There are two types of charging methods: constant current and constant voltage.
Answer: True.
Analysis: There are two most commonly used ways to charge batteries, one is constant current charging and the other is constant voltage charging. The constant current charging current is generally one-tenth of the current of the charging rate of ten hours, and the advantage of this charging method is that the initial current of charging is smaller than the current of the constant voltage charging methodBecause the voltage of constant voltage charging does not change, at the end of charging, because the voltage of the battery rises to about the same as the power supply voltage, the current is very small, and it will not harm the battery like constant current charging.
Compared with battery vehicles, the electrical system of internal combustion vehicles involves more electrical components, so the structure is relatively complex.
Answer: False.
Analysis: For internal combustion field vehicles, the role of the electrical system is mainly used for the starting and lighting of the field vehicle, so fewer electrical components are used and the structure is relatively simple. The vehicle driven by the battery electric motor, the electrical system is the control center and the power source of the vehicle operation, so the electrical components involved are many, and the structure is more complex.
When forklifts forklift goods, the mast should be tilted forward as large as possible to facilitate forklift of goods.
Answer: False.
Analysis: The mast inclination angle refers to the inclination angle of the mast forward or backward relative to its vertical position on the flat and solid ground of the unloaded forklift. The purpose of the rake angle is to facilitate fork picking and unloading of goods;The function of the caster angle is to prevent the goods from slipping off the fork when the forklift is running with the goods.
The lifting height of the forklift is the same regardless of the load capacity.
Answer: False.
Analysis: In order to ensure the stability of the forklift, when the lifting height exceeds 3m, the lifting quality is relatively reduced, and the operator can reduce the lifting height load curve of the forklift or select the lifting weight indicated by the corresponding different lifting heights on the forklift sample.
Forklift stability refers to the ability of a forklift to resist overturning in various working conditions.
Answer: True.
Forklift stability is the ability of a forklift to resist tipping in a variety of conditions, including longitudinal and lateral tipping.
A driver drove a tractor to the wharf, driving at a speed of 50km h on the road with a speed limit of 20km h in the port area, and when he was about to pass through the intersection, he collided with a horizontal forklift, causing a major accident of machine damage. The cause of the accident was the driver
a. Get out of the car with illness.
b. Speeding.
c. Misoperation.
Answer: B Analysis: Driving at a speed of 50km h on a road with a speed limit of 20 km h is a speeding speed, which is an important cause of this accident.
The following is a wrong way to give way.
a. Downhill cars let uphill cars.
b. Forklift let the car.
c. The small car makes the big car.
d. Big carts let small cars.
Answer: D Analysis: The way of giving way stipulates that the small car will let the big car.
It must be done after the vehicle has come to a complete stop so as not to damage the transmission gears.
a. Shift increase. b. Downshifting.
c. Hang into reverse gear.
d. Change gears.
Answer: C Analysis: Engaging reverse gear must be done after the vehicle has come to a complete stop to avoid damaging the transmission gears.
It can prevent the transmission system from being overloaded.
a. Fluid coupling.
b. Hydraulic rheostat.
Answer: A analysis: Hydraulic coupling is a kind of hydraulic transmission device that uses the kinetic energy of the liquid to transmit energy, which uses liquid oil as the working medium to convert the mechanical energy and the kinetic energy of the liquid through the pump wheel and turbine, so as to connect the prime mover and the working machinery to realize the transmission of power. Fluid couplings prevent overloading of the drivetrain.
The role is to prevent the system from being overloaded.
a. Throttle valve.
b. Speed control valve.
c. Diverter valve.
d. Relief valve.
Answer: D Analysis: Safety valves are also known as relief valves. As the name suggests, the safety valve is a key application guarantee to ensure the safety of pressure pipelines and pressure vessels, and the function of the relief valve is to prevent the system from being overloaded.
The function of the forklift speed cap valve is mainly to limit the speed of the forklift to ensure safety.
Answer: False.
Analysis: The function of the forklift speed limiting valve is to limit the speed at which the fork descends to ensure safety.
When the forklift is operating, the forklift may lose stability and roll forward due to the "too far" or overloaded center of gravity of the goods, which generates too much torque on the front wheel bearing point.
Answer: True.
Analysis: As mentioned in the "Forklift Operator Training Course", one of the operations that should be prohibited to avoid tipping is to prohibit eccentric loading of goods.
Li drove a 3T forklift to the warehouse to operate, and immediately took emergency braking because someone suddenly crossed the passage during the drive. In a hurry, the accelerator pedal was pressed as the brake pedal, and the forklift continued to move forward and knocked down the pedestrian, causing serious injuries. The cause of the accident was Li
a. Illegal operation.
b. Speeding.
c. Operation error.
Answer: C Analysis: Mistaking the accelerator pedal for the brake pedal is an operating error.
In general, the greater the compression ratio of the engine, the lower the gasoline grade required.
Answer: False.
Analysis: The compression ratio of the engine is independent of the gasoline grade used.
The manual shift gearbox must disengage the clutch before shifting gears to avoid damage to the gears when shifting.
Answer: True.
The use of unsafe equipment by the driver falls under ( ).
A: The unsafe state of the device.
b: Unsafe behaviour of people
c: Human, object, and environment matching problems.
Correct answer: B
The local special equipment safety supervision and management department at or above the county level referred to in the Special Equipment Safety Law of the People's Republic of China refers to ( ) under the current system
a: Work safety supervision and management department.
b: Market Supervision Department.
c: Department of Transportation
d: Labour Department.
Correct answer: B
When the vehicle is in motion, it is found that there is a car overtaking, in the case of conditions permitting ( ).
A: You must give way to the left.
b: Turn on the left turn signal.
C: Don't deliberately withhold.
D: You can not let it, and accelerate it.
Correct answer: c
When the electrolyte of the battery is insufficient, ( ) should be added
A: Mineral water.
b: Tap water
c: Distilled water of reliable quality.
Correct answer: c
All transmission parts between the power unit and the driving wheels of the field car are collectively called ( ).
a: Brake system
b: Steering system
c: Drive train.
Correct answer: c
For the battery field vehicle, it is the power source and control center of the field vehicle operation, so it involves many components and the structure is more complex than that of the internal combustion field vehicle.
a: Travel system
b: Electrical system
c: Hydraulic system.
Correct answer: B
When multiple forklifts load and unload goods to a truck at the same time, the lateral spacing between the two forklifts is not less than ( ) m.
a: 0.5
b: 0.7
c: 0.9
d: 1.0
Correct answer: d
The meaning of using yellow as a safety color and black as a contrasting color in traffic signs is ( ).
A: Prohibitory signs
b: Indication sign
c: Warning sign.
d: Auxiliary signs.
Correct answer: c
Supervision, inspection and handling of motor vehicle drivers in the enterprise ( ) enterprise safety and technology departments, competent departments and their management personnel.
a: Indirect obedience.
b: Partial obedience
c: Must obey.
Correct answer: c
The Rules for the Administration of the Use of Special Equipment stipulate that the user of special equipment shall formulate operating procedures according to the operating characteristics of the special equipment used. The operating procedures generally include ( ) patrol inspection and abnormal situation handling regulations, as well as corresponding records.
a: Device operating parameters.
b: Operating procedures and methods.
c: Maintenance requirements.
d: Safety precautions.
Correct answer: ABCD
The roads in the field (factory) should always be maintained ( ) and should have good lighting facilities.
A: The road surface is smooth.
b: The roadbed is stable.
c: The slope is neat.
d: Good drainage.
Correct answer: ABCD
The rules for the management of the use of special equipment stipulate that ( special equipment shall not be registered for use.
A: Eliminated by the state.
b: Scrapped.
c: It does not meet the safety performance.
d: Does not meet energy efficiency indicators.
Correct answer: ABCD
Reach trucks generally contain ( ).
a: Drive system.
b: Steering system.
c: Braking system.
d: Working device.
Correct answer: ABCD
The Special Equipment Safety Law of the People's Republic of China stipulates that when special equipment leaves the factory, it should be set up in a conspicuous position of the special equipment ( ) and its description.
A: Product nameplate.
b: Product use requirements
c: Safety warning signs.
d: Product installation requirements.
Correct answer: ac
The relief valve is used in hydraulic transmission to limit the maximum pressure of the pipeline, and its general situation is ( ).
A: Usually the valve is closed.
b: Open only when the liquid pressure exceeds the maximum value.
c: Usually the valve is open.
d: Shut off when the liquid pressure reaches the maximum.
Correct answer: ab
The torque converter in a hydromechanical transmission consists of ( ).
A: Pump wheel.
b: Gears.
c: Turbine.
d: Guide wheels.
Correct answer: ACD
In addition to the technical quality and safety awareness of operators, the main factors affecting the transportation safety of forklift truck companies in the industry also include the following factors ( ).
A: The fuel consumption of the vehicle is high.
b: Poor road working environment.
c: The technical condition of the vehicle is not good.
Correct answer: BC
Normal tires consist of ( ).
A: Inner tube.
b: Outer tire
c: Liner tape.
d: Valve.
Correct answer: ABC
The Special Equipment Safety Law of the People's Republic of China stipulates that ( for special equipment.
A: Special motor vehicles in the field (factory).
b: Boiler.
c: Pressure vessel
d: Pressure pipe.
Correct answer: ABCD