Mobility & Transport Technology
🎯 PYQs — Mobility Tech (High Frequency)
Most Asked Topics:
- EV types (BEV, HEV, FCEV)
- ADAS (Advanced Driver Assistance Systems) & Autonomous vehicle levels
- Drone rules and categories in India
- Fuel Cell technology (Hydrogen)
Common Traps:
- ❌ HEVs (Hybrid) do NOT need to be plugged in (they self-charge via engine/braking)
- ❌ FCEVs (Fuel Cell) emit water vapor, NOT CO2
- ❌ Nano drones (<250g) do NOT require pilot licenses in India
1. Electric & Fuel Cell Vehicles
EV Subsystems & Battery Chemistry
| What is the role of the Battery Management System (BMS) in an EV? | - Battery Management System (BMS): The "brain" of the battery pack that monitors cell parameters such as voltage, temperature, and State of Charge (SOC). It ensures overall safety and manages cell balancing. |
| Compare LFP and NMC cathodes in Lithium-Ion batteries. | Cathode Chemistry (Positive Electrode): The primary determinant of battery energy density. - LFP (Lithium Iron Phosphate): Offers higher thermal safety, longer cycle life, and lower cost, but has a lower energy density. - NMC (Nickel Manganese Cobalt): Offers higher energy density but has a shorter cycle life and is more expensive. |
| Detail the roles of the Anode, Electrolyte, and Separator. | Other Key Battery Components: - Anode (Negative Electrode): Typically made of Graphite, which stores lithium ions during charging through the process of intercalation. - Electrolyte: The conductive chemical medium that facilitates the transport of lithium ions between electrodes. - Separator: A physical barrier that prevents direct contact and short-circuiting between the anode and cathode while allowing ions to pass through. |
| Explain Solid-State Batteries and their advantages over traditional Lithium-Ion batteries. | - Solid-State Batteries: Battery technology that uses a solid electrolyte instead of liquid or gel. Advantages include significantly higher energy density and improved safety (completely non-flammable). |
FCEV (Fuel Cell Technology)
| Explain the chemical mechanism of a Hydrogen Fuel Cell. | - Mechanism: Hydrogen ($H_2$) combines with atmospheric Oxygen ($O_2$) to produce electricity, heat, and water ($H_2O$) as the only byproduct: $$H_2 + O_2 \rightarrow \text{Electricity} + \text{Heat} + \text{Water}$$ |
| Describe the roles of the Proton Exchange Membrane (PEM) and Platinum Catalyst in a Fuel Cell Stack. | Fuel Cell Stack: - PEM (Proton Exchange Membrane): Serves as the solid electrolyte; allows only positively charged protons to pass through while blocking electrons. - Platinum Catalyst: Speeds up the splitting of hydrogen molecules at the anode and the formation of water at the cathode. |
| How is hydrogen stored onboard FCEVs? | - Hydrogen Storage: Stored in lightweight, high-pressure tanks (usually 350 to 700 bar) constructed from carbon fiber and composite materials. |
| Why are FCEVs preferred over BEVs (Battery EVs) for heavy-duty and long-haul transport? | - FCEV vs BEV: FCEVs are more suited for heavy-duty and long-haul applications (like buses and freight trucks) due to their faster refueling times and higher energy density by weight compared to heavy battery packs in BEVs. |
India's Mobility Policy & Schemes
| What is the PM E-DRIVE scheme? Detail its budget, what it replaces, and its core focus. | - PM E-DRIVE: Replaced the FAME-II scheme in September 2024 with a budget of ₹10,900 Crore. It supports electric 2-wheelers and 3-wheelers, public transit (e-buses), charging station infrastructure, and localization of supply chains. |
| What is EMPS 2024? | - EMPS 2024 (Electric Mobility Promotion Scheme): Served as a bridge scheme between FAME-II and PM E-DRIVE to maintain EV subsidies for 2-wheelers and 3-wheelers. |
| Explain the PLI-ACC scheme. | - PLI-ACC: Production Linked Incentive for Advanced Chemistry Cell storage (targeting 50 GWh capacity) to promote domestic manufacturing of advanced battery cells. |
| What is PM-eBus Sewa? | - PM-eBus Sewa: A national scheme aimed at deploying 10,000 electric buses across 169 cities. |
| What is the Electric Mobility Index (IEMI) and which states lead? | - IEMI (India Electric Mobility Index): Developed by NITI Aayog to benchmark and rank Indian states on their transition to transport electrification. Delhi and Maharashtra are the leading states. |
| What is Vehicle-to-Grid (V2G) technology? Mention any pilot project in India. | - Vehicle-to-Grid (V2G): Technology that enables EV batteries to not only draw power from the grid but also feed power back into the grid during peak demand to stabilize it. A pilot project is being run by Kerala State Electricity Board (KSEB) in collaboration with IIT Bombay. |
2. Autonomous Driving & Rail Tech
Levels of Automation (SAE J3016)
| Detail Levels 0, 1, and 2 of vehicle automation. | Automation Levels (SAE): - Level 0 (No Automation): Human driver controls steering, throttle, and braking completely. - Level 1 (Driver Assistance): Vehicle performs one automated function (e.g., standard cruise control) while the driver controls the rest. - Level 2 (Partial Automation): Vehicle controls steering and acceleration/deceleration simultaneously (e.g., Tesla Autopilot), but the driver must keep hands on the wheel and monitor the environment. |
