1. Oxygen sensor detects the concentration of oxygen molecules in exhaust gas (√).
2. Chassis collision will not cause airbag to pop up (×).
3. The additional risk of oil pollution liability is the additional risk of commercial third party liability insurance (×).
4. As long as the front wheel of the car deviates, it is necessary to adjust the four-wheel alignment (×).
5. automotive wiring harness is beyond repair. Once damaged, replace the harness assembly (×).
6. The radiator core is generally made of copper, aluminum and other metals, so the residual value is high (√).
7. For engines with the same number of intake and exhaust valves, the head area of the intake valve is generally larger than that of the exhaust valve (√).
8. In commercial third-party liability insurance, the amount of compensation that the insured should bear is the part of the economic compensation liability that the insured should bear in accordance with the law that exceeds the limit of each sub-item of compulsory insurance, multiplied by the accident liability ratio (√).
9. The chemical name of EPDM is EPDM, which is often used in bumper bumper bumper, body panel and other accessories. This kind of plastic is thermoplastic (√).
10, any parts in the suspension system are not allowed to be repaired by the correction method (×).
1 1, drum brakes have better heat dissipation than disc brakes and are widely used (×).
12. The thermostat is a path valve (√) that controls the coolant flow.
13. The outstanding claims reserve is the fund reserve (√) drawn by the insurance company from the current premium income for outstanding claims that occur or may occur during the insurance validity period.
14, the camshaft is located in the crankcase, that is, the lower camshaft (×)
15, the three-way catalytic converter can only work when the exhaust temperature exceeds 350 degrees Celsius (√).
16. If it is clearly stated in the court judgment or mediation that the compensation for traffic accident losses shall be paid by our company, the target party shall also provide the compensation certificate (√).
17, intercooler (√) must be added to the engine supercharging system.
18, automobile gasoline needs to meet the characteristics of good evaporation and high explosion resistance (×).
19, no matter whether non-motor vehicles or pedestrians intentionally cause self-injury or traffic accidents on the expressway, the vehicle is not at fault, and it shall be borne by the vehicle 10% (×).
20. The rear fender (×) can be replaced without disassembling the rear windshield.
Second, the indefinite choice (2 points for each question, ***30 questions)
1. After reporting the case, the outstanding amount is RMB 2,000, the daily nuclear loss passing amount is RMB 2,500, and the deferred outstanding amount is RMB 8,000. The case is included in the outstanding amount (a).
a、2500 B、2000 C、8000
2, the purpose of air conditioning system vacuum does not include (c).
A, extracting air from the air conditioning system; B, dry air conditioning system; C, removing the sediment in the air conditioning system; D, check the air conditioning system for leaks.
3. The deviation of the outstanding loss reserve of auto insurance at the end of last year is 5%, which is in a state of () (B) A healthy B unhealthy C excellent.
4. Toe refers to the difference between the rear distance and the front distance of two wheels, and also refers to the included angle between the front wheel centerline and the longitudinal centerline. The function of the front toe is B.
A, reduce tire wear; B, automatically aligning the front wheels; C, ensure the driving performance of the car; D, turn gently.
5. The clutch control mechanism generally starts from () and ends at (). C
A release bearing in flywheel housing, clutch torque damper B clutch pedal, clutch driven plate
C clutch pedal, release bearing in flywheel housing D release bearing in flywheel housing, clutch driven plate
6. Wang just bought a second-hand car, the price of which is 6.5438+0.3 million yuan, and the purchase price of a new car is 200,000 yuan, so the insurance amount of Wang's full car damage insurance is (a) 200,000 B 1.5 million C 1.8 million D 1.3 million.
7. If the addressee's whereabouts are unknown, or it cannot be served by other means specified in this section, it shall be served by public announcement. It shall be deemed to have been delivered at the expiration of (d) days from the date of announcement. A one hundred b thirty c ninety d sixty
8. Rainstorm means that the hourly rainfall is greater than () mm, or 12 hours rainfall is greater than () mm, or 24 hours rainfall is greater than () mm .. (d) a10,30,50b/kloc-0,20,30c/kloc-0.
9. At present, Japanese automobile glass certification marks include (A )A, JIS B, R43 C, 3C and DOT.
10, which of the following brands does not belong to General Motors (A) A Skoda B Buick C Opel?
1 1. This part strengthens the strength of the roof and provides a mounting point for the rear door hinge. It's (d).
