Logo
Select Quick Pages:
Home
About
Contact Us
Disclaimer
Privacy policies
Terms and conditions

Electric Traction

1 - 10 of 48

Steam Engine provided on steam locomotives is

Discuss
  • Steam Engines provided on steam locomotives is a double-acting non-condensing type.
  • This means that steam is admitted to both sides of the piston alternately, which produces a reciprocating motion that drives the locomotive's wheels.
  • In a non-condensing engine, the steam that has been used to power the piston is exhausted into the atmosphere rather than being condensed and reused.
  • This type of engine is also sometimes called a "high-pressure" engine because it operates with high-pressure steam.
  • The double-acting design means that the engine produces power in both directions of piston travel, which helps to smooth out the motion of the locomotive and make it more efficient.
  • This contrasts with a single-acting engine, which only produces power on one side of the piston.

The overall efficiency of the steam locomotive system is close to

Discuss
  • The overall efficiency of the steam locomotive system is close to 5 to 10%.
  • This means that only a small percentage of the energy from the fuel is actually converted into useful work, such as moving the locomotive and its cars.
  • There are several reasons why steam locomotives are relatively inefficient.
  • First, a significant amount of energy is lost as heat during the combustion of the fuel in the locomotive's firebox.
  • Second, the steam engine itself is not very efficient at converting the thermal energy in the steam into mechanical energy.
  • Finally, a significant amount of energy is lost due to friction between the moving parts of the locomotive.

High-pressure locomotive work at the steam pressure of

Discuss
  • High-pressure locomotives, also known as superheated steam locomotives, operate at steam pressures of around 20-30 kg/cm2 (or approximately 284-427 psi).
  • This is significantly higher than the steam pressures used in older, conventional locomotives, which typically operated at pressures of around 10-12 kg/cm2 (142-170 psi).
  • The higher steam pressure used in high-pressure locomotives allowed for increased power output and improved efficiency.
  • The steam was also superheated, which further increased the efficiency of the locomotive by preventing condensation and improving the heat transfer to the pistons.

In a steam locomotive, electric power is provided through

Discuss
  • In a steam locomotive, electric power is typically generated by a small turbo-generator that is driven by steam from the locomotive's boiler.
  • The turbo-generator consists of a turbine that is connected to an electrical generator.
  • When the steam from the boiler is directed through the turbine, it causes the turbine to spin, which in turn drives the generator to produce electric power.
  • The electric power produced by the turbo-generator is used to power various electrical systems on the locomotive, such as lights, motors, and control systems.

The maximum horsepower of a steam locomotive is

Discuss
  • The maximum horsepower of a steam locomotive is 1500.
  • The maximum horsepower of a steam locomotive can vary depending on the specific locomotive model, but 1500 horsepower would be considered relatively low for a steam locomotive.
  • In fact, some of the most powerful steam locomotives ever built, such as the Union Pacific Big Boy and the Norfolk and Western Y6b, had a maximum horsepower output of around 6000 to 7000 horsepower.
  • There were many steam locomotives built with lower horsepower ratings, particularly in the earlier years of steam locomotive development.
  • For example, some early steam locomotives built in the mid-1800s had horsepower ratings in the range of just a few hundred horsepowers.
  • As locomotive technology advanced, however, steam locomotives became more powerful, and many were built with horsepower ratings in the thousands.
  • So, while it's possible that there were some steam locomotives with a maximum horsepower of 1500, it would not be considered a particularly high horsepower rating for a steam locomotive.

The advantage of electric traction over other methods is

Discuss
  • The advantage of electric traction over other methods is no pollution problems, faster acceleration, and better braking action.
  • Electric traction has several advantages over other forms of locomotion, including steam and diesel locomotives.
  • One of the main advantages of electric traction is that it produces no direct pollution, as electric locomotives do not produce any emissions or exhaust. This makes electric traction an environmentally friendly option for transportation.
  • Electric locomotives also typically have faster acceleration than other types of locomotives, as they can deliver full torque from a standstill. This makes electric locomotives well-suited for high-speed rail applications, where rapid acceleration and deceleration are important.
  • Electric locomotives also typically have better-braking action than other types of locomotives, as they can use regenerative braking to capture energy during deceleration and use it to power the train. This not only improves the train's efficiency but also reduces wear and tear on the braking system.

The range of horsepower for diesel locomotives is

Discuss
  • The range of horsepower for diesel locomotives is 4000 to 5500.
  • For example, some of the most powerful diesel locomotives in use today, such as the General Electric AC6000CW and the EMD SD90MAC-H, are capable of producing over 6000 horsepower.
  • That being said, there are certainly diesel locomotives in use today with horsepower ratings in the range of 1500 to 2500, particularly in lighter-duty applications such as yard switching or short-haul freight service.
  • In general, the horsepower rating of a diesel locomotive will be determined by the requirements of the specific application, with heavier-duty applications requiring more powerful locomotives.

The efficiency of diesel locomotives is nearly

Discuss
  • The efficiency of diesel locomotives is nearly 26 - 30 percent.
  • It means that only about a quarter to a third of the energy contained in diesel fuel is actually converted into useful work to move the train. The rest of the energy is lost as waste heat, exhaust gases, and other forms of inefficiency.
  • This level of efficiency is relatively low compared to other forms of transportation, such as electric trains can achieve much higher efficiencies by using electric motors powered by high-efficiency power plants.
  • Diesel locomotives are still widely used in the transportation industry because of their flexibility and ability to operate in a wide variety of conditions.
  • In recent years, efforts have been made to improve the efficiency of diesel locomotives through the use of technologies such as hybrid power systems, regenerative braking, and improved engine designs.
  • These efforts have resulted in some modest improvements in efficiency, but there is still significant room for improvement.

The overload capacity of diesel engines is usually restricted to

Discuss
  • The overload capacity of diesel engines is usually restricted to 10%.
  • The overload capacity of a diesel engine depends on various factors, such as the engine's design, intended use, and manufacturer's specifications.
  • In general, diesel engines are designed to handle short periods of increased load, which is typically between 10-20% above the rated capacity of the engine.
  • The overload capacity of a diesel engine is limited because running an engine beyond its rated capacity for extended periods of time can cause overheating, premature wear and tear, and other damage.
  • Exceeding the overload capacity can also result in a decrease in fuel efficiency, higher emissions, and increased maintenance costs.
  • It's important to note that the overload capacity of a diesel engine should only be used in emergency situations or when absolutely necessary.

Suburban railways use

Discuss
  • Suburban railways use 750V DC.
  • Suburban railways, which typically operate within urban or suburban areas and provide commuter service, require an efficient and reliable source of electrical power to run their trains.
  • Direct current (DC) has several advantages over alternating current (AC) for railway power systems, including simpler equipment design, lower maintenance costs, and better speed control.
  • The specific voltage used by a suburban railway's electrical power system can vary depending on several factors, such as the type of train, the track configuration, and the operating environment.
  • A voltage of 750V DC is a common standard for suburban railways in many parts of the world.

Related category

Industrial Engineering
Strength of Materials
Crystallography Defects
Manufacturing Engineering
Iron Carbon Diagram
Heat Mass Transfer
Power Plant Engineering
Refrigeration MCQ
Synchronous Motor
DC Generator
Measurement & Instrumentation
Illumination
Switchgear and Protection
Power electronics
Induction Motor
Power System
RL Circuit
Cables and Connector
Control System
BLDC Motor
Magnetism and Electromagnetism
PMDC Motor
Biomedical Instrumentation
Feeler Gauges
Radius Gauges
Function of pattern
Pattern Materials
Angle Gauges
Engineering Metrology
1 - 10 of 48