初级汽车维修工试题.doc

初级汽车维修工试题（Junior car maintenance questions）Junior car maintenance questions.TxtNational vocational qualification examinationJunior car mechanic problemFirst, choose questions (first questions eightieth questions, choose a correct answer, the corresponding letters into the brackets in the question, 1 points per subject, 80 points)1., professional ethics refers to the people engaged in certain professional work, formed in long-term professional activities.A. behavior specification B. operation procedureC. labor skills, D. thinking habits2., professional ethics can play a role in enterprises.A. determines economic benefits and B. promotes scientific decision-makingC. D. set up the staff awareness and enhance the competitiveness of business3. in the following options, the correct discussion about the relationship between professional ethics and human career success is ().A. professional ethics is an important condition for the success of a persons careerB. people with a high level of professional ethics are sure to succeed in their careersC. people who lack professional ethics are more likely to succeed in their careersWhether D.s career is successful or not has nothing to do with professional ethics4., under the market economy, it is (or) the concept that does not meet the requirements of love and devotion.A. foster professional ideals, B. strengthen professional responsibilitiesC. do one job, love one line, D. more change, more exercise5. the size of the workpiece is the total number of millimeters read by the vernier caliper plus a small value.A. and master foot alignment of the front total cursor x * accuracy valueB. cursor scaleC. precision valueD. cursor scale plus precision valueThe 6. micrometer is a precision measuring tool for measuring workpieces.A. external dimensions B. internal dimensionsC. depth dimension D.Inside and outside dimensions7. needle dial indicator readings for each grid (mm).A. 0.1, B. 0.2, C. 0.5, D. 18. when measuring cylinder wear, the measuring cylinder gauge must be maintained with the center line of the cylinder to ensure accurate reading.A. parallel B. verticalC. tilt D. at any position9. antirust aluminium alloy has ().A., LF5, B., Lyl, C., ZL301, D., LD410. strength refers to the ability of metal materials to resist (external) forces.A. deformation B. shockC. deformation and destruction, D. shock and vibration11. () shall not be used as a tool material.A. grey cast iron B. nodular cast ironC. low carbon steel, D. high carbon steelThe 12. drawing is a technical document which can express () the intention.A. producer B. DesignerC. users, D. visitorsThe left view of the 13. part reflects the parts.A. length and width, B., width and heightC. length and height, D. length, width and heightIn the 14. clearance fit, the relation between the hole and the shaft tolerance band is ().The tolerance zone of the A. hole is above the tolerance band of the shaftThe tolerance zone of the B. hole is below the tolerance band of the shaftThe tolerance zone of the C. axis is above the tolerance zone of the holeThe tolerance zones of the D. holes and the tolerances of the shafts overlap each other15. no matter how the position tolerance reference code direction is, the letter must be filled.A. horizontal, B. verticalC. horizontal or vertical D. arbitrary16. a conductor with a resistance of 2, through which the current is 4A, then the work done by the current in the 1min is () J.A.8 B. 32 C. 480 D. 192017. the Ohms law of the whole circuit is expressed as.A., I=U/R, B., I=E/ (R+r)C., I=U2/R, D., I=E2/ (R+r)18. in a uniform magnetic field, when the flux of a plane is the maximum, the plane is on the magnetic induction line.A. parallel B. vertical C. oblique D. arbitrary position19. a coil with a certain inductance, if the induced electromotive force is large, the current in the coil is indicated.A. values are large and B. varies greatlyC. time is fast, D. change rate is big20. if the inductor L and capacitor C are respectively connected to the DC power supply, while XL and Xc were inductance capacitance ().A., 0 and 0, B., H-infinity and H-infinityC. 