A, A column B, C column C, D column D, B column
12. In principle, the retail price of the regional market in our system adopts the market price of which accessories? (4)
A, original parts price b, disassembly parts price c, brand parts price d, factory parts price.
13, the main component of the air conditioning system, the main function of the expansion valve is (b)
A. converting low pressure gas into high and low pressure gas B. converting high pressure liquid into low pressure liquid
C, high-pressure gas is converted into high-pressure liquid D, and low-pressure liquid is converted into low-pressure gas through heat absorption.
In 14 and tire size 205/65R 1586H, 65 stands for (b).
A. load index B. aspect ratio of tire section C. tread width D. rim diameter
15, the abbreviation of OBD system is (C)A.ECU B.TSI C.OBD D.AMT.
16, hydraulic coupler and torque converter of hydro-mechanical automatic transmission belong to (), hydraulic coupler belongs to () and torque converter belongs to (b).
A. hydraulic transmission, hydraulic transmission, hydraulic transmission B. hydraulic transmission, hydraulic transmission, hydrostatic transmission C. hydrostatic transmission, hydrostatic transmission D. hydraulic transmission, hydrostatic transmission
17, the general layout of automobile transmission FF, FR, RR, MR refers to (d):
A. Precursor, Precursor, Rear Drive, Full Drive B. Rear Drive, Precursor, Full Drive C. Rear Drive, Rear Drive, Precursor, Full Drive D. Precursor, Precursor, Rear Drive and Middle Drive.
18. The minimum speed specified in the Regulations for the Implementation of the Road Traffic Safety Law shall not be lower than (d) A.50b.80c.70d.60.
19. In the event of an insured accident, the third party shall compensate. If it is really impossible to find a third party, the absolute deductible in (c) shall be implemented. 10% 20% 30% d . 50%
20. Chassis suspension and wiping shall be carried out in the order of (a). A. from front to back. B. From left to right. C. From right to left. D. from back to front.
2 1. In a dispute over compensation for traffic accidents, the party (c).
A. You must seek mediation from the traffic management department of the public security organ. If mediation fails, a civil lawsuit can be brought to the people's court. B. only the people's court can bring a civil lawsuit directly. C you can request the traffic administrative department of the public security organ for mediation, or you can directly bring a civil lawsuit to the people's court. D. you must first ask the traffic management department of the public security organ for a judgment. If the parties think that the judgment is unfair, they can bring a lawsuit to the people's court.
22. The traffic administrative department of the public security organ shall make a traffic accident confirmation within three days from the date of on-site investigation.
A. 5 b. 8 C. 10 D. 12
In any case, the building block itself has many components cast or assembled on it. Chinese is: (1)
A. In any case, the cylinder itself has many parts cast in or attached to the cylinder. In both cases, the cylinder itself has many parts attached to it. In any case, the cylinder itself has many parts cast in it.
24. Fuel filter (a) A. Fuel filter B. Fuel supply system C. Fuel pump D. Fuel tank
25. The radiator core tube can be repaired by (c) A. Repairing B. Tinning C. Welding D. Taking over.
26. The internal duties of the investigation and loss adjuster are: (a) A. Controlling the quality of the claim, B. Evaluating the loss and C. Impairment of the claim.
27. The external responsibilities of surveyors and loss adjusters are: (b) A. Controlling claim quality B. Serving customers C. Claim impairment.
28. The quality of claim control of surveyors and adjusters is as follows: (C)A, accurate loss determination, reasonable loss determination B, rapid loss determination and price verification C, accurate responsibility determination and reasonable loss determination.
29. The company implements a "zero tolerance" system for the problem (a) of surveyors and adjusters.
A, professional ethics B, sense of responsibility C, execution D, team spirit
30. (1) is the most basic requirement of the professional quality of surveyors and adjusters.
A, professional ethics B, sense of responsibility C, execution D, team spirit
(×) The fuel indicator lamp is used to display the amount of oil stored in the vehicle. When the key is turned on, the oil light indicator will light up for a long time when the vehicle is self-checking, indicating that there is enough oil in the vehicle. (×) The battery indicator lamp is used to display the use status of the battery. Open the key. When the vehicle starts the self-inspection, the indicator light will light up, but it will not go out after starting (×). If there is a call from a moving vehicle, you can answer it, but you can't send a text message.
