nuSecond Technologies 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

Vernier least count is the smallest measurement that can be made using a Vernier caliper or scale.

• It is the difference between the smallest division on the main scale and the smallest division on the Vernier scale.

• It is used to measure the accuracy of the instrument.

• For example, if the main scale has divisions of 1 mm and the Vernier scale has divisions of 0.1 mm, the least count would be 0.1 mm.