K.K NIRMAN GROUP Interview Questions and Answers

RO (Reverse Osmosis) is a water treatment process that uses a semi-permeable membrane to remove impurities. It involves the use of chemicals, different types of valves, backwashing, and cartridge filter replacement. The product water's pH, chlorine level, and conductivity/TDS vary.

• RO is a water treatment process that uses a semi-permeable membrane.

• Chemicals are used in RO plants to aid in the treatment process.

• Different types of valves, such as ball valves and gate valves, ar...read more

Chlorine is a chemical used for disinfection in water treatment. It kills harmful microorganisms and prevents the spread of waterborne diseases.

• Chlorine is a highly effective disinfectant used in water treatment plants.

• It kills bacteria, viruses, and other harmful microorganisms present in the water.

• Chlorine dosing ensures the water is safe for consumption and prevents the spread of waterborne diseases.

• The dosage of chlorine depends on the quality of the water and the level o...read more

pH is a measure of acidity or alkalinity. If pH is low, I will take corrective actions to raise it.

• Measure the pH using a pH meter or test strips

• Identify the cause of low pH, such as acidic feedwater or malfunctioning equipment

• Adjust the pH by adding chemicals like lime or soda ash

• Monitor the pH regularly to ensure it stays within the desired range

High pressure pumps are used in RO plants to increase the pressure of the feed water.

• High pressure pumps are responsible for increasing the pressure of the feed water in RO plants.

• They help in pushing the water through the RO membranes, allowing for the separation of impurities.

• These pumps are typically designed to handle high pressures, ranging from 150 to 1000 psi.

• They are often equipped with multiple stages to achieve the desired pressure.

• The high pressure pump plays a cru...read more

The conductivity of sea water varies depending on factors such as temperature and salinity.

• The conductivity of sea water is primarily influenced by the concentration of dissolved salts.

• Higher salinity levels result in higher conductivity.

• Temperature also affects conductivity, with warmer water having higher conductivity.

• The average conductivity of sea water is around 50,000 to 60,000 microsiemens per centimeter (µS/cm).

• However, conductivity can range from as low as 2,000 µS/c...read more

The plant capacity refers to the maximum amount of water that the RO plant can produce in a given time period.

• Plant capacity is typically measured in terms of gallons per day (GPD) or liters per hour (LPH).

• It is important to consider the demand for water in the area when determining the plant capacity.

• Factors such as feed water quality, membrane efficiency, and system design can affect the plant capacity.

• For example, a RO plant may have a capacity of 10,000 GPD, meaning it ca...read more

There are several types of bearings used in various applications.

• Plain bearings

• Rolling element bearings

• Jewel bearings

• Fluid bearings

• Magnetic bearings

• Flexure bearings

• Thrust bearings

• Tapered roller bearings

• Spherical roller bearings

• Needle roller bearings

• Ball bearings

Turbidity is the measure of the cloudiness or haziness of a liquid caused by suspended particles.

• Turbidity is a measure of the clarity of water.

• It is caused by suspended particles such as sediment, algae, or organic matter.

• Turbidity can be measured using a turbidimeter or by visual observation.

• High turbidity levels can indicate water pollution or the presence of harmful substances.

• Turbidity is an important parameter in water treatment processes, as it affects the efficiency o...read more