(√) All vehicles must be parked in the parking lot designated by the company during non-working hours, and no one is allowed to leave the official car for the night without authorization. (10) When overtaking the preceding vehicle, you should overtake it quickly and cannot prompt the preceding vehicle. (√) Water temperature indicator is used to display the temperature of coolant in the engine. When the key is turned on, it will light up for a few seconds and then go out. (√) The cleaning liquid indicator light shows the amount of glass cleaning liquid loaded in the car, which is not on at ordinary times, and when it is on, it means that the glass cleaning liquid loaded in the car is insufficient.
(√) Brake disc indicator lamp is used to show the state of vehicle brake wear, and it will light up when the brake disc fails or is excessively worn.
(√) Electronic throttle lights are common in Volkswagen brand vehicles. When the vehicle starts self-test, it will light up for a few seconds and then go out. If it doesn't go out after starting, it means that the mechanical and electronic systems of the vehicle are out of order. (× )ABS indicator light is used to show its working status. When the key is turned on and the vehicle is self-tested, the ABS indicator light will light up for a few seconds and then go out. If it flashes or does not go out after starting, the steering system is faulty. (10) The insurer, the insured and the applicant are all parties to the insurance legal relationship. (10) If an accident occurs in the process of theft or robbery of the insured motor vehicle, the insurance company shall pay the rescue expenses within the liability limit of the compulsory motor vehicle traffic accident liability insurance, and there is no need to recover from the victim. (√) When the prepayment is transferred back, the relevant documents of the hospital transferring to our company shall be provided. (√) The Insurance Law stipulates that if the insurer thinks that the relevant certificates and materials are incomplete according to the contract, it shall promptly notify the applicant, the insured or the beneficiary in writing to supplement them. (√) The establishment of an insurance contract is marked by the offeree's commitment to the insurance offer.
(√) If the insured requests the insurer to directly compensate the third party (victim) in writing, the insurer shall directly compensate the third party (victim) for the compensation due. (X) The applicant applies for insurance with an insurance company before the implementation of the new Insurance Law, and the insurance company underwrites it after the implementation of the new Insurance Law. Therefore, disputes arising from insurance contracts shall be governed by the relevant provisions of the old Insurance Law. (10) Double insurance means that the applicant has concluded insurance contracts with two or more insurers for the same subject matter, the same insurable interest and the same insured accident. (√) Additional oil pollution liability insurance shall be paid with an absolute deductible of 20%. (x) The absolute deductible for each accident applies to all types of insurance. If it is only written in a special agreement and cannot be automatically brought out for calculation by the system, it will be deducted from the arbitration fee. (√) The performance appraisal of personnel engaged in auto insurance survey and damage assessment aims at improving service, quality, productivity and skills. (× 90 days) The auto insurance survey and loss assessment personnel shall be responsible for the security and confidentiality of the user name of their claims system, and the user password shall be properly kept and replaced at least once every 60 days. (ten) the object of application of these Measures is all personnel engaged in on-site investigation, evidence collection, insurance liability judgment, accident investigation, loss verification, compensation scheme negotiation and other auto insurance claims services. (√) The main forms of training and teaching for auto insurance survey and loss assessment personnel are: online teaching, centralized face-to-face teaching and practical training. (×) The training materials are compiled by the auto insurance claims department and the training department of the head office and managed by the training department of the head office. (√) The staffing, recruitment, training, daily management, assessment, promotion, salary management of auto insurance survey and loss assessment personnel shall be implemented with reference to these measures. (10) The recruitment of auto insurance survey and loss assessment personnel should be based on full-time undergraduate education. In principle, it is required that those with full-time undergraduate education or above account for more than 80% of the total number of new recruits. (√) According to the different professional positions of auto insurance survey and loss assessment personnel, set up pre-job, primary, intermediate and advanced training courses at four levels. (√) The personnel who carry out auto insurance survey and damage assessment enjoy other additional benefits besides the social security benefits stipulated by the state and the company, including: a comprehensive security plan higher than other series of employees. (10) The spare parts of automobiles are listed in the spare parts catalogue of corresponding models, but there is no uniform spare parts number. (× 09) 08 Excelle steering link is sold separately. (√) Reiz halogen headlights are sold separately in the lamp housing. (√ )oem brand parts are oem factories with supporting qualifications for automobile production enterprises, and their production and design capabilities exceed the needs of supplying original OEM parts, so they often produce some parts with company product trademarks. (√) The steering gear lever of Buick New Excelle is not sold separately. (x) Information collected for damaged internal accessories includes internal code, part code, vehicle configuration table and color. (ten) the amount of compensation for auto parts accounts for 70% of the compensation for pure car damage. (√) The performance appraisal of personnel engaged in auto insurance survey and damage assessment aims at improving service, quality, productivity and skills. (ten) the object of application of these Measures is all personnel engaged in on-site investigation, evidence collection, insurance liability judgment, accident investigation, loss verification, compensation scheme negotiation and other auto insurance claims services. (√) The training forms of auto insurance survey and loss assessment personnel include: online teaching, centralized face-to-face teaching and practical training. (×) The