Dyal Singh Public School Interview Questions and Answers

I feel that daily production reports are essential for tracking progress, identifying issues, and making informed decisions.

• Daily production reports help track progress towards production goals.

• They provide insights into productivity levels and efficiency.

• They help identify any issues or bottlenecks in the production process.

• Daily production reports assist in making informed decisions for improving processes and meeting targets.

• Regular review of daily production reports can l...read more

There are various types of boilers including fire-tube, water-tube, electric, and biomass boilers.

• Fire-tube boilers: Water is heated inside tubes and hot gases surround them.

• Water-tube boilers: Water flows through tubes that are surrounded by hot gases.

• Electric boilers: Heat is generated using electricity.

• Biomass boilers: Use organic materials like wood chips or pellets to generate heat.

The boiler Air Preheater (APH) system is a heat exchanger used to preheat the combustion air before it enters the boiler to improve efficiency.

• APH system helps in recovering waste heat from the flue gases and transferring it to the combustion air.

• It reduces fuel consumption and increases boiler efficiency.

• Common types of APH systems include tubular, plate, and rotary air preheaters.

• APH systems are essential in industrial boilers to optimize energy usage.

Overall Equipment Effectiveness (OEE) is a formula used to measure the efficiency of a manufacturing process.

• OEE = Availability x Performance x Quality

• Availability = (Operating Time - Downtime) / Operating Time

• Performance = (Ideal Cycle Time x Total Count) / Operating Time

• Quality = Good Count / Total Count

5S is a methodology used to organize a workplace for efficiency and effectiveness by identifying, sorting, setting in order, shining, and sustaining.

• Sort: Remove unnecessary items from the workplace.

• Set in order: Organize remaining items in a logical manner.

• Shine: Clean and inspect the workplace regularly.

• Standardize: Establish procedures and schedules to maintain the first three S's.

• Sustain: Maintain the discipline to continue following the 5S principles.

• Example: Implementin...read more

4M is a method used in manufacturing to categorize the causes of a problem into four main categories.

• 4M stands for Man, Machine, Material, and Method.

• Man refers to the human element involved in the production process.

• Machine refers to the equipment and technology used in production.

• Material refers to the raw materials and components used in production.

• Method refers to the processes and procedures followed in production.

• For example, if there is a quality issue in a product, th...read more

Safety valves commonly used for boilers include spring-loaded safety valves, pilot-operated safety valves, and power-actuated safety valves.

• Spring-loaded safety valves are the most common type used for boilers, operating based on the force of a spring to open the valve at a set pressure.

• Pilot-operated safety valves use a pilot valve to control the opening and closing of the main valve, providing more precise pressure control.

• Power-actuated safety valves are operated by an ext...read more

A mobery valve is a type of valve used in boiler systems to control the flow of steam or water.

• Mobery valves are typically used in boiler systems to regulate the flow of steam or water.

• They are designed to open or close based on the pressure or temperature of the system.

• Mobery valves can help maintain safe and efficient operation of the boiler.

• Examples of mobery valves include float valves and pressure relief valves.