Crane Safety and Emergency Procedures Questions and Complete Solutions Graded A+

Crane Safety and Emergency Procedures Questions and Complete Solutions Graded A+ 1. Stay calm. 2. Try to reverse the action that caused the contact. 3. Remain in the cab. 4. If you must leave the crane jump from the lowest point and land with your feet together. Do not touch the crane again. 5. Shuffle away from the crane taking very small steps. - Answer: Describe in detail the 5 steps that should be taken if contact is made with an energized powerline? Electrocution from power line contact - Answer: What is one of the most common causes of injuries and fatalities for riggers and crane operators? OSHA: legally binding; enforceable with fines and jail time ASME and ANSI: National consensus standards; not law, but a collection of best practices Note: If a specific ANSI or ASME standard is cited by OSHA, then that portion becomes legally enforceable - Answer: What is the difference between OSHA, ANSI and ASME standards? ASME B30.5, Mobile and Locomotive Cranes - Answer: What is generally the most important ASME standard that relates to mobile cranes? 29 CFR 1926, Subpart CC - Answer: What is generally the most important OSHA standard that relates to mobile cranes in the construction industry? ASME P30.1, Planning for Load Handling Activities - Answer: What is the most important ASME standard that relates to lift planning? Daily - Answer: Generally speaking, how often should rigging equipment get inspected? Considered hazardous and avoided - Answer: Suspending the load just above the landing point and then placing the necessary blocking to support it is ______. Only after the load is balanced - Answer: When should tag lines be attached? The crane operators manual - Answer: What piece of literature must always be in the cab of mobile cranes? Riggers, oilers and other personnel can be crushed while the operator swings the crane. - Answer: Why must the swing path of cranes be barricaded? In a conspicuous are near crane operations - Answer: Where must hand signal charts be posted? Display/speak the Stop or Emergency Stop signal. Crane operators are required to obey this command regardless of its source. - Answer: If a person, not part of a lift team, recognizes a safety issue, what should they do? 1. The hazards present for people involved 2. Hazards that are near the lifting operation 3. The difficulty of the lift 4. Weather and other environmental hazards 5. Rated capacities of the crane and rigging equipment 6. Potential for commercial impact should the operation not go as planned 7. Other unique site requirements such as ground conditions, buried drainage pipes, etc. - Answer: What are some items that should be discussed in standard pre-lift meetings? A standard lift verbally discusses factors that contribute to the lift. A critical lift documents the factors that contribute to the lift. - Answer: What is the difference between a standard lift and a critical lift? 75% - Answer: What is generally acknowledged as the capacity limitation that separates a standard lift from a critical lift? 75% - Answer: According to 29 CFR 1926.751, Steel Erection, what is the capacity limitation that separates a standard lift from a critical lift? That area that crane operations cannot occur unless the powerlines have been rendered safe by the electric company that owns them. - Answer: What is a prohibited zone in the context of power lines? That area above and below power lines that is outside the prohibited zone. Crane operations in this area should be avoided. - Answer: What is an avoidance zone in the context of power lines? When the boom is fully extended it cannot possibly enter the prohibited zone. - Answer: What conditions must be satisfied in order to operate a crane in the avoidance zone of power lines? Only if the boom cannot enter the prohibited zone while it is raised to its highest angle and fully extended. - Answer: When is it acceptable to operate a crane under an energized powerline? Crane C - Answer: Which of these cranes cannot perform their intended lift? 10 feet - Answer: What is the minimum safe operating distance to a powerline that is energized with 1,000 volts? 