0 and H-infinity, D., and 021. the hydraulic brake system on the car belongs to () hydraulic transmission.A. power type B. volumetric type C. pressure type D. volumetric typeThe 22.QFC - 4 dynamometer is for testing engines.A. no load, B. loadC. no load and load D. acceleration load23. the total volume of the cylinder and the volume of the combustion chamber are called compression ratios.A. difference, B. and C. product, D. ratio24. in a working cycle, the crankshaft rotates for 2 weeks, and the piston is reciprocating (or) in the cylinder, called the four stroke engine.A. 1, B. 2, C. 3, D. 4The components of the 25. crank connecting rod mechanism are divided into 3 groups according to their structural features and movement forms, namely, cylinder block, crankcase group, piston connecting rod group and ().A. crankshaft set B. flywheel groupC. crankshaft flywheel group D.Shaft handle setThe function of the 26. crank connecting rod mechanism is to change the force acting on the combustion gas into the torque of the crankshaft, and to output mechanical energy through the crankshaft.A. piston top B. piston pinC. piston ring D. connecting rod27., the function of the car is to transmit the force of the direction between the frame and the wheel and the bending moment and torque produced by it.A. frame, B. axle, C. suspension, D. wheel28. an automotive suspension is an elastic force transfer device between (and) axles.A. frame, B. wheel, C. shock absorber, D. car29. () the role is to maintain the stability of the car in a straight line, and to make the rear wheel automatically back after the turn.A. caster B. kingpin inclinationC. wheel camber D. front wheel toe30. Santana 2000GLI adopts () engine speed sensor.A. photoelectric B. electromagnetic C., Holzer, D., A or B31. Two internal pass of zirconium oxide tube ().A. atmospheric B. exhaust C. intake D. cooling water32., insist on doing justice, and strive to do ().A. B. will separate the publicC. just, fair, D., open the door33. Chinas labor law stipulates that the establishment of labor relations should be made ().A. contract B. labor contractC. notarization, D. agreement34. when the hose on the vacuum gauge is connected to the engine, the instrument () shall be placed.A. horizontal, B. vertical, C. inclined, D. arbitrary35. before the two stage maintenance, the car should be tested, diagnosed and ().A. technical evaluation of B. troubleshootingC.Maintain D. and fill in the records36., the following instruments, () can not detect the gas distribution phase.A. CO - 1A type crankcase gas flow measuring instrumentB. valve timing testerC. dialD. universal test stand for automotive electrical equipment37. the quality guarantee date of the two level of the automobile is within days of the date of the factory.A. 30, B. 10, C. 50, D. 40The combustible gas mixture forming device of the 38. gasoline engine is ().A. carburetor B. gasoline pumpC. combustion chamber D. intake pipe39. () the function is to ensure that the engine in idle or very small load conditions for the provision of less dense mixture.A. main oil supply device B. idle deviceC. concentration device D. acceleration deviceThe 40. () combustion chamber has compact structure, small heat loss and high heat efficiency.A. B. split type precombustion chamberC. swirl chamber type D. unified type41. the majority of automobile engines use () pumps.A. mechanical, centrifugal, B., electricC. gear type D. above, the answer is wrongThe 42. () role is to pressurize the engine cooling water and circulate the cooling water.A. water pump, B. fan, C. radiator, D. thermostat43. Xiali type TJ7100U car equipped with () steering gear.A. recirculating ball B. worm pinC. rack and pinion, D. worm, worm gear44., the braking device of the car is to use () to produce braking effect.A. mechanical friction B. attractionC. fixed D. running in(45.) the function of parking is to ensure reliable, uninduce.A.Drive train B.C. steering system D. brake systemA 46. drum automobile wheel brake is a power train that is extruded (on) the inner side of a brake drum that rotates synchronously with the wheel.A. brake shoe B. return springC. support pin D. brake trachea47. car parking brake (also known as).A. service brake B. hand brakeC. foot brake, D. or more, the answer is incorrect(48.) can make the car stop resides motionless.A. service brake B. foot brakeC. parking brake D. above, the answer is incorrect49. 、 Shanghai Santana car adopts () hydraulic brake transmission device.A. single loop B. dual loopBefore and after C., independent double circuit, D. cross type, double circuit50. the positive temperature coefficient thermistor increases with the temperature.A. invariant, B. fall, C. rise, D. uncertainty51., charging current is too large, will cause () phenomenon.The A. charging indicator is dim and brightB. generator and ignition coil are easy to overheatC. generator internal short circuitD. generator external open circuit52., the individual cylinder of the engine does not work or the ignition time is too early, will lead to ().A. idle flameout, B. idle too highC. unstable idle, D. mixed gas is too thin53., the carburetor float rupture will lead to the fuel supply line ().A. gas mixture is too strong, B. mixture is too thinC. to poor oil, D. idle bad54. turn the ignition switch, the engine crankshaft crank, reverse the phenomenon, this shows that ().A. ignition system ignition premature, B.The ignition system is too lateC. ignition system is out of play, D. voltage is too low55., the