HSE : IQA : Crane

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The Safety Interview Question & Answer

Topic : Crane

1. What is crane?
• A Mechanical equipment used to lift or lower the load.
2. What are types of Crane? Tell me some
• Mobile crane.
• Overhead crane.
• Tower crane.
• Crawler crane.
3. What is anti-two block device?
• A safety advice installed in lifting equipment (crane, side boom, boom truck etc) to prevent the hook/load to touch the sheaves.
• (It prevents the accidental collision of hook with Sheaves (boom).
4. What is Boom Angle Indicator?
• Boom angle indicator is normally mounted on the backside of boom to help operator at what angle the boom is.
5. What is Load chart (Crane)?
• Specifications (documents) provided by manufacturer showing the capabilities of lifting equipment (crane) at specific angle, radius and boom length.
• In fact, load chart shows the actual strength of crane or any other lifting equipment to lift a load at certain angle, distance and length.
6. What is Anemometer?
• Anemometer is a device used for measuring wind speed.
7. What is the radius of crane?
• The area from the center pin of the crane to the center of load.
8. What is the area that need to be barricaded for crane operation?
• Swinging radius.
9. What is SWL?
• Safe Working Load is the maximum working load specified by manufacturer.
10. Does radius affect the capacity of crane?
• Yes, as soon as radius increases, capacity of crane decreases.
11. What is the safe angle for crane?
• 60 degree.
12. What is the minimum acceptable angle for crane?
• 45 degree.
13. What is minimum acceptable angle for sling?
• 30 degree.
14. Who will inspect crane on daily basis?
• Operator.
15. What should be the minimum distance crane need to maintain from power line?
• Crane shall maintaining safe distance from power line during lifting operation.
• Minimum clearance shall be
• Up to 50kv ( 10 feet).
• Over 50 kv 200 kv ( 15 feet).
• Over 200 to 350 kv ( 20 feet).
• Over 350 to 500 kv (25 feet).
• (See 1926.1408 (h) for more information)
16. What is over head goal post or height restriction Goal post used for?
• Overhead cable goal post or height restriction goal post is used to warn vehicles traffic from the danger of overhead cable, power line, low structures on highways, road, sites etc.
• (It shows the maximum overhead clearance distances).
17. You mentioned that lifting operation shall be stopped at 32km/ hr. But what is the possibility if crane operation is in progress at more than 32 km/h?
• If the manufacturer allows to do so, crane operation can be done to the specific wind speed as specified by manufacturer.
18. Give a brief note about crane and LE?
• Only authorized and competent person should operated cranes
• The correct sling must be used for the load to be lifts
• Lifting equipment must be certified from competent authority and mark with its SWL
• Never be used for loads excess of its SWL
• Cables and slings must be padded when passing over sharp edges of equipments
• Check the condition of the ground before parking the crane and use out riggers
• All moving parts must be guarded
• Uncertified chains, ropes, slings and hooks should not be use
• All slings to be inspected by third party inspectors
• Never stand or work under a suspended load
• Place the out riggers on firms ground
• Guide ropes shall be used to control swing of lifted material
• Never operate the crane at the time of speed wing
• Lifting over live equipment should not be encouraged
• The crane should undergo periodical maintenance as per manufactures
19.