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问题1关于挖掘机陡坡行驶中的驾驶操作叙述如下,请您指出其中哪一项是错误的?1)在约7°—12°以下坡道行驶时,为了防止飞车,爬坡时应使驱动轮处于车体后方,下坡时应使驱动轮处于车体前方。2)爬坡时,最好使回转台处于单向锁止状态。3)下坡时,应尽量使机体重心后移,缩回铲斗柄,或根据现场具体情况,必要时要把动臂卸掉。4)在10°以下坡道下坡行驶时,最好利用发动机制动。5)在17°左右坡道行驶时,由于绕道行驶太费时间,所以最好利用推土机辅助行驶。
Question 1 Regarding the driving operation of the excavator on a steep slope, please describe which one of them is wrong. 1) When driving under a gradient of about 7° to 12°, in order to prevent speeding, you should drive the vehicle when climbing. The wheel is behind the body, and the drive wheel should be in front of the body when going downhill. 2) When climbing a hill, it is best to make the turntable in a one-way lock state. 3) When descending the slope, try to move the center of gravity of the machine backwards and retract the shovel handle, or remove the boom if necessary according to the specific conditions on site. 4) It is best to use engine braking when driving downhill on slopes below 10°. 5) When driving on a ramp of about 17°, it takes time to travel by detour, so it is best to use a bulldozer to assist in driving.