ignition of the engine is too late.A. idle running is not smooth, easy flameoutB. mufflers sound heavy, sometimes blasting, carburetor temperedC. turn on the ignition, and the crank engine has an inverted phenomenonWhen the D. accelerates, the engine has a severe knock56., if the generator charging current is too small, it may be () caused.A. regulator is too high, B. electrolyte concentration is too lowC. each connector joint is loose, D. regulator doesnt work57. new friction plate for replacing automobile clutch, the thickness difference of each chip shall not exceed () mm.A. 0.1, B. 0.7, C. 1, D. 0.5The flatness requirements of the transmission housing and cover of 58.EQ1092 type automobile shall not be greater than (mm).A. 0.55, B. 0.25, C. 0.08, D. 0.1059. when the rivet hole of the brake shoe friction plate is drilled, the depth of the rivet hole is the thickness of the friction sheet.A., 1/3, B., 1/4, C., 3/4, D., 2/360. when installing the piston ring of Shanghai Santana JV, the TOP mark on its second compression ring shall be ().A. back piston top, B. toward piston topC. toward the piston skirt, D., toward the piston skirt61. installation of Shanghai Santana LX sedan clutch driven assembly and pressure plate assembly, the alignment of the quasi flywheel on the assembly mark, evenly cross tightened to the specified torque for () N, M.A. 20, B. 25, C. 30, D. 4062. when installing EQ1092 type automobile parking brake,The oil ring is fitted to the flange plate, then the flange plate is pressed onto the second shaft of the transmission, and the flange nut is screwed at () N, M.A. 100150 B. 150200C. 210240 D. 25030063. in the CA1092 automotive recirculating ball steering, each raceway shall be provided with a steel ball.A. 48, B. 36, C. 24, D. 1264. after the first level maintenance, all parts of the car should be free of (abnormal) phenomena.A. sound, B. reaction, C. loose, D. oil pollution65. when replacing the automobile transmission, drive axle and steering gear oil, the supplemental oil level shall be mm of the lower edge of the check hole.A. 020 B. 1520C. 015 D. 202566. the quality guarantee mileage of automobile shall be within the period from the date of manufacture.A. for 1 days, B. for 2 days, C. for 1 months, D. for 6 months67., a repairman said: the low pressure line of the air conditioning system shall be checked in accordance with the order of expansion valve outlet - distilled water - compressor inlet . Repairman B said: should be in accordance with the compressor outlet - condenser - storage tank - compressor inlet in the order of inspection. In the above statement ().A. A is correct, B. B is rightC. A and B are correct, D. A and B are incorrect68. install the EQ1092 type automobile brake camshaft. After installation, check the axial clearance. When the clearance exceeds () mm, the gasket thickness should be adjusted.A. 0.2, B. 0.7, C. 1.8, D. 2Sixty-nineThe main reason for the incomplete clutch separation is ().A. clutch pedal free stroke is too smallB. clutch pedal free travel too largeC. clutch release lever, the inner end of the rod is too lowD. diaphragm spring worn too much70. one of the reasons that cause the clutch to tremble is that.A. pressure plate uneven, uneven spring pressure plateThe B. driven plate is in reverse directionC. clutch free stroke is too smallD. clutch free travel is too large71. the main reason for the clutch slipping is ().A. clutch pedal free travel too largeB. clutch pedal free stroke is too smallC. clutch release lever, the inner end of the rod is too lowD. friction plate is too thick72., the following methods, () for the transmission oil leakage troubleshooting.A. check whether the retaining bolts for the transmission and clutch housing are looseB. check the bearingsC. check that the breather plug is blocked. If it is blocked, clear it upD. will block the ventilation plug73. the three-phase alternator of a car is used to produce a magnetic field.A. rotor assembly B. stator assemblyC. rectifier, D. voltage regulator74. the car generator L terminal is connected with ().A. charging indicator, B. ignition switchC. D. battery ground75. the motor starter is used to connect the circuit between the motor and the battery.A. drive mechanism B. ignition switchC. control device D. one way clutch76. when the ambient temperature is 20V, the resistance of the primary coil of the ignition coil of Santana car is ().A. 0.26 to 0.52 B. 0.26 to 0.52C. 0.520.76 0.520.76 D.77.对四冲程发动机而言, 发动机曲轴与分电器的转速之比为 ().To 12 21 11. B. C. D. 1378.东风eq1090e型汽车装用的dq125型点火线圈为 接柱式 ().To 一 二 http:/www.zalman.co.kr/eng/product/product. B. C. D. 四79.三极管发射结和集电结均处于反向偏置是 状态 ().To 截止. 放大 B.C. 饱和 以上答案都不对 D.80.npn型三极管包含有 个pn结 ().A. 1. B 2 C 3 D 4.二、判断题 (第81题第100题 将判断结果填入括号中.正确的填 错误的填, -, -, 每题1分, 满分20分)81.企业文化对企业具有整合的功能 ().82.员工在职业交往活动中尽力在服饰上突出个性是符合仪表端庄具体要求的