When there is a need to stop people of doing something, ____ signs are used:

When you need to protect your head, you will use:

When you need to protect your arms from hot surface, you will use:

What document is intended to improve safety onboard?

Which of the following words means to demand an express term in an agreement:

What is chisel?

Which of the following words mean tool which is used for chipping or cutting metal

Choose the documents.