What does the severity of electric shock depend on? - ✔✔Path of current, amount of current, duration of exposure True or false: electrical current as low as 75 milliamps can cause death? - ✔✔True What are some examples of surcharge loads? - ✔✔Spoils pile and equip being too close to walls What is the correct extension cord for construction? - ✔✔3 wire type designed for hard or extra hard use True or false: Exposed metal parts of equipment should be grounded - ✔✔True How does a gfci protect against electrical shock? - ✔✔Detects the difference in current between the black and white wires How can overloaded circuit hazards be controlled? - ✔✔Through the use of electrical protective devices What are some examples of electrical protective devices? - ✔✔Gfcis, fuses, circuit breakers What is static electricity? - ✔✔An electric charge that cannot move How wide must the platform of a scaffold be? - ✔✔18 inches The platform of a scaffold must be capable of supporting its weight and __________ times the maximum load. - ✔✔Four The ropes or wires used in suspension scaffolds must be capable of supporting ______ times the load. - ✔✔Six What should be used to restrain supported scaffold platforms from tipping? - ✔✔Guys, ties, or braces What is Fall Prevention? - ✔✔The process, equipment, and methods used to actually prevent a fall from occurring. What is fall protection? - ✔✔The process, equipment, and methods used to protect a worker once a fall has occurred. The top edge height of a guardrail should be _________ in. above the walking/working surface. - ✔✔42 +/- 3 What are some common hazards associated with hot work? - ✔✔-Health hazards (air contaminants from welding operations [iron oxide, zinc, beryllium, copper], burns, burns to the eyes from flashes) -Physical hazards (tripping from hoses) -fires and explosions (igniting gases, improper storage) What are some controls for the hazards created when performing hot work? - ✔✔Protect or remove fire hazards in the area, confine heat, sparks, and slag, fire extinguishing equipment available, ventilation What are some common electrical hazards? - ✔✔Exposed electrical parts, overhead power lines, inadequate wiring, defective or damaged cords and wires, improper use of flexible cords, improper grounding, overloaded circuits What are some controls utilized for electrical hazards? - ✔✔Training, planning, gfci's, fuses, circuit breakers, lockout tagout What are some common hazards associated with excavations? - ✔✔Weight (nearby vehicles/equipment), vibration, underground utilities, water and soil erosion. What is a surcharge load? - ✔✔The spoils pile and the equipment being too close to the vertical walls of the trench. What are some common controls used to mitigate excavation hazards? - ✔✔Sloping, shoring, shields, rpe designed protective systems, soil classification. What are some common hazards associated with working at heights? - ✔✔slipping, unsafe access, lack of fall protection, scaffold collapse, bad planking, unguarded edges, What are some controls to mitigate hazards when working at heights? - ✔✔Fall prevention equipment, guardrails, positioning device system, warning line systems, controlled access zone, safety monitoring system, personal fall arrest system, safety net system What are some common hazards associated with working in confined spaces? - ✔✔Hazardous atmosphere, engulfment, trapped, asphyxiated What are some controls to mitigate the hazards associated with confined spaces? - ✔✔Isolation, entry supervisor, atmospheric monitoring, rescue service/equipment What are some common struck by hazards? - ✔✔Falling tools, debris, or material. moving machinery, crane What are some controls to mitigate struck by hazards? - ✔✔Barricade area below where overhead work is being performed. Signs. Safety net. Tool belt lanyards. Barricade crane operation area What are some common caught-in or caught-between hazards? - ✔✔Unguarded machinery, caught between a vehicle and a moving object, caught between two objects, caught in a piece of equipment or machinery What are some common controls to mitigate caught-between hazards? - ✔✔Properly guarded machinery, barricades, train workers, lock out tagout What are some common hazards associated with hoisting and rigging? - ✔✔improper use of tagline, use of equip near energized lines, defective equipment, loads swung or suspended overhead What are some common controls to mitigate hazards associated with rigging and hoisting? - ✔✔guardrails, equipment inspections, proper use of tag line, training, using proper equip for load What are some common hazards associated with crane operations? - ✔✔Frayed wire rope, overhead power lines, defective equipment, moving equipment/personnel, improper use What are some common controls to mitigate hazards associated with crane operations? - ✔✔rated load capacity, rcommended operating speeds, hazard warnings, training, hand signals, pre-use inspections, annual inspection of hoisting equipment, lockout tagout, 10ft away from lines What are some common hazards associated with material handling? - ✔✔strains and sprains, fractures and bruises from being struck by or caught in between material, cuts and bruises What are some common controls to mitigate material handling hazards? - ✔✔Seek help, hand & forearm protection, eye protection, steel-toed shoes, metatarsals, blocking loads What are some common hazards associated with material storage? - ✔✔Improperly stacked materials, poor housekeeping, slips trips and falls, falling material, sliding material, weight limit or height limit exceed What are some common controls to mitigate material storage hazards? - ✔✔observe height limits, remove all nails from used lumber, stack lumber, store pipe in racks, stack loose bricks no more than 7 ft in height The platform of a scaffold must be fully planked or decked with no more than _________ in. gap. - ✔✔1 What are some common hazards associated with housekeeping? - ✔✔tripping over loose objects on floors, stairs and platforms, being hit by falling objects, slipping on greasy, wet, or dirty surfaces, striking against projecting, poorly stacked items or misplaced material, cutting, puncturing, or tearing the skin of hands or other parts of the body on projecting nails, wire, o steel strapping. fuel for fire What are some common controls to mitigate poor housekeeping practices? - ✔✔dust control, clear clutter, store materials properly, replace damaged flooring, keep aisles and exits clear, install mirrors and warning signs, clean up spills, store combustible materials in the work area in small amounts and keep in safe storage What are some common hazards associated with powder actuated tools? - ✔✔inadvertent firing, failure to fasten properly, failure to operate properly when loaded, fires, injury to bystanders, tool jam, material spills What are some controls to mitigate the hazards associated with powder actuated tools? - ✔✔Visually inspect prior to use, proper training, use recommended charges, if possible fire a test round, wear proper eye protection, do not refire What are some common hazards associated with hand and power tools? - ✔✔misuse and improper maintenance, falling flying abrasive, and splashing objects or exposure to harmful dusts, fumes, mists, vapors, or gases, wooden handles becoming loose and flying off, What are some controls to mitigate hazards associated with hand and power tools? - ✔✔Keep all tools in good condition with regular maintenance, use the right tool for the job, examine each tool for damage before use, operate all tools according to the manufacturer's instructions, provide and use the proper ppe What are some common hazards associated with asbestos exposure? - ✔✔inhalation of fibers, insulation, floor tiles, vehicle brakes, - buildup of scar like tissue in the lungs - disability or death What are some controls to mitigate asbestos exposure? - ✔✔Employee exposure monitoring, training, regulate areas, control work practices, ppe, What are some common hazards associated with lead exposure? - ✔✔Lead dust or fumes cause brain disorders, anemia, nerve disorders, high blood pressure, kidney disorders, reproductive disorders, decreased red blood cells, slowed reflexes. Lead exposure may take place in demo, salvage, removal, renovation, and cleanup What are some common controls to mitigate lead exposure? - ✔✔Air monitoring, mechanical ventilation, administrative controls, ppe, respiratory protection What are some common hazards associated with noise exposure? - ✔✔chipping, hammering, grinding, drilling, generator, heavy equipment, processes - cause hearing loss, impairment, temporary or permanent What are some common controls to mitigate hazards created by noise? - ✔✔Hearing protection, lo/to, training, hearing conservation program, identify hearing protection zones, separate noisy work area, sound absorbing material, limit exposure, avoid metal to metal contact, keep equipment well maintained, identify areas that require hearing protection What is ionizing radiation? - ✔✔Radiation with enough energy to detach electrons from atoms or molecules What is non-ionizing radiation? - ✔✔A series of energy waves composed of oscillating electric and magnetic fields traveling at the speed of light. What are some common hazards