training materials are compiled by the auto insurance claims department and the training department of the head office and managed by the training department of the head office. (√) The staffing, recruitment, training, daily management, assessment, promotion, salary management of auto insurance survey and loss assessment personnel shall be implemented with reference to these measures. (10) The recruitment of auto insurance survey and loss assessment personnel should be based on full-time undergraduate education. In principle, it is required that those with full-time undergraduate education or above account for more than 80% of the total number of new recruits. (√) According to the different professional positions of auto insurance survey and loss assessment personnel, set up pre-job, primary, intermediate and advanced training courses at four levels. (√) The personnel who carry out auto insurance survey and damage assessment enjoy other additional benefits besides the social security benefits stipulated by the state and the company, including: a comprehensive security plan higher than other series of employees. (√) The function of the transmission system is to transfer the power of the engine to the wheels and make the car run. (√) The driving system can cooperate with the steering system to ensure the handling stability of the vehicle. (×) Steering gear is a mechanism that converts the rotation of steering column into linear reciprocating motion of rack shaft or swing of steering rocker arm, and amplifies steering control force. (√) The tire is between the car body and the ground, and the basic motor performance (×) such as driving, steering, parking, etc. is carried out with the tire size of 205/65R 1586H, and 65 represents the rim diameter. (x) As long as the front wheel of the car deviates, it is necessary to adjust the four-wheel alignment. (x) No component in the suspension system is allowed to be repaired by calibration method. (√) The steel ring material should meet the requirements of rigidity, fatigue resistance, light weight and good heat dissipation. (×) Non-independent suspension has the advantages of simple structure and high cost, but good handling and comfort.
(×) Drum brake has better heat dissipation than disc brake and is widely used. (×) Circulating ball steering gear is the most widely used way in modern automobiles. (√) The three elements of collision force are: size, direction and action point. (×) Wheel alignment parameters: caster angle, caster angle, camber angle, wheel movement angle and wheel toe-in. (√) When using measuring tools to detect parts that may be damaged, the benchmark must be consistent and the same measuring tools and methods must be used. (√) Shanghai Volkswagen Passat B5 car adopts four-bar front independent suspension structure. (×) McPherson independent front suspension system includes: steering knuckle, shock absorber, upper swing arm and lower swing arm. (√) After the collision accident, we need to visually check the damage degree and type of the vehicle along the transmission direction of the collision force. (x) The compressor is easy to be damaged when the car is flooded. (x) Generally, the damaged area is divided into four areas. If the damaged area is in area C, that is, below the waistline, the appearance requirements of painting are also very high. (x) The damaged parts at the four corners of the board are difficult to repair, but the middle is high. (√) In practical work, in order to determine the damage efficiently and quickly, we generally refer to the standard working hours tables of various institutions to verify the paint working hours. (x) The painting cost accounts for 50% of the painter's working hours. (x) The structure of coatings can be divided into solvent-based, water-soluble, powder coatings, light-cured coatings and so on. According to the production scale. (√) In the process of painting touch-up, the coverage area of each process will actually expand. When the radius increases by about 10-30mm (√), the standard operation time is not the actual operation time of a worker according to the standard operation flow, but the average value (√). The paint film structure produced by the whole vehicle is the same as that of the repair operation: both paint and varnish have the characteristics of ×) the hiding power of paint comes from the function of film-forming substances (√) the damaged area should be based on the spraying area of paint (×) the characteristics of thermosetting plastics. If the temperature rises again and burns, it can be recycled. (√) The damage modes of aluminum alloy include scratch, wear, fracture, notch and deformation. (x) The surface of dermis is colored layer, with cortex in the middle and fiber layer below, and the fading of dermis we often see generally refers to the peeling of cortex. (√) Does thermosetting plastic soften or melt with the increase of temperature, and solidify and harden after cooling? This process is reversible and can be repeated many times. (x) Special materials for automobiles are divided into: plastic parts, glass fibers, aluminum alloys, leather and flannel. (√) Thermosetting plastics are mainly used in harsh environments such as heat insulation, wear resistance, insulation and high pressure resistance. (10) The traditional automobile industry materials are mainly steel, accounting for more than 50% of the whole vehicle materials. (X iron is not) Alloys based on aluminum are collectively called aluminum alloys. The main alloying elements are iron, silicon, magnesium, zinc, calcium and manganese. (ten) car lamps scratch, scratch, lamp claw fracture, lamp surface deformation and other damage. (√) Special materials for automobiles are divided into plastic parts, glass fibers, aluminum alloys, leather and flannel. (x) Glass fiber is soft in texture and hard in surface; Touch by hand, the surface is rough, the pressure deformation is small, and it has certain toughness and elasticity. (x) The failure modes of glass fiber are fracture, deformation and notch. (√) Aluminum alloy has low density, but high strength, close to or higher than high-quality steel, good plasticity, and can be processed into various profiles with good electrical conductivity, thermal conductivity and corrosion resistance. (×) Bumper damage modes include deformation, skin explosion, tearing and missing. (√) The damage modes of leather seats are scratches, abrasions and seat airbag pop-up. (√) Thermosetting plastics are mainly used in harsh environments such as heat insulation, wear resistance, insulation and high pressure resistance. (×) The seat airbag pops up and is damaged. During maintenance, the leather surfaces of the airbag and backrest need to be replaced and stitched.
