Vaaman Engineers Senior Technician Interview Questions, Process, and Tips for Experienced

A pump is a mechanical device used to move fluids from one place to another.

• Pumps are commonly used in various industries such as water treatment, oil and gas, and manufacturing.

• There are different types of pumps including centrifugal pumps, diaphragm pumps, and gear pumps.

• Pumps can be powered by electricity, engines, or manual operation.

• Examples of pumps include water pumps used in households, fuel pumps at gas statio...read more

Centrifugal pump works by converting mechanical energy from a motor into kinetic energy in the fluid being pumped.

• Centrifugal force is created by the rotation of the pump impeller, which pushes the fluid towards the outer edges of the pump casing.

• The kinetic energy of the fluid increases as it moves through the pump, creating pressure that forces the fluid out of the pump discharge.

• Common applications of centrifugal pu...read more

Pressure regulating valve maintains a constant pressure downstream, while pressure reducing valve reduces the pressure from a higher level to a lower level.

• Pressure regulating valve maintains a constant pressure downstream by adjusting the flow rate through the valve.

• Pressure reducing valve reduces the pressure from a higher level to a lower level, ensuring it stays within a specific range.

• Pressure regulating valves ar...read more

A DC valve is a type of valve that controls the flow of direct current (DC) electricity in a circuit.

• DC valves are used to regulate the flow of DC current in various applications.

• They can be either normally open or normally closed, allowing or blocking the flow of current respectively.

• DC valves are commonly used in hydraulic systems, automotive applications, and industrial machinery.

• Examples of DC valves include soleno...read more

Pascal's law states that a change in pressure applied to an enclosed fluid is transmitted undiminished to all portions of the fluid and to the walls of its container.

• Pressure applied to a confined fluid is transmitted equally in all directions.

• The principle is used in hydraulic systems to generate mechanical force.

• Example: Hydraulic car brakes work based on Pascal's law.

• Example: Hydraulic lifts use Pascal's law to lift...read more

Pressure point of a gear is the point where the maximum force is applied to transmit power.

• Pressure point is where the teeth of two gears come into contact.

• It is the point where the force is exerted to transmit power from one gear to another.

• Proper lubrication and maintenance of pressure points are essential for smooth gear operation.

Module of a gear refers to the ratio of the pitch diameter to the number of teeth on the gear.

• Module is a key parameter in gear design and is used to determine the size of the gear teeth.

• It is calculated as the ratio of the pitch diameter to the number of teeth on the gear.

• Common modules include 1, 1.5, 2, 2.5, etc.

• Higher module values indicate larger gear teeth and vice versa.

The lubricant oil used in hydraulic systems is hydraulic oil, and the suitable grade depends on the specific requirements of the system.

• Hydraulic oil is specifically designed for use in hydraulic systems to provide lubrication, cooling, and sealing.

• The grade of hydraulic oil depends on factors such as operating temperature, pressure, and system design.

• Common grades of hydraulic oil include ISO VG 32, ISO VG 46, and ISO...read more