20 feet - Answer: What is the minimum safe operating distance to a powerline that is energized with 300,000V? 35 feet - Answer: What is the minimum safe operating distance to a powerline that is energized with 600kV? 10 feet - Answer: What is the minimum safe operating distance to a powerline that is energized with 17.2kV? 4 feet - Answer: What is the minimum safe distance to a powerline during transit that is energized with 500V? 6 feet - Answer: What is the minimum safe distance to a powerline during transit that is energized with 800V? 10 feet - Answer: What is the minimum safe distance to a powerline during transit that is energized with 300,000V? 16 feet - Answer: What is the minimum safe distance to a powerline during transit that is energized with 350kV? 1. A meeting must be held with the lift team discussing how to remain outside the prohibited zone. 2. Non-conductive tag lines should be used. 3. Erect a visual aid for the operator for the operator to use as a guide to remain outside the prohibited area. If the operator cannot see the visual aid, a spotter must be used. 4. If a spotter must be used, at least one of the following must be used: a) An insulating link b) A high-voltage proximity warning device c) An automatic warning device that tells the operator to stop movement of the boom/load line. d) An automatic movement limiting device. - Answer: If operating near an energized powerline (but outside the prohibited area) is unavoidable, what steps should be taken to ensure it is done safely? When the operator cannot clearly see the visual aids. - Answer: When are spotters required while operating near energized powerlines? Moisture and contamination (dirt, metal shavings, weld spatter, etc.) - Answer: Nonconductive taglines should always be used when operating near energized powerlines. What can cause taglines to become conductive? Call the utility company and ask for guidance regarding the prohibited zones. - Answer: What are the requirements for operating near powerlines on a windy day? The crane cab - Answer: Where is the safest place for an operator is energized powerlines are contacted? 1) Attempt to reverse the action that caused the contact. 2) If the crane doesn't function, remain in the cab. 3) If there is an immediate danger of fire or explosion, dismount the crane at its lowest point by jumping off and landing with your feet together and not touching the crane again. 4) Shuffle or hop away from the crane taking very small steps. - Answer: If power line contact occurs, what are the steps (in order) that should be taken? It decreases - Answer: What happens to voltage in the ground as the radius increases around the crane after power line contact? Yes - Answer: If you hear thunder or see lightning but it appears to be 8 miles away, do you need to cease operations? More than 35mph wind speed - Answer: According to this wind reduction chart, at what point must all crane operations stop? Wind speeds above 30 mph. The boom can be blown over backwards. - Answer: According to this chart, when must there must be at least a 4,500 pound block used when the the boom angle is above 80 degrees. Why? The manufacturers recommendations found in the operators manual. - Answer: Where should a person look to find the capacity reductions or shut down point for crane operations in windy environments? Plywood, curtain wall, sheet piles, sheet metal, etc. - Answer: Name some loads that are relatively light but can still cause lifting operations to stop in windy circumstances. Honk the horn twice - Answer: What is the signal a crane operator may use when they are about to move the crane forward? Honk the horn three times - Answer: What is the signal a crane operator may use when they are about to move the crane backward? 50% - Answer: Personnel platforms gross loads (platform weight included) cannot exceed what percent of a crane's capacity at the farthest necessary radius? At the beginning of the shift, any time the crane is moved to a new location and when lifting routes change and new hazards arise. - Answer: When are trial lifts required for personnel platforms? Every time the crane enters a new jobsite and after repairs or modifications the the personnel platform. - Answer: How often must proof tests on personnel platforms be done? 150% - Answer: After modification, personnel platforms are tested to what percent of their rated capacity? 125% - Answer: What is the standard proof test load for a personnel platform? The signal person - Answer: All personnel in a personnel basket must keep all body parts within the basket at all times, except who? 5,000 pounds - Answer: A fall arrest anchor point must be capable of supporting how many pounds per attached worker? Lower the load if possible. Leave the boom in position and wait for an assist crane to lower it safely unless this presents a new, more significant, hazard. - Answer: What should be done if the boom is struck or damaged during a lift? 10BC - Answer: What is the minimum size and rating for fire extinguishers on mobile cranes? Immediate fatality or within 30 days of the incident - Answer: What constitutes a report to OSHA within 8 hours following a construction accident? Inpatient hospitalization, amputation or eye loss - Answer: What constitutes a report to OSHA within 24 hours following a construction accident?