CHST Exam Study Guide 2024 with Complete Solutions!

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 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