Alstom Transportation Mechanical Supervisor Interview Questions and Answers

Blinding is a technique used in research studies to prevent bias by keeping participants or researchers unaware of certain information.

• Blinding can be single-blind (participants are unaware) or double-blind (both participants and researchers are unaware)

• Blinding helps to reduce bias and ensure the validity of study results

• Example: In a drug trial, participants may be given either the actual drug or a placebo without kn

Permits are legal documents that allow individuals or companies to perform certain activities or projects within a specified timeframe and under specific conditions.

• Permits are required for various activities such as construction, demolition, renovation, and environmental impact assessments.

• They ensure that the work being done complies with local regulations and safety standards.

• Permits may be issued by government agen...read more

Maintenance procedures for heat exchangers involve regular cleaning, inspection, and testing to ensure optimal performance.

• Regularly clean the heat exchanger tubes to remove any buildup of debris or scale

• Inspect the heat exchanger for leaks, corrosion, or other signs of damage

• Test the heat exchanger for efficiency and performance using pressure tests or thermal imaging

• Replace any worn out or damaged parts to prevent fu...read more

Gaskets are mechanical seals used to prevent leakage between two surfaces.

• Types: Spiral Wound, Ring Joint, Camprofile, Double Jacketed, Kammprofile, Rubber, Cork, Metal Jacketed, Non-Asbestos

• Materials: Rubber, Cork, Metal, Non-Asbestos, PTFE, Graphite, Silicone, Neoprene

• Used in various industries like automotive, aerospace, oil & gas, plumbing, etc.

MS stands for Mild Steel and SS stands for Stainless Steel.

• MS (Mild Steel) is a type of carbon steel with low carbon content and is commonly used in construction.

• SS (Stainless Steel) is a type of steel alloy with a minimum of 10.5% chromium content, known for its corrosion resistance.

• SS is often used in kitchen appliances, surgical instruments, and industrial equipment.

• MS is used in structural applications, automotive

Specification of machinery refers to the detailed requirements and characteristics of a machine or equipment.

• Includes dimensions, materials, performance criteria, and safety features

• Should be clearly defined to ensure proper design and functionality

• Examples: maximum load capacity, operating temperature range, power consumption

Gpm for water supply pump can be calculated by dividing the flow rate in gallons by the time in minutes.

• Calculate the flow rate in gallons per minute (GPM)

• Determine the time in minutes over which the flow rate is measured

• Divide the flow rate by the time to get the GPM value

Heat exchangers are devices used to transfer heat between two or more fluids, ensuring efficient heat transfer and temperature control.

• Transfer heat between fluids

• Maintain temperature control

• Increase energy efficiency

• Commonly used in HVAC systems, refrigeration units, and chemical processing plants

A lathe is a machine tool that rotates a workpiece about an axis of rotation to perform various operations such as cutting, sanding, drilling, knurling, or deformation.

• Lathe is used to shape and cut materials such as wood, metal, and plastic.

• It rotates the workpiece on its axis and a cutting tool is applied to the workpiece to remove material.

• Lathe can perform various operations such as turning, facing, drilling, borin...read more

Boiler drum is a cylindrical container which is used to store water and steam produced in a boiler.

• It is a vital component of a boiler system.

• It is usually made of steel and is located at the top of the boiler.

• It acts as a reservoir of water/steam and helps to separate steam from water.

• It also helps to regulate the pressure and temperature of the steam.

• The level of water in the drum is maintained by a feedwater control...read more