高级汽车修理工试卷（Senior auto engineer ）

1、高级汽车修理工试卷3（Senior auto engineer 3）First, multiple-choice questions (first 60 questions). Choose the correct answer and put the corresponding letters into the brackets in the questions. 1 points for each question. 60 points!):1. the value measured by a pressure meter is gas.(A) absolute pressure (B),

2、 pressure (C), vacuum (D), atmospheric pressure;2. in the theory of mixed heating cycle, such as the compression ratio and the total heating quantity, the thermal efficiency is higher if the pressure rise ratio is increased().(A) higher (B), lower (C) constant (D), first higher, then lower3., increa

3、se () can increase the coefficient of inflation.(A) intake end pressure (B), end of air temperature (C), exhaust end pressure (D), exhaust temperature;4. at the end of the intake process, the pressure in the cylinder is always ().(A) greater than atmospheric pressure (B), equal to atmospheric pressu

4、re (C), independent of atmospheric pressure (D), less than atmospheric pressure5. which of the following concentrations makes the combustion more complete and the fuel consumption rate lowest (?).(A) alpha = 0.85 to 0.95 (B), alpha = 1.05 to 1.15 (C), alpha = 1 (D), alpha 0.85 to 0.956. which of the

5、 following mixtures of gases has the fastest burning rate?.(A) alpha =0.85 to 0.95 (B) alpha, =1.05 to 1.15 (C), alpha =1 (D), alpha 0.85 0.957., gasoline engines are prone to detonation combustion.(A) high speed heavy load (B), low speed small load (C), low speed heavy load (D), medium speed and sm

6、all load conditionThe 8. diesel engine combustion chamber is made of various shapes for the purpose of controlling (mainly).(A) the combustion chamber heat dissipation area (B), the proper eddy current and the oil film(C) certain compression ratio (D) temperature and pressure in the combustion chamb

7、er9. () the formation and combustion of mixed gas at the same time has the characteristics of space and oil film combustion, so it is also called compound combustion chamber.(A) open combustion chambers (B), semi split combustion chambers (C), spherical combustion chambers (D), U type combustion cha

8、mbers10. gasoline engine torque reserve coefficient (diesel) torque reserve factor, so it does not need to change the use of low-end, to overcome the potential of resistance(A) less than (B) greater than (C) equal to (D) first, greater than later, less than11., to change the throttle opening, you ca

9、n measure the gasoline engine under the following different load ge=f (n) curve, which (when) the ge=f (n) curve on the minimum Ge value.(A) full load (B), 75% load (C), 50% load (D), 25% load12. the maximum upslope capacity of a car is (.(A) maximum climb (B) of head gear and no load; maximum climb

10、ing grade of direct gear(C) the maximum climbing speed at the top speed of a car (D) when the car is loaded13., when the car is running, such as driving power and driving resistance equal to the car in () state.(A) speeding (B), constant speed (C), slow running (D) speed change;14., if the condition

11、s can be met, the car can run normally.(A) having the largest driving force (B) with smaller running resistance(C) having sufficient engine output power and good adhesion (D) with sufficient ground adhesion15. the maximum power of a car depends on the transmission system.(A) transmission ratio of ma

12、in reducer (B), gear ratio and transmission ratio of main reducer;(C) the direct gear ratio and the main gear ratio (D), the direct gear ratio;16. the direction stability of automobile braking means ().(A) the ability to decelerate rapidly until parking(B) the ability of the car to respond accuratel

13、y to the steering instructions of the pilot(C) the ability of a vehicle to recover from its original motion after disturbance(D) the ability of a car to travel at specified path during braking17., the ground braking force of the car can not exceed ().(A) ground adhesion (B), brake force (C), rolling

14、 resistance (D), and air resistance18. because of a caster, the car straight driving stability increased, B think thats why kingpin inclination, (you think).(A) a pair (B) B, yes (C), a and B are all right (D) a and B are wrong19. the constancy of braking efficiency mainly refers to ().(A) the frict

15、ion coefficient of brake friction pairs is constant (B), and the brake temperature is constant(C) thermal shock resistance of brakes (D), directional stability during braking20. when braking, the brake force of the left and right steering wheels of the car is unequal.(A) deviation (B), vehicle skidd

16、ing (C), vehicle sideslip (D), wheel slip;21., in order to evaluate the fuel economy of a vehicle with different carrying capacity under the same operating conditions, the amount of fuel consumed is used to measure the amount of fuel consumed by the transportation workload.(A) (B) per car per ton ki

17、lometer km (C) by (D) 100 km22., the car in a good level on the road, only by (or) driving, in order to ensure the best economy.(A) maximum speed (B), direct gear critical speed (C), direct gear economic speed (D), sub highest speed23. the maximum slope angle of a car without a rollover is on the ro

18、ad with a certain longitudinal slope.(A) (B) (C) (D);24. lateral stability of a car means.(A) ability to withstand rough and bumpy road (B) resistance to rollover and slip(C) the ability to resist longitudinal and slip (D) resistance to vibration25. the ability of a vehicle to automatically return t

