起重机司机试题2（Crane driver test questions 2）.docVIP

起重机司机试题2（Crane driver test questions 2） A RadioButtonList (every day, 0 points, 0 points) 1, the role of lubrication (), sealing, shock absorption. A, transmission power B, reduce wear and tear C, boost power Key points: 1, the correct answer: B 2, the body resistance is a factor affecting the severity of electric shock, in () case, the degree of electric shock is the lightest. A, moist skin B, broken skin C, dry, clean skin D, wearing synthetic clothes Key points: 1, the correct answer: C 3, the following statement is wrong. A, the body can conduct electricity The B and 42 volts are safety voltages C protection earthing is the same as protection against zero D when the current produces a voltage drop in the soil around the site, the voltage between the feet of the person at the point around the site is the step voltage. Key points: 1, the correct answer: C 4, the size of the resistance is irrelevant. A and current B, materials C and length D and cross section Key points: 1, the correct answer: A 5, the main reason for the problem of crane strength is (). A, overload B, shock and vibration C, overload or amplitude Key points: 1, the correct answer: A 6, when found fault, should immediately cut off () power supply. A, brake B, alarm C, interlock D, total Key points: 1, the correct answer: D 7, crane lifting operations, determine the basis for safe lifting weight is (). A and lifting characteristic curve (table) B, safety specification C, practical experience D, operating procedures Key points: 1, the correct answer: A 8, the bridge crane if there are two sets of lifting mechanism, of which is the auxiliary hook. A, heavy lifting B, with smaller weight C, lifting speed is slower Key points: 1, the correct answer: B 9, the driver of the crane into maintenance, can not use wet cloth to wipe (). A, stroke switch B, limiter C, brake D, electrical equipment Key points: 1, the correct answer: D 10. The lifting mechanism of double brakes shall adjust the braking torque indiv