Two overload detection methods for overhead cranes are a dynamometer attached to the crane hook or an in-cab computerized digital readout.

Two overload detection methods for overhead cranes are a dynamometer attached to the crane hook or an in-cab computerized digital readout.

• A. True
• B. False
• C. Only dynamometer
• D. Only digital readout

Answer: (A)

Overload detection focuses on sensing the load to prevent exceeding the crane’s rated capacity. A hook-mounted dynamometer measures the tension in the hoist rope, giving a direct reading of the load and allowing the control system to limit or stop lifting if the load is too high. An in-cab computerized digital readout uses sensors and a processor to calculate and display the actual load in the operator’s cab, often with alarms or automatic actions as the limit is approached. Both methods are commonly used to protect the crane and loads, so describing them as the two overload detection methods is correct. Some cranes may use one method, the other, or both, depending on design, but either approach provides overload protection.

Overload detection focuses on sensing the load to prevent exceeding the crane’s rated capacity. A hook-mounted dynamometer measures the tension in the hoist rope, giving a direct reading of the load and allowing the control system to limit or stop lifting if the load is too high. An in-cab computerized digital readout uses sensors and a processor to calculate and display the actual load in the operator’s cab, often with alarms or automatic actions as the limit is approached. Both methods are commonly used to protect the crane and loads, so describing them as the two overload detection methods is correct. Some cranes may use one method, the other, or both, depending on design, but either approach provides overload protection.