桥式起重机（Bridge crane）.docVIP

桥式起重机（Bridge crane） Test report of safety personnel of hoisting machinery Name: unit: achievement: A choice (please correct answer letters in the brackets, every day 2 points, a total of 20 points) 1, the weight is generally used () to indicate. A, G, B, Q, C, D 2, the reverse deformation of the hook exceeds () 0, should be scrapped. A, 5 B, 10 C, 15 3, pulley groove wall thickness of wear to the original wall thickness (%), pulley scrapped. A, 10 B, 20 C, 30 4. The motor used in the hoist can not be used below the rated value of the supply voltage below%. A, 70 B, 80 C, 90 5 、 master command controller is mainly used for (or) motor or heavy duty and frequent starting occasions (such as grab operation). A, large capacity B, Rao line C, squirrel cage type 6 、 when the crane boom extends, the amplitude varies. A, big B, small C, unchanged 7, elevators, elevator is according to the classification of (). A, according to whether there is no driver B, according to the use of C, according to the mode of operation 8, fishing hook under what circumstances should be scrapped () A, dangerous section wear up to the original size of 5% B, dangerous section wear up to the original size of 10% C, dangerous section wear up to 8% of the original size 9. Prolong the service life of wire rope, lubricate the wire rope periodically, once every (). A, 150 hours B, 160 hours C, 170 hours 10. Cranes operating on rails shall anchor the crane when the work is done. When the wind is greater than () level, the general should stop working. A, class 5, B, class 6, C, class Two, determine the title (the correct tick wrong hit X , every day 2 points, a total of 20 points) 1, fuse can only do short-circuit protection, can not do overload protection. () 2. The motor used in the hoist crane can be used below 90% of the rated voltage of the power supply. () 3, usually crane electrical appliances are good insulation, not leakage. () 4, the hook opening than the original size increased by 15%, the hook