🔍 Key Concepts

• Pedestal cranes used on ships and offshore installations • Common modern power sources for heavy lifting machinery • Basic difference between hydraulic, electric, and internal combustion drive systems

💭 Think About

• Think about which power system is most practical and commonly used on shipboard pedestal cranes today, considering safety, controllability, and available shipboard utilities. • Consider which option would realistically be used for smooth, precise control of heavy loads on deck and offshore platforms. • Ask yourself if it is likely that all three listed power sources are commonly used as the main power on most pedestal cranes, or if one stands out as the standard.

✅ Before You Answer

• Identify which type of power system is typically supplied by a ship’s existing electrical plant. • Consider which system allows transmitting power efficiently through hydraulic oil under pressure to the crane’s motors and cylinders. • Before choosing “All of the above,” verify whether each listed power source is actually common for most pedestal cranes, not just theoretically possible.