| Detail Levels 3, 4, and 5 of vehicle automation. | Automation Levels (SAE Contd.): - Level 3 (Conditional Automation - 'Eyes-off'): Vehicle handles all driving tasks under specific conditions. The driver can look away but must remain alert and ready to take control when prompted. - Level 4 (High Automation - 'Mind-off'): Vehicle operates completely driverless within designated geofenced areas or under specific weather conditions. No driver intervention is required in these zones. - Level 5 (Full Automation - 'Driverless'): Fully autonomous vehicle that can navigate any road, weather, or traffic condition without any human interface. |
ADAS Integration
| Define ADAS and state the hardware sensor suite involved. | - ADAS (Advanced Driver Assistance Systems): Active safety systems designed to reduce driver error. They integrate camera feeds, radar, LiDAR, and ultrasonic sensors processed by an onboard Electronic Control Unit (ECU). |
| Describe Adaptive Cruise Control (ACC) and Automatic Emergency Braking (AEB). | Key Safety Features: - Adaptive Cruise Control (ACC): Automatically adjusts the vehicle's speed to maintain a set safety distance from the vehicle ahead. - Automatic Emergency Braking (AEB): Detects potential imminent forward collisions and automatically applies brakes if the driver fails to respond. |
| How does the ANPR-FASTag highway tolling system function? | - ANPR-FASTag: A barrier-less tolling system that combines Automatic Number Plate Recognition (ANPR) cameras with RFID technology (FASTag) to process payments without requiring vehicles to stop. |
| What is the regulatory outlook for ADAS in India? | - Regulatory Outlook: The Union government is considering making basic ADAS features mandatory for all new heavy commercial vehicles and school buses to lower highway accident rates. |
Advanced Rail Technologies
| What is Kavach 5.0? Explain its components and operation. | - Kavach 5.0: India's indigenous Automatic Train Protection (ATP) system. It utilizes track-side RFID tags, signal transmitters, and onboard sensors. It prevents collisions by automatically applying train brakes if the pilot overshoots a red signal or if another train is detected on the same track. |
| Explain the concept of Hyperloop Mobility and India's pilot project. | - Hyperloop Mobility: An ultra-high-speed transport system where aerodynamically designed pods travel through low-pressure steel tubes using magnetic levitation and Linear Induction Motors (LIM) to minimize drag. Maharashtra has partnered with TuTr Hyperloop (an IIT Madras spin-off) to build a prototype cargo hyperloop corridor. |
| Detail Shinkansen Bullet Train technology and its Indian implementation. | - Shinkansen (Bullet Train): Japanese high-speed rail technology featuring dedicated grade-separated tracks (no level crossings) and Automatic Train Control (ATC). It is being implemented on India's first high-speed rail corridor between Mumbai and Ahmedabad. |
3. Drone Technology & Regulation
Classification in India (Drone Rules 2021)
| Detail the weight ranges and licensing requirements for Nano and Micro drones in India. | Drone Categories (Drone Rules 2021): - Nano Drones: Weighing less than 250 grams. No Remote Pilot License or flight permission required. - Micro Drones: Weighing 250 grams to 2 kilograms. Requires pilot registration and license only for commercial operations. |
| Detail the weight ranges and licensing requirements for Small, Medium, and Large drones in India. | Drone Categories (Contd.): - Small Drones: Weighing 2 kg to 25 kg. Remote Pilot License is mandatory. - Medium Drones: Weighing 25 kg to 150 kg. Remote Pilot License is mandatory. - Large Drones: Weighing more than 150 kg. Remote Pilot License and airworthiness certificates are mandatory. |
Regulations & Drone Ecosystem
| What is the Digital Sky Platform? | - Digital Sky Platform: A single-window, interactive online portal hosted by the Directorate General of Civil Aviation (DGCA) for drone registrations, pilot licensing, and airspace clearances. |
| Detail the three Airspace Zones under Drone Rules 2021. | Airspace Zonation: - Green Zone: Airspace up to a height of 400 feet; no flight permission required for licensed operations. - Yellow Zone: Controlled airspace (e.g., buffer zones around airports); requires active Air Traffic Control (ATC) clearance. - Red Zone: Prohibited airspace (e.g., near borders, military bases, VIP areas); flights are strictly banned. |
| Explain the Drone Shakti initiative and its target applications. | - Drone Shakti: A Union government initiative promoting "Drones as a Service" (DrAAS). It supports applications like precision agriculture (liquid fertilizer/pesticide spraying), healthcare logistics (delivering vaccines/blood to remote areas), and general logistics. |