(10) Thermosetting plastic features: it can't be melted again, and its texture is hard. If the temperature rises again and burns, it can be recycled.
(√) Fine grinding is best done with a pneumatic grinder. (×) spot welding is a kind of argon arc welding.
(×) High-strength steel plates have large grains and close arrangement, so they have high strength. (10) Thermosetting materials become soft after repeated heating, but their appearance and chemical composition remain unchanged, and become hard after cooling. It can be welded by plastic machine and heated by solar lamp to repair the deformation. (x) The steel plate is hard and will not deform elastically. (x) Work hardening will occur when baking paint. (√) When using mobile electric welding machine to correct the deep and narrow depressions, it is necessary to use greater efforts to correct (x) The relationship between standard working hours quota and standard working hours is 1 working hours =60 minutes.
(10) Bending deformation is characterized by severe deformation and small radius of curvature, usually bending more than 90 degrees in a very short length.
(×) Non-load-bearing body is mainly used for cars and medium-sized buses. (×) Non-load-bearing body has no independent frame (girder). (√) Metal materials in automobile materials include steel materials and non-ferrous metal materials. (√) The guiding ideology of sheet metal maintenance is to give priority to repair, which can be repaired or not replaced.
104, (√) The principle of repairing and replacing plastic parts is that the damage of thermoplastic parts is mainly repaired, and the damage of thermosetting plastic parts needs to be replaced.
105, (√) The characteristics of plastic deformation and hardening caused by processed steel plates become work hardening.
106 and (x) iron castings are also elastic.
Large area deformation of 107 and (x) aluminum plates can be repaired and corrected by drawing process.
108, (×) Metal and nonmetallic materials can be welded by special maintenance process.
109, (√) Sheet metal parts are cut by cold cutting technology, which has the least damage to the car body.
1 10, (×) The rear fender can be replaced without removing the rear windshield.
Multiple choice questions (please write the answer in front of the question number to facilitate marking)
1 1 1. The high-pressure pipe of air conditioner runs from the compressor to (a) and then to the expansion valve.
A. condenser B. blower C. electromagnetic clutch D. evaporation box
1 12. Treatment of electronic and electrical components in flooding accidents (1) Cleaning and drying.
A. anhydrous alcohol B. gasoline C. mineral water D. distilled water
1 13, deformation damage of machine parts can generally be recovered by (d).
A. rolling B. extrusion C. surface strengthening D. correction
1 14. The function of the spiral coil is to realize (c) the electrical connection with the movable end when turning, that is, it is just a circuit connection wire.
A. moving end B. rolling end C. stationary end D. stopping end
1 15, flooded vehicles can be divided into (c) levels according to their height.
A.4 B .5 C.6 D.7
1 16. Only when the submergence height reaches (c) will the submerged vehicle submerge the battery.
A.2 B.3 C.4 D.5
1 17, the area of color paint is more than (c) times that of the panel, so it is difficult to repair.
a、2/3 B、 1/3 C、 1/2 D、 1/4
1 18, the soil reclamation area will reach about (b) times of the depression area.
a、 1.5 B、2 C、2.5 D、3
1 19. In the structure of the repair paint, the layer above the putty is (D).
