What is the main purpose of train lighting systems?

• Powering the locomotive

• Providing light for passenger coaches

• Controlling train speed

• Operating the air brake system

Answer explanation

The main purpose of train lighting systems is to provide light for passenger coaches, ensuring safety and comfort for passengers during travel, especially at night or in low visibility conditions.

Which of the following is a special requirement of train lighting systems?

• High voltage supply

• Constant brightness regardless of speed

• Overhead power supply

• Series connection of lights

Answer explanation

Train lighting systems must maintain constant brightness regardless of speed to ensure safety and visibility for passengers and crew. This requirement is crucial for effective operation in varying conditions.

In a Single Battery System, the battery is charged by:

• Overhead lines

• Diesel engine

• Axle-driven generator

• Solar panels

Answer explanation

In a Single Battery System, the battery is charged by an axle-driven generator, which converts mechanical energy from the vehicle's movement into electrical energy to recharge the battery.

What is the advantage of the Double Battery Parallel Block System over the single battery system?

• Lower cost

• Less space required

• Better voltage regulation and redundancy

• Uses fewer batteries

Answer explanation

The Double Battery Parallel Block System offers better voltage regulation and redundancy compared to a single battery system, ensuring more reliable power supply and minimizing the risk of total failure.

The Modified Train Lighting System (MTLS) improves performance by:

• Using solar panels

• Replacing DC with AC

• Including a silicon rectifier and better regulation

• Removing batteries completely

Answer explanation

The Modified Train Lighting System (MTLS) enhances performance by including a silicon rectifier and better regulation, which improves efficiency and reliability in power management compared to other options.

In a DC dynamo, the output is regulated by:

• A transformer

• A voltage regulator and carbon brushes

• A diode bridge

• Capacitor bank

Answer explanation

In a DC dynamo, the output is regulated by a voltage regulator, which controls voltage levels, and carbon brushes, which maintain electrical contact with the rotating armature, ensuring efficient operation.

The purpose of a Silicon Blocker Rectifier (SBR) in train lighting is to:

• Amplify voltage

• Invert DC to AC

• Prevent reverse current to the dynamo

• Store electric energy

Answer explanation

The Silicon Blocker Rectifier (SBR) is designed to prevent reverse current to the dynamo, ensuring that the electrical flow remains unidirectional and protecting the dynamo from potential damage.

In End-on Generation (EOG) systems, power is supplied from:

• Each coach individually

• A generator car attached at one end

• Batteries only

• Solar panels

Answer explanation

In End-on Generation (EOG) systems, power is supplied by a generator car attached at one end, which efficiently provides electricity to the entire train, unlike individual coaches or other sources.

Which of the following is a key feature of Head-on Generation (HOG) system?

• Requires separate generator cars

• Uses locomotive alternator to power the entire train

• Batteries are the only source

• No rectifiers are used

Answer explanation

The Head-on Generation (HOG) system utilizes a locomotive alternator to supply power to the entire train, making it efficient. This distinguishes it from other options that suggest separate generators or limited power sources.

Which among the following is not an advantage of Head-on Generation (HOG) over End-on Generation (EOG)?

• Reduced noise

• Decreased carbon emissions

• Increased fuel cost

• No need for generator coaches

Answer explanation

Increased fuel cost is not an advantage of Head-on Generation (HOG) over End-on Generation (EOG). HOG typically offers benefits like reduced noise, decreased carbon emissions, and eliminates the need for generator coaches.