19、o a straight position on a rough road is ensured by ().(A) steering wheel (B) tie rod (C) front wheel alignment (D) shock absorber26., the approach angle and departure angle of the car are the ability to indicate the vehicle approaching and leaving the barrier, the approach angle and the departure a

20、ngle (), and the better the passing of the car.(A) the smaller (B), the greater (C), the constant (D), the appropriate27., cylinder wear, when the roundness reached what value, the engine overhaul ().(A) 0.050 0.063mm (B) 0.063 0.0750mm;(C) 0.175 0.250mm (D) 0.250 0.300mm;Twenty-eightFor transmissio

21、n assembly overhaul repair marks, which of the following is not correct ().(A) transmission bearing bore wear off (B), transmission housing rupture(C) transmission shaft and gear malignant wear (D), transmission bearings have abnormal sound29., for the inspection of the delivery of the car to the fa

22、ctory, the following statement is not correct.(A) the volume of the horn should be sounded (B), without checking the mirror, wiper and other accessories(C) there is no need to check the electrolyte height (D) of the battery. The working efficiency of the generator shall be checked30. which of the fo

23、llowing statements is true of the valve phase?.(A) check before valve clearance (B) shall be checked after adjustment of valve clearance(C) the check of the valve timing during the valve clearance adjustment shall not be affected by the adjustment of the valve clearance. (D)The universal joint forks

24、 at both ends of the 31. transmission shafts are in the same plane.(A) keep the original dynamic balance (B) of the transmission shaft so that the drive shaft is easy to mount(C) to ensure that the transmission shaft equal speed transmission (D), so that the transmission shaft easy to layout32. whic

25、h of the following statements is not correct for the complete vehicle inspection in the completion and acceptance of the motor vehicle?.(A) the height of the cab is about 40 millimeters (B) from the height of the ground, and all the grease nozzles are well assembled and effective(C) the surface of t

26、he spray paint should be free of cracks, peeling and other phenomena (D), and all kinds of lights and signal signs are complete and effectiveAfter the overhaul of the 33. diesel engine, the pressure difference between each cylinder shall not exceed the average value.(A) 3% (B) 4% (C) 5% (D) 6%34. re

27、quirements for braking force balance: the left and right wheels of the rear axle shall not be greater than ().(A) 4% (B) 5% (C) 6% (D) 7%35. which of the following is true of the headlamp tester?.(A) the headlamp tester only detects the luminous intensity of the headlamp(B) the headlamp tester only

28、detects the deflection of the headlamp axis(C) the headlamp tester can detect the luminous intensity of the headlamp and the deflection of the optical axis(D) the headlamp tester can detect the amount of light in the headlamp36. for fuel consumption, which of the following statements is incorrect?.(

29、A) fuel consumption of an automotive engine, usually measured by a volumetric or gravimetric fuel consumption meter(B) balanced bridge type fuel consumption meter consists of bridge circuit, speed meter, flowmeter and ammeter(C) an adjustable resistance arm of a bridge circuit is mounted in the spee

30、dometer(D) balanced bridge type fuel consumption meter is used to determine the mileage per unit volume of fuel consumed by a car37. which of the following statements is true for an automobile brake test rig?.(A) reaction force test table can measure the braking force of automobile wheel(B) the reac

31、tion brake test platform can measure the braking distance of the car(C) reaction test stand is easy to operate, but more complex than inertial test rig(D) the inertia brake test platform can measure the braking force of automobile wheels38., the side force on the ground when the wheel is forward and

32、 backward is ().(A) equal in size, the same in direction (B), equal in size and opposite in direction(C) unequal in size, equal in direction (D), unequal in size and opposite in direction39. which of the following statements is true for a drum test rig?.(A) the drum test stand can only detect the dy

33、namic performance of the car(B) drum test stand can only detect the economy of car(C) drum test platform can detect the power, braking and vibration characteristics of the vehicle(D) the drum test rig can not detect the vibration characteristics of the car40. which of the following statements is inc

34、orrect for cold start injectors?.(A) the cold starting injector is mounted on the intake manifold(B) the cold start injector can be controlled by the ECU(C) the operation of cold starting injector can be controlled by temperature control switch(D) cold starting injectors are mounted on intake manifo

35、lds of cylinders41. an engine with a EFI system. The two signal that determines the basic fuel injection after starting is ().(A) engine temperature and speed signal (B), engine speed and cylinder top dead point signal(C) engine speed and load signal (D), engine load and throttle position signal42.

