10+ Multi Recruit Interview Questions and Answers

The temperature of cooling tower water can vary depending on the specific system and operating conditions.

• Cooling tower water temperature typically ranges from 70-85 degrees Fahrenheit.

• The temperature may be controlled by adjusting the flow rate of water through the tower or by adding chemicals to the water.

• Monitoring and maintaining the proper water temperature is important for the efficiency and effectiveness of the cooling system.

The permissible vacuum drop for reactor vacuum testing depends on various factors such as the type of reactor and its design specifications.

• The permissible vacuum drop can vary depending on the type of reactor being tested.

• For some reactors, a vacuum drop of 5-10% may be considered acceptable.

• In other cases, a vacuum drop of less than 2% may be required.

• The specific permissible vacuum drop should be determined based on the reactor's design specifications and industry standard...read more

The temperature of cooling tower water varies depending on the specific system and operating conditions.

• The temperature of cooling tower water is typically maintained within a specific range to ensure efficient cooling.

• Factors such as ambient temperature, heat load, and water flow rate can influence the cooling tower water temperature.

• Cooling tower water temperature can be measured using temperature sensors or thermometers.

• The temperature of cooling tower water may need to be...read more

Vacuum drop should be minimal, typically less than 2 inches of mercury.

• Vacuum drop should be monitored regularly to ensure efficient operation.

• Excessive vacuum drop can indicate leaks or issues with the system.

• Typically, a vacuum drop of less than 2 inches of mercury is considered permissible.

• Consult manufacturer guidelines for specific acceptable vacuum drop limits.

Alum and chlorine are used in water treatment to remove impurities and kill harmful bacteria.

• Alum is used to coagulate impurities in water, making them easier to remove through filtration.

• Chlorine is used as a disinfectant to kill harmful bacteria and pathogens in water.

• Alum and chlorine together help in making water safe for consumption by removing impurities and killing bacteria.

• Alum can also help in reducing the turbidity of water by causing particles to clump together for...read more

To check for pump alignment, use laser alignment tools and follow a step-by-step process.

• Use laser alignment tools to measure and correct misalignment

• Start by checking the pump and motor shafts for parallelism and angularity

• Measure the offset and angular misalignment using the laser alignment tool

• Adjust the pump and motor positions to achieve proper alignment

• Recheck the alignment after adjustments and make necessary corrections

• Ensure the coupling is properly aligned and tight...read more

I have handled various equipments such as pumps, compressors, valves, motors, and gearboxes in my role as a Mechanical Maintenance Engineer.

• Pumps

• Compressors

• Valves

• Motors

• Gearboxes

Brine is a solution of salt in water, commonly used for preserving food and de-icing roads.

• Brine is composed of water and salt

• It is commonly used for pickling vegetables and meats

• Brine is also used for de-icing roads in cold climates

Boiler typically uses demineralized or deionized water to prevent scale buildup and corrosion.

• Demineralized water

• Deionized water

• Reverse osmosis water

• Distilled water

The pH scale ranges from 0 to 14, with 7 being neutral, below 7 acidic, and above 7 alkaline.

• pH range is from 0 to 14

• 7 is considered neutral

• Below 7 is acidic

• Above 7 is alkaline

• Examples: Lemon juice has a pH of around 2, pure water has a pH of 7, and baking soda has a pH of around 9

Standard atmospheric pressure is approximately 101.3 kilopascals or 14.7 pounds per square inch.

• Standard atmospheric pressure is 101.3 kPa or 14.7 psi

• At sea level, the average atmospheric pressure is 101.3 kPa or 14.7 psi

• Pressure decreases with altitude, so atmospheric pressure is lower at higher elevations

The unit of pressure is the pascal (Pa).

• The pascal is defined as one newton per square meter (N/m²).

• Other common units of pressure include pounds per square inch (psi) and atmospheres (atm).

• Pressure can also be measured in millimeters of mercury (mmHg) or torr.

• In engineering, pressure is often expressed in kilopascals (kPa) or megapascals (MPa).

Types of impellers include open, semi-open, closed, and shrouded impellers.

• Open impeller: consists of blades attached to a central hub with no cover, allowing for easy flow of fluid.

• Semi-open impeller: has blades attached to a central hub with one side open, providing higher efficiency compared to open impellers.

• Closed impeller: features blades attached to a central hub with both sides covered, offering higher efficiency and better performance.

• Shrouded impeller: has blades en...read more

I have handled various equipment including pumps, compressors, turbines, and conveyors.

• Pumps: I have experience in maintaining and troubleshooting centrifugal pumps used in industrial processes.

• Compressors: I have worked with reciprocating and rotary compressors used for air and gas compression.

• Turbines: I have dealt with steam turbines used in power generation and gas turbines used in various applications.

• Conveyors: I have expertise in maintaining and repairing conveyor syst...read more