Megha Engineering & Infrastructures Senior Engineer Interview Questions and Answers

Silk percentage in sand is zero.

• Silk is a natural fiber produced by silkworms, while sand is composed of small particles of minerals.

• Silk and sand have completely different compositions and properties.

• There is no silk present in sand, so the silk percentage in sand is zero.

The m20 grade ratio refers to the mix ratio of cement, sand, and aggregate used in concrete construction.

• The m20 grade ratio is commonly used for general construction purposes.

• The ratio for m20 grade concrete is 1:1.5:3, which means 1 part cement, 1.5 parts sand, and 3 parts aggregate by volume.

• For example, if you need to make 1 cubic meter of m20 grade concrete, you would need 1/5 cubic meter of cement, 1.5/5 cubic me...read more

There are several types of pumps including centrifugal, positive displacement, and axial flow pumps.

• Centrifugal pumps use a rotating impeller to move fluid, while positive displacement pumps use a mechanical means to move fluid.

• Axial flow pumps are used for low head and high flow rate applications.

• Other types of pumps include jet pumps, gear pumps, and peristaltic pumps.

• The type of pump used depends on the application ...read more

There are several types of pipes, including metal, plastic, ceramic, and concrete.

• Types of pipes include metal, plastic, ceramic, and concrete.

• Metal pipes include copper, steel, and iron.

• Plastic pipes include PVC, CPVC, and PEX.

• Ceramic pipes are used for sewer lines.

• Concrete pipes are used for drainage and sewage systems.

There are several types of valves used in various industries, including gate, globe, ball, butterfly, and check valves.

• Valves are used to control the flow of fluids or gases in a system.

• Gate valves are used for on/off control and have a sliding gate that blocks or allows flow.

• Globe valves have a movable disk that regulates flow and are used for throttling.

• Ball valves have a rotating ball with a hole that controls flow ...read more

Velocity valve regulates the flow of fluid in a hydraulic system based on the velocity of the fluid.

• Velocity valve is used in hydraulic systems to control the speed of actuators.

• It regulates the flow of fluid based on the velocity of the fluid.

• It helps in maintaining a constant speed of the actuator.

• Examples of velocity valves include flow control valves and pressure control valves.

A surge tank is used to control water pressure and prevent water hammer in a hydraulic system.

• A surge tank absorbs excess pressure caused by sudden changes in flow rate.

• It helps maintain a steady and controlled flow of fluid in the system.

• The surge tank acts as a reservoir to store and release fluid as needed.

• It prevents water hammer, which is a sudden increase in pressure due to the rapid deceleration or stoppage of f...read