36、about the brake pressure regulator in ABS, which of the following statements is incorrect?.(A) the cyclic brake pressure regulator directly controls the braking pressure of the wheel cylinder(B) the cycle brake pressure regulator directly controls the oil pressure of the main cylinder(C) the electro

37、magnetic valve of the circulating brake pressure regulator adopts a three position three way solenoid valve(D) cycle brake pressure regulator solenoid valve solenoid controlled by ECU43. which of the following devices does not fall into the form of an automatic transmission?.(A) hydraulic torque con

38、verter (B) planetary gear shift (C) coupling (D) lock clutch44., when the planetary frame in the planetary gear transmission is fixed, the center wheel is used as input, and the inner gear ring is used as the gear corresponding to the output.(A) reverse gear (B), forward gear (C), parking gear (D),

39、direct gear45. about the principle of automobile air conditioning refrigeration, which of the following is incorrect?.(A) the compressor heats up the refrigerant to circulate it in the refrigeration system(B) the condenser turns the gaseous refrigerant into liquid(C) expansion valve prevents the ref

40、rigerant from flowing back after the compressor stops(D) the evaporator turns the gaseous refrigerant into liquid46. which one of the following statements is true about the control of automotive air conditioning?.(A) the overheat switch is mounted close to the inlet of the compressor. It is a temper

41、ature sensing switch(B) a temperature switch is arranged in the refrigeration system, and the temperature inside the carriage can not be arbitrarily set(C) if the system is short of refrigerant, the overheat switch is switched on and the ground circuit is cut off(D) when the ambient temperature is h

42、igh, the ambient temperature switch cuts off the current of the electromagnetic clutch47. which of the following materials is used for the transmission gear?.(A) 45 (B) 65 manganese steel (C) 18 (D) 60 titanium chromium manganese steel48. which of the following materials is used to make a transmissi

43、on housing?.(B) 40 chromium (B) A3 steel (C), B3 steel (D) grey iron49. which one of the following statements is not true about the assembly relationship between automobile chassis parts?.(A) the half axle is connected with the hub by a bolt (B), and the half shaft is connected with the semi axle ge

44、ar(C) a bolt connection (D) between the wheel hub and the wheel plate; a key link between the drive shaft and the main reducer50. which of the following statements is not true about the CA1091 type automobile circuit?.(A) the cab light of this model is not controlled by DC contactor(B) the temporary

45、 parking stop light of this model is not controlled by DC contactor(C) the work light socket of this model is controlled by DC contactor(D) the model uses a combination relay consisting of a starting relay and a charging indicating control relay51. which of the following statements is not true about

46、 the EQ1090 type automobile circuit?.(A) the negative pole of the battery is connected to the power switch (B), and the exciting current of the generator is controlled by the ignition switch(C) the starter relay is controlled by the ignition switch (D), and the initial current flows through the amme

47、ter52. which of the following is true about exhaust gas recirculation systems?.(A) the system was adopted to reduce CO emissions(B) the system was adopted to reduce HC emissions(C) the system was adopted to reduce emissions of CO and HC(D) the system was adopted to reduce NOX emissions53. which of t

48、he following measures does not reduce fuel consumption?.(A) to improve the power of low speed vehicles (B) to reduce vehicle kerb mass(C) minimize the rolling resistance of vehicles by using small tonnage vehicles (D) as much as possible54. which angle has the biggest impact on engine oil saving?.(A

49、) intake advance angle (B), air inlet lag angle (C), exhaust lag angle (D), and valve overlap angle55. as regards the parameters of the modified vehicle, the maximum height of the goods in the loading state shall not be higher than ().(A) 3 meters (B), 3.5 (C), 4 meters (D), 4.5 meters56. which of t

50、he following statements is incorrect about the requirements that vehicle equipment should meet?.(A) the regular equipment of the vehicle shall comply with the provisions of the JT3111-85 technical conditions for motor vehicle operation safety(B) vehicles should be equipped with temporary equipment w

51、hen they are used under special operating conditions(C) all kinds of accessories, meters, spare wheel and so on, which are equipped with the original factory, must be guaranteed complete and intact(D) the vehicle equipment for the transport of dangerous goods shall comply with the provisions of the

52、JT3130-88 rules on the transport of dangerous goods by automobiles57. what kind of vehicle does the vehicle after the last two stage maintenance?.(A) a complete car (B) two basic end car (C) three (D) to repair four suspended car58. which of the following is not a technical and economic quota for mo

53、tor vehicles?.(A) the intact rate (B) correction of frequency (C) tire retreading rate (D) depreciation fund59. which one of the following statements is not true about vehicle inspection and diagnosis?.(A) the automobile comprehensive performance testing station is responsible for the identification

54、 of vehicle modifications(B) detection and diagnosis technology is the guarantee of visual maintenance(C) the identified vehicle comprehensive performance testing station is responsible for the identification of automotive research projects(D) the Department of Communications (bureaus) of the provin

55、ces, autonomous regions and municipalities directly under the central government is the competent department of the automobile comprehensive performance testing stationSixtyWhere should the tire transposition be maintained?.(A) routine maintenance (B), first level maintenance (C), two level maintena

56、nce (D), three level maintenanceScoreRatersTwo, judgment questions (sixty-first 80 questions). Fill the parentheses with the result of the judgment. Fill in the V right and wrong fill *. 1 points for each question. 20 points!):(61.) the ventilation process of the engine consists of the whole process

57、 from opening the exhaust valve to closing the intake valve.(62.) analysis of the fuel adjustment characteristic of the purpose is to understand the effects of mixture components on the engines power and economy, to determine the optimum mixture composition, section size of main needle position or adjust the carburetor of the main hole.(63.) a good steering vehicle with neutral steering.(64.) if the frame assembly does not