Astt.Manager Interview Questions and Answers

Positive displacement pumps displace a fixed amount of fluid with each stroke while negative displacement pumps create a vacuum to draw fluid in.

• Positive displacement pumps have a fixed displacement volume while negative displacement pumps do not

• Positive displacement pumps are better suited for high viscosity fluids while negative displacement pumps are better suited for low viscosity fluids

• Examples of positive displacement pumps include gear pumps, piston pumps, and diaphrag...read more

The lubrication used for backup roll bearing is typically a high-viscosity oil or grease.

• High-viscosity oil or grease is used to ensure proper lubrication and prevent wear and tear on the bearing.

• The specific type of lubrication used may vary depending on the manufacturer's recommendations and the operating conditions of the equipment.

• Regular maintenance and lubrication of backup roll bearings is essential for optimal performance and longevity.

• Examples of lubricants that may ...read more

Erection and commissioning of pickling line project involves installation and testing of equipment for acid pickling of metal surfaces.

• Designing and engineering of the pickling line

• Procurement of equipment and materials

• Installation and assembly of equipment

• Testing and commissioning of the pickling line

• Training of personnel for operation and maintenance

The work roll bearing BEP can be calculated using the formula BEP = (0.5 x (F1 + F2) x L) / (F1 - F2)

• BEP stands for Bearing End Play

• F1 is the force on the roll due to the strip

• F2 is the force on the roll due to the backup bearings

• L is the length of the bearing

• The formula assumes that the forces are evenly distributed across the bearing

Cold rolling is a metalworking process that involves passing metal through rollers at a temperature below its recrystallization point.

• Cold rolling is used to reduce the thickness and increase the hardness of metal sheets and strips.

• It is commonly used in the production of automotive parts, appliances, and construction materials.

• The process can be done with various metals including steel, aluminum, and copper.

• Cold rolling can also improve the surface finish and flatness of the...read more