Where is the battery installed in a van?

What is a Space Shuttle Bus?

In fact, it is a device that refers to an independently flying space vehicle added to the rocket's basic stage. After the rocket transports the upper stage to a certain orbit, it can fly autonomously and ignite multiple times, directly delivering one or more spacecraft into different orbital spaces. According to CCTV, the upper stage is vividly referred to as a "space shuttle bus." It takes over the rocket's flight in space, starting its journey hundreds of kilometers away from Earth, making it a true "expedition." Introduction to the Space Shuttle Bus: China's first "space shuttle bus," the Long March-3C/Expedition-1, will be used in future deep-space exploration missions such as lunar and Mars exploration. The Long March-3C/Expedition-1 adds an additional stage to the original three-stage Long March-3C rocket, turning it into a four-stage rocket. The main task of the four-stage rocket is to carry satellites that can directly enter orbit. Previously, three-stage rockets could only deliver satellites to a transfer orbit, meaning the orbit launched by the three-stage rocket was elliptical, and the satellite needed to adjust to a circular orbit. The improved four-stage rocket can directly send satellites to more distant target orbits without the need for further orbital adjustments. The flight of a three-stage rocket takes only about half an hour, while the four-stage rocket requires 4 to 6 hours of flight, reaching tens of thousands of kilometers into outer space. Features of the Space Shuttle Bus: It has autonomous orbital maneuverability, long in-orbit flight duration, and can generally ignite multiple times to meet the needs of different launch missions. It can deliver one or multiple payloads (such as satellites, space probes, etc.) to predetermined orbits, much like an airport shuttle bus. It combines the technical characteristics of both a carrier and a spacecraft, being an additional relatively independent stage or stages on the launch vehicle or reusable launch vehicle, capable of continuing flight with its own power to carry spacecraft. It can ignite multiple times. After the launch vehicle delivers it into space, the "space shuttle bus" can ignite multiple times to meet the needs of different launch missions. It has a long operational duration, exceeding that of the launch vehicle, ranging from several hours to several days or even tens of days. The Expedition-1 upper stage is the first to use liquid propellant, with an in-orbit operational time of 6.5 hours. It can sequentially deliver different "passengers" to different destinations. In space, the "space shuttle bus" takes over the rocket's flight mission and can directly deliver one or multiple spacecraft to their work locations through changes in flight trajectory.

14

2

Share

What is the size of a parking space?

