Calderys India Refractories Interview Questions, Process, and Tips

Hydraulic systems use liquid to transmit power while pneumatic systems use gas.

• Hydraulic systems are typically used for heavy-duty applications such as construction equipment and aircraft landing gear.

• Pneumatic systems are often used in lighter applications such as air brakes on trucks and buses.

• Hydraulic systems are generally more powerful and can operate at higher pressures than pneumatic systems.

• Pneumatic systems ar...read more

Hydraulic fluid is a liquid used to transmit power in hydraulic machinery.

• Hydraulic fluid should have low compressibility to ensure efficient power transmission.

• It should have good lubricating properties to reduce wear and tear of hydraulic components.

• It should have good thermal stability to withstand high temperatures.

• It should have good chemical stability to resist oxidation and corrosion.

• Common examples of hydraulic...read more

Hydraulic fluids can be differentiated based on their viscosity, additives, and base oil.

• Viscosity: determines the fluid's resistance to flow

• Additives: improve the fluid's performance and protect against wear and corrosion

• Base oil: can be mineral, synthetic, or vegetable-based

• Examples: mineral oil, synthetic oil, water-based fluids

A boiler is a closed vessel used to generate steam or hot water for heating purposes. 5 tonne represents the capacity of the boiler.

• Boilers are used in various industries such as power generation, heating, and chemical processing.

• They work by heating water or other fluids to produce steam or hot water.

• The capacity of a boiler is measured in tonnes, with 1 tonne equal to 1000 kg.

• A 5 tonne boiler can produce 5000 kg of s...read more

Boilers are classified into different types based on their working pressure, fuel type, and application.

• Fire-tube boilers

• Water-tube boilers

• Electric boilers

• Gas boilers

• Oil boilers

• Solid fuel boilers

• Condensing boilers

• Non-condensing boilers