A, topcoat B, antirust primer C, galvanized layer D and intermediate primer
120, the paint film structure produced by the whole vehicle is similar to the paint film structure of the repair operation in that both have (d).
A, varnish layer, putty layer B, putty layer and zinc phosphate coating
C, electrophoretic primer coating, zinc phosphate coating D, paint layer and varnish layer.
12 1 There are three layers of pearlescent paints after curing, which layer (b) is mica?
A, lowest layer b, middle layer c and top layer
122, the basic component of automobile paint contains (a)
A, film-forming substances, raw materials, solvents, additives B, film-forming substances, solvents and additives
C, film-forming substances, raw materials D and film-forming substances
123, coating structure can be divided into (a) according to the production scale.
First, the production of automobile paint film structure and the repair operation of paint film structure
B, water-soluble paint film structure and solvent-based paint film structure
124. In the repair work of paint film structure, the top layer of antirust primer is (B).
A, paint b, universal putty c, varnish d and intermediate primer
125. double-process plain paint spraying process (3)
A. spraying once; B, first brush varnish layer, then brush plain paint layer.
C, plain paint layer and varnish layer d are acceptable.
126, three-step pearlescent paint and two-step pearlescent paint have different film-forming substances, but the two-step pearlescent paint contains (a).
A, aluminum flake b, pigment c, mica flake d and film-forming substance
127. The painted area will reach (c) times of the recessed area.
a、2 B、4 C、8 D、3
128. In the actual painting process, the operation item after finishing painting is (c).
A, cleaning B, polishing C, drying D in spray booth, and polishing.
129, the paint film mechanism produced by the whole vehicle has a layer under the primer (b).
A, zinc phosphate coating B, electrophoretic primer C, putty D and color paint
130, indicating that the body structure is applied to large and medium-sized buses and trucks, and some large cars (b).
A, carrier B, non-carrier C, structured body D, whole body
13 1, which of the following is wrong to describe the characteristics of high-strength steel plates? (4)
A, poor high temperature resistance B, good tensile property C, high strength D and good oxidation resistance.
132, the proportion of metal materials in human body mass is (a)
a、72% B、28% C、35% D、65%
133, which body mechanism has the following characteristics: the mass of the whole vehicle increases, the height of the vehicle increases, the technical requirements are high, and the cost is high (b)
A, carrier B, non-carrier C, structured body D, whole body
134, ABS plastic characteristics are (a)
A, thermoplastic B, thermosetting C, normal temperature plasticity D, normal temperature curability
135, and the calculation formula of sheet metal working hours is (b)
First, the cost of working hours = standard working hours × standard working hours quota
B, man-hour cost = man-hour unit price * standard man-hour quota
C, working hours fee = working hours unit price * standard working hours quota+auxiliary materials fee
D, man-hour cost = man-hour unit price * standard man-hour
136, the most widely used body panel is (a)
A high strength steel plate, ABS plastic, C glass parts, D fiber and other synthetic materials.
137, application of thermosetting plastics in vehicles: [A]
A radiator tank b air cleaner housing c bumper d instrument panel
138, characteristics of leather: [A]
A regulating heat, b good hygiene, c environmental protection and d hygroscopicity.
139, the electromechanical collision sensor uses (a) to control the opening and closing of the contact, and the opening and closing of the contact controls the on-off of the ignition circuit of the airbag detonator, thus triggering the ignition circuit.
A. mechanical movement B. switch C. reciprocating movement D. control computer
140, about refrigeration and heating, the following description is wrong (b)
A, gas welding heating fire extinguishing b, infrared lamp heating fire extinguishing c, copper rod heating fire extinguishing d, carbon rod heating fire extinguishing.
E, induction heating and fire extinguishing.
14 1, and the aluminum alloy wheel hub is [a] alloy.
A zinc b silicon c copper d magnesium
142, leather
A has a fiber layer on the surface, a color layer in the middle and a cortex at the bottom.
B has a leather surface, a fiber layer in the middle and a colored layer at the bottom.
C has a color layer on the surface, a cortex in the middle and a fiber layer at the bottom.
D the surface is cortex, the middle is color layer and the bottom is fiber layer.
143, BMW's standard working hours are (a)
A, 5min b,10min c,15min d, 20min.
144, a standard working hour for domestic public is (d)
A, 20 minutes b, 15 minutes c, 30 minutes d, 60 minutes
145, a standard working hour of Guangzhou Honda is (d)
A, 20 minutes b, 15 minutes c, 30 minutes d, 60 minutes