Devices are very easy to manage due to the development of mobile development
Lifting raises the loadto the maximum level
The tower stands at the top of the crane.
Work in pairs. Close your books. Student A draw a tower crane for Student B to label. Student B draw a mobile crane for Student A to label. Check each other's work.
A: A student went out to his booth to operate a tower crane and started working.
B: B student went to the mobile crane and started his work and due to technical errors during the work, the crane lost its position and started to fall down the hill.
A: Student A immediately adjusted his tower craneto help student B, and student B began to pull the mobile crane and bring it to his place.
B: B expressed his gratitude to Student A and said that he would not repeat this work and would always be vigilant during work hours.
12.5 Listen to a description of crane controls and look at A and B. Then complete this text.
Crane operators use different controls to raise and lower the cab, rotate the cab, extend and retract the boom , wind and unwind the load hook and control other equipment. This operator has two joystick one controls left-to-right movement of the boom and the other controls forward and backward movement. The operator uses the foot pedal to retract or extend the boom.
12.6 Listen again and check your answers to 5 Ok very good.
12.7 Read this text about a remote control and label the illustration. Sometimes crane operators use remote controls. In this model there's a stop button on the left. There's a key switch on the right. There are two joysticks in the middle. There are three toggle switches on the top.
a stop button
