CHST Exam Questions With Correct Answers Latest Update (Verified)

CHST Exam Questions With Correct Answers Latest Update (Verified) Is a trench considered an excavation? - ANSWER Yes What is the distance a worker needs to maintain from power lines? - ANSWER 10ft What does the severity of electric shock depend on? - ANSWER Path of current, amount of current, duration of exposure True or false: electrical current as low as 75 milliamps can cause death? - ANSWER True What are some examples of surcharge loads? - ANSWER Spoils pile and equip being too close to walls What is the correct extension cord for construction? - ANSWER 3 wire type designed for hard or extra hard use True or false: Exposed metal parts of equipment should be grounded - ANSWER True How does a gfci protect against electrical shock? - ANSWER Detects the difference in current between the black and white wires How can overloaded circuit hazards be controlled? - ANSWER Through the use of electrical protective devices What are some examples of electrical protective devices? - ANSWER Gfcis, fuses, circuit breakers CHST Exam Questions With Correct Answers Latest Update (Verified) What is static electricity? - ANSWER An electric charge that cannot move How wide must the platform of a scaffold be? - ANSWER 18 inches The platform of a scaffold must be capable of supporting its weight and __________ times the maximum load. - ANSWER Four The ropes or wires used in suspension scaffolds must be capable of supporting ______ times the load. - ANSWER Six What should be used to restrain supported scaffold platforms from tipping? - ANSWER Guys, ties, or braces What is Fall Prevention? - ANSWER The process, equipment, and methods used to actually prevent a fall from occurring. What is fall protection? - ANSWER 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. - ANSWER 42 +/- 3 What are some common hazards associated with hot work? - ANSWER -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? - ANSWER Protect or remove fire hazards in the area, confine heat, sparks, and slag, fire extinguishing equipment available, ventilation What are some common electrical hazards? - ANSWER 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? - ANSWER Training, planning, gfci's, fuses, circuit breakers, lockout tagout What are some common hazards associated with excavations? - ANSWER Weight (nearby vehicles/equipment), vibration, underground utilities, water and soil erosion. What is a surcharge load? - ANSWER 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? - ANSWER Sloping, shoring, shields, rpe designed protective systems, soil classification. What are some common hazards associated with working at heights? - ANSWER slipping, unsafe access, lack of fall protection, scaffold collapse, bad planking, unguarded edges, What are some controls to mitigate hazards when working at heights? - ANSWER 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? - ANSWER Hazardous atmosphere, engulfment, trapped, asphyxiated What are some controls to mitigate the hazards associated with confined spaces? - ANSWER Isolation, entry supervisor, atmospheric monitoring, rescue service/equipment What are some common struck by hazards? - ANSWER Falling tools, debris, or material. moving machinery, crane What are some controls to mitigate struck by hazards? - ANSWER 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? - ANSWER 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? - ANSWER Properly guarded machinery, barricades, train workers, lock out tagout What are some common hazards associated with hoisting and rigging? - ANSWER 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? - ANSWER guardrails, equipment inspections, proper use of tag line, training, using proper equip for load What are some common hazards associated with crane operations? - ANSWER 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? - ANSWER 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? - ANSWER 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? - ANSWER Seek help, hand & forearm protection, eye protection, steel-toed shoes, metatarsals, blocking loads What are some common hazards associated with material storage? - ANSWER Improperly stacked materials, poor housekeeping, slips trips and falls, falling material, sliding material, weight limit or height limit exceed