According to the "Specifications for Setting On-Street Parking Spaces in Urban Roads," the standard size of a parking space is determined based on the vehicle type. The dimensions for small parking spaces are typically 2.5~2.7 meters in width and 5~6 meters in length. A single-lane turnaround lane should be no less than 3.5 meters wide, while a double-lane should be no less than 5 meters wide. The turnaround section should accommodate a vehicle's one-time turnaround needs. For safety or to accommodate medium and large vehicles, the length is often set to 6 meters or more. Details are as follows: (Length ≤ 6m, width ≤ 1.8m) vehicles: The spacing between vehicles should be no less than 0.5 meters, and the distance between the vehicle and walls or the end of the parking space should also be no less than 0.5 meters. (6m < length ≤ 8m, 1.8m < width ≤ 2.2m) vehicles: The spacing between vehicles should be no less than 0.7 meters. Small vehicle parking space: Length ≥ 5 meters, width 2.2-2.5 meters. Large vehicle parking space: Length 7-10 meters, width 4 meters, depending on the vehicle type. According to the "Code for Design of Parking Garages," the specific dimensions for small car parking spaces in indoor parking garages are as follows: The design dimensions for small cars are 4.8m (length) x 1.8m (width) x 2.0m (height). The minimum size for a small car parking space using a perpendicular parking method should be 5.3m (length) x 2.4m (width), with a minimum access lane width of 5.5m in front of the parking space. The minimum distance between the small car and the side walls should be 0.6m, and the minimum distance to the front and rear walls should be 0.5m. Modern underground parking garages have large floor areas and numerous parking spaces. To ensure free vehicle movement, the area allocated for driveways is relatively large. Driveways, as horizontal passages dedicated to parking spaces, account for the primary floor area allocated to parking spaces and may occupy 50% or more of the total parking space floor area. Parking space arrangements can be categorized into three types: parallel, angled (30°, 45°, 60°), and perpendicular. Large vehicle parking spaces should not use angled or perpendicular arrangements. Details are as follows: Parallel parking space: Standard length is 6 meters, width is 2.5 meters. Angled parking space: Diagonal length should reach 6 meters, width 2.8 meters, with a vertical distance of 2.5 meters between the two diagonal lines. Perpendicular parking space: Length ≥ 5 meters, typically set at 6 meters, width 2.5 meters. The optimal standard size is 2.5m x 5.3m. The "Road Traffic Safety Law" stipulates that on-street parking spaces shall not be set up on roads with a width of less than 6 meters for motor vehicle traffic. Pedestrian crossings, expressways, and main roads are also prohibited from having parking spaces. Within urban road areas, government authorities may designate parking spaces where pedestrian and vehicle traffic is not obstructed. On-street parking spaces should avoid interfering with non-motorized vehicle traffic and must not encroach on non-motorized vehicle lanes. They should not be set up near road intersections, building entrances, or bus stops. Parking regulations, including vehicle types and time limits, should be clearly indicated with signs. Measures should be taken to prevent interference with motor vehicle traffic. Additionally, on-street parking spaces should not be equipped with ground locks to prevent private occupation. Roads where parking is prohibited may have barriers, bollards, or curbs installed. After removal or cancellation of parking spaces, all related signs, markings, and management facilities should be promptly cleared to prevent continued parking and ensure road safety. Furthermore, on-street parking spaces should not be set up within 200m~300m of off-street public parking lots. Quantitative regulations for on-street parking spaces: The "Specifications for Setting On-Street Parking Spaces in Urban Roads" provides quantitative regulations based on road width. For two-way roads, if the actual road width exceeds 12 meters, parking spaces may be set on both sides; if the width is between 12 meters and 8 meters, parking spaces may be set on one side; if less than 8 meters, no parking spaces should be set. For one-way roads, if the actual road width exceeds 9 meters, parking spaces may be set on both sides; if the width is between 9 meters and 6 meters, parking spaces may be set on one side; if less than 6 meters, no parking spaces should be set. Regarding disabled parking spaces, the specifications require that on-street parking spaces should include disabled parking spaces, accounting for no less than 2% of the total. If there are more than 20 parking spaces, at least one disabled parking space should be provided. Parking space marking colors: White: Paid parking spaces; Blue: Free parking spaces; Yellow: Reserved parking spaces; Time-limited parking spaces: Dotted border, line width 10cm; the permitted parking time should be marked inside the border, with numbers 60cm high. Disabled parking spaces: Special markings for disabled parking spaces; yellow grid lines on both sides indicate areas for disabled boarding and alighting, where other vehicles are prohibited from parking. No other vehicles may occupy disabled parking spaces. Special pavement markings should be applied within disabled parking spaces to indicate exclusivity. Yellow grid lines: width 120cm, outer line width 20cm, inner fill line width 0cm, at a 45° angle to the outer line. The outer line length should match the parking space marking length. Requirements for prohibiting on-street parking spaces: Fire lanes, sections with no-parking signs or markings, and construction zones that obstruct traffic; Roads designated for disaster relief and emergency evacuation; Sidewalks, if set, must not encroach on blind paths; Near building entrances; Intersections, railway crossings, sharp curves, narrow roads less than 4m wide, bridges, steep slopes, tunnels, and sections within 50m of these locations; Areas within 30m of bus stops, emergency stations, gas stations, fire hydrants, or fire stations, except for vehicles using these facilities; Sections within 20m of road intersection channelization zones; Areas near underground utility work pits (water, electricity, gas, etc.) and within 15m of these locations; Within 200m of off-street parking lot entrances; Near off-street

8

4

Share

When can I take the Subject 4 exam after passing Subject 3 in the driving test?

There are three scenarios for the Subject 4 exam after passing Subject 3: Take the exam directly in the afternoon of the same day; No appointment required within 9 days: You can take the Subject 4 exam at the designated location within 9 days after passing Subject 3 by presenting your ID card; Appointment after 10 days: The success of the appointment depends on the current number of examinees, the priority of the student, and temporary arrangements at the test center. The driving test consists of three subjects: Subject 1, Subject 2, and Subject 3. Subject 3 is divided into two parts. Subject 4 is the colloquial term for the Subject 3 Safety and Civilized Driving Knowledge Test and is not a separate subject. Subject 4, also known as the Subject 4 Theory Test or Driver Theory Test, is part of the motor vehicle driver's license assessment. It includes requirements for safe and civilized driving operations, knowledge of safe driving under adverse weather and complex road conditions, emergency handling methods for situations such as tire blowouts, and post-accident handling knowledge. Subject 4 Exam Notes: Exam Duration: The exam lasts 45 minutes. Making 12 mistakes (6 questions) during the test will terminate the session. Number of Questions: 50 questions are selected proportionally from the Subject 4 question bank based on the type of license being tested, with each question worth 2 points. Question Types: The questions include single-choice questions (including true/false questions) and multiple-choice questions. The first 45 questions are single-choice, and the last 5 are multiple-choice. The exam also includes animated questions, picture-based questions, scenario recognition questions, and text-based questions. Retake Notes: If you fail Subject 4, you only need to retake Subject 4. The driving school will schedule the retake, and there is no limit to the number of retakes. You can retake until you pass, and no additional fees are required for Subject 4 retakes. Subject 4 Exam Tips: Strengthen weak areas by identifying the reasons for mistakes. For marked questions, don't just memorize the correct answers. Refer to regulations, textbooks, or reference books to understand and digest the reasons for errors. Categorize and summarize questions. Refer to the question bank analysis for classification and identify similar questions: Many questions in the bank are similar and easily confused, so they should be analyzed and summarized. For example, traffic signs for walking, hiking, pedestrian crossing, and pedestrian attention are very similar and easily confused. Group them during study to avoid mistakes. Find memorization techniques: Many questions in the bank involve numbers. Summarizing these numbers can make memorization easier. Subject 1 refers to the Road Traffic Safety Laws, Regulations, and Related Knowledge Test; Subject 2 refers to the Field Driving Skills Test; Subject 3 refers to the Road Driving Skills and Safety and Civilized Driving Knowledge Test. The Safety and Civilized Driving Knowledge Test is conducted after Subject 3.

14

0

Share

What are the symptoms of a broken compressor?

Compressor failure symptoms: 1. Winding short circuit, open circuit, and winding grounding against the casing; 2. Compressor vibration and noise; 3. Incomplete closing of compressor suction and discharge valves; 4. Compressor shaft seizure and cylinder jamming; 5. Thermal protector damage. The compressor is the heart of a car's air conditioning refrigeration system, responsible for compressing and transporting refrigerant vapor. Compressor functions: 1. Compressing air as power; 2. Compressing gases for synthesis and polymerization; 3. Compressing gases for oil hydrotreating; 4. Compressing air for refrigeration and gas separation; 5. Gas transportation after pressurization.

10

4

Share

What is the method for removing the wipers on the Nissan Qashqai?

Nissan Qashqai wiper removal method: 1. Fully raise the wiper arm and adjust the wiper blade angle; 2. Change the angle of the wiper blade to form a 90-degree angle with the wiper arm; 3. Position it at this angle to begin removal - lift the rubber blade, detach the entire wiper blade assembly, spread the rubber blade horizontally, then press down on the main bracket to completely remove the wiper blade assembly. The Nissan Qashqai's exterior dimensions are 4401mm in length, 1837mm in width, and 1593mm in height, with a wheelbase of 2646mm. The front and rear track widths are 1585mm and 1581mm respectively, and the curb weight is 1444kg.

20

0

Share

Which generation is the Honda L15BS engine?

Honda L15BS is the 2nd generation engine. Disadvantages of Honda L15BS: Carbon buildup may occur, and severe cases can lead to engine stalling. Performance of Honda L15BS: Over 110 horsepower at 1200 RPM. Features of Honda L15BS: In addition to improving power output and fuel economy, it also enhances engine warm-up speed. Honda L15BS: The new vehicle is equipped with a 1.5T engine coded L15BS, with a maximum power of 130kW (177 horsepower). For a compact SUV, the power is very strong. Referring to the acceleration level of the previous Civic, this XR-V's 0-100 km/h acceleration time is likely to be under 8 seconds.

10

0

Share

Where is the battery installed in a van?

What is a Space Shuttle Bus?

What is the size of a parking space?

When can I take the Subject 4 exam after passing Subject 3 in the driving test?

What are the symptoms of a broken compressor?

What is the method for removing the wipers on the Nissan Qashqai?

Which generation is the Honda L15BS engine?

What to Pay Attention to When Changing Engine Oil for Cars

Is the BMW 320 a front-wheel drive or rear-wheel drive car?

What to Do If the Car Stalls in Water and Attempts a Second Start?

Should the car's heating system use internal or external air circulation?