Name: Team: Score:

I. True or false questions (4 points for each question, 40 points in total. Mark "√" correctly and "×" incorrectly.

1, structure hoisting, component turning in place, wire rope binding of hoisting operation should grasp the center of gravity. ( )

2. When installing or disassembling a tower crane with a lifting arm and a balance arm, it is forbidden to disassemble only one of the arms and interrupt the operation. () 3, tower crane jack-up can swing arm. ( )

4, tower crane in operation, in case of more than six levels of wind, heavy rain and lightning, as long as strengthen the monitoring work, you can continue to work. () 5. The tower crane driver should listen to the danger signal from anyone. () 6, hoisting components, no one is allowed to stay under the hanging objects. () 7. Please fasten your seat belt when disassembling, repairing or inspecting the tower crane at high places.

8, when found tower crane subgrade subsidence, tilt, cracks, etc. , should immediately stop using. () 9, tower crane construction in dangerous areas should be equipped with warning lines or warning signs and other obvious warning signs. () 10, if it is really necessary, the tower crane can be refueled for maintenance during operation. ( )

Second, multiple-choice questions (3 points for each question, a total of 60 points)

1. The main parameters of tower crane are _ _ _ _.

A. lifting weight B. nominal lifting torque C. lifting height D. lifting torque 2. Tower crane is mainly composed of _ _ _ _.

A. Foundation, tower body and tower arm B. Foundation, frame body and lifting mechanism

C. metal structure, hoisting mechanism and safety protection device D. metal structure, working mechanism and control system 3. What are the most basic working mechanisms of tower crane? A. hoisting mechanism, luffing mechanism, slewing mechanism and traveling mechanism B. hoisting mechanism, limiting mechanism, slewing mechanism and traveling mechanism C. hoisting mechanism, luffing mechanism, slewing mechanism and self-lifting mechanism D. hoisting mechanism, luffing mechanism, slewing mechanism and self-lifting mechanism

4. The following statements about the main functions of the lifting torque limiter are correct. A. limit the radius of gyration of the tower crane B. prevent the tower crane from being overloaded C. limit the lifting speed of the tower crane D. prevent the tower crane from derailing.

5. For the tower crane with luffing trolley, the lifting moment limiter should be controlled by _ _ _ _ _ _ respectively. A. hoisting capacity and hoisting speed B. hoisting speed and amplitude C. hoisting capacity and hoisting height D. hoisting capacity and amplitude

6. For tower crane with luffing jib, when the minimum distance from the top of hook device to the lower end of jib is 800 mm, _ _ _ shall immediately stop lifting.

A. lifting height limiter B. lifting moment limiter C. lifting weight limiter D. amplitude limiter

7. The demolition of tower crane must be carried out in _ _ _ _.

A. Warm season B. Day C. Sunny day D. Night with good lighting conditions

8. When the lifting capacity exceeds the maximum lifting capacity and is less than 1 10% of the maximum lifting capacity, _ _ _ should stop the tower crane from running in the lifting direction. A. lifting moment limiter B. lifting weight limiter C. amplitude limiter D. travel limiter

9. When the lifting capacity exceeds the maximum lifting capacity and is less than 1 10% of the maximum lifting capacity, the lifting capacity limiter should act to stop the tower crane from running in the direction of _ _ _. A. Up B. Down C. Left and right D. Up and down

10. _ _ _ can prevent the tower crane from being overloaded, and avoid serious accidents such as tower crane overturning or broken arm caused by serious overload. A. torque limiter B. hook safety C. travel limiter D. amplitude limiter 1 1. When the tower crane is working, the wind speed should be lower than _ _. a4 b . 5 c . 6d . 7

12. Which of the following safety devices is used to prevent running cars from exceeding the two extreme positions of maximum or minimum amplitude? A. lifting capacity limiter B. superelevation limiter C. travel limiter D. amplitude limiter

13.____ is located at the head and root of the luffing arm of the trolley, which is used to cut off the circuit of the trolley traction mechanism and prevent the trolley from being offside. A. amplitude limiter B. torque limiter C. trolley travel limiter D. trolley travel limiter

14. The crane with the articulated point at the boom root higher than _ _ _ _ _ shall be equipped with anemometer. 30 meters long, 40 meters wide, 50 meters wide and 60 meters wide.

15. The anemometer shall be installed at the position of _ _ _ from the top of the crane to the spreader. A. intermediate position B. windproof position between the highest positions C. windproof position between the highest positions D. highest position

16._ _ _ It can prevent the wire rope from being stuck and damaged when it leaves the pulley groove during transmission. A. torque limiter B. superelevation limiter C. hook safety device D. wire rope anti-groove device

17.____ is a safety device to prevent lifting wire rope from unhooking due to excessive angle or improper hook. A. torque limiter B. superelevation limiter C. hook safety D. wire rope anti-groove device 18. The disassembly and assembly technology of tower crane shall be approved by _ _ _ _. A. person in charge of the enterprise B. person in charge of the inspection agency C. person in charge of the enterprise technology D. person in charge of the inspection unit

19. When the wind is above _ _ _ _, the tower ceiling lifting operation is not allowed. a4 b . 5 c . 6d . 7

20. The tower crane jack-up operation, must make _ _ _ and balance arm in a state of balance. A. counterweight arm B. lifting arm C. counterweight D. trolley