Amoli Organics Project & Maintenance Engineer Interview Questions and Answers

The refrigeration cycle used in a chilling plant is typically the vapor compression cycle.

• The vapor compression cycle involves compressing refrigerant vapor to increase its temperature and pressure.

• The high-pressure vapor then condenses into a liquid, releasing heat.

• The liquid refrigerant then passes through an expansion valve, reducing its pressure and temperature.

• The low-pressure liquid then evaporates, absorbing hea...read more

A vapour compression cycle is a process used in refrigeration systems to remove heat from a space.

• The cycle consists of four main components: a compressor, a condenser, an expansion valve, and an evaporator.

• The compressor takes in low-pressure refrigerant gas and compresses it to high pressure.

• The high-pressure gas then flows to the condenser, where it releases heat and condenses into a high-pressure liquid.

• The liquid ...read more

Preventive maintenance of a reactor involves regular inspection, cleaning, and replacement of parts to ensure safe and efficient operation.

• Regular inspection of reactor components such as valves, pumps, and pipes

• Cleaning of reactor surfaces to prevent buildup of contaminants

• Replacement of worn or damaged parts to prevent equipment failure

• Testing of safety systems to ensure proper function in case of emergency

• Monitoring...read more

Utility and process equipment capacity and make

• Provide details of all utility and process equipment installed in the facility

• Include information on their capacity and make

• Utility equipment may include HVAC, compressed air, water treatment, etc.

• Process equipment may include reactors, distillation columns, pumps, etc.

Air fuel ratio in boiler is the ratio of mass of air to mass of fuel. It is maintained by adjusting the fuel and air flow rates.

• Air fuel ratio is critical for efficient combustion and minimizing emissions.

• The ideal air fuel ratio for a boiler is typically between 1.5 and 2.5.

• To maintain the air fuel ratio, the fuel and air flow rates must be adjusted based on the boiler load and combustion conditions.

• Excess air can lea...read more

Yes, chemical treatment is done in cooling tower to prevent scaling, corrosion and biological growth.

• Chemicals like biocides, scale inhibitors and corrosion inhibitors are added to the water in cooling tower.

• Biocides are used to prevent the growth of bacteria, algae and fungi.

• Scale inhibitors are used to prevent the formation of mineral deposits on the tower walls and heat exchangers.

• Corrosion inhibitors are used to pr...read more

HVAC capacity and motor size are interdependent.

• The HVAC capacity is determined by the size of the space it needs to cool or heat.

• The motor size is determined by the HVAC capacity and the type of system being used.

• For example, a small window AC unit may have a motor size of 1/6 horsepower, while a large central AC unit may have a motor size of 5 horsepower.

• It is important to ensure that the motor size is appropriate fo...read more

Gate valves and ball valves are two common types of valves used in industrial applications.

• Gate valves have a sliding gate that controls the flow of fluid through the valve.

• Ball valves have a rotating ball with a hole in the middle that controls the flow of fluid through the valve.

• Gate valves are typically used for on/off control of fluid flow, while ball valves are used for throttling and control applications.

• Gate val...read more

Yes, I have experience in boiler passing. It involves a thorough inspection of the boiler to ensure its safe and efficient operation.

• Boiler passing involves a visual inspection of the boiler's exterior and interior components.

• The inspection includes checking for leaks, cracks, corrosion, and other signs of wear and tear.

• The boiler's safety controls, valves, and gauges are also checked to ensure they are functioning pro...read more

There are various types, sizes, and names of parts used in mechanical maintenance engineering.

• Types of parts include bearings, gears, belts, valves, and pumps.

• Sizes of parts can range from small screws to large engines.

• Names of parts can vary depending on the specific machine or equipment being maintained.

• Examples of specific parts include ball bearings, spur gears, V-belts, gate valves, and centrifugal pumps.

Material difference refers to the variation in properties and characteristics of different materials used in engineering.

• Materials can differ in their strength, durability, conductivity, and other properties.

• The choice of material depends on the specific application and the desired outcome.

• For example, steel is often used in construction due to its strength and durability, while copper is used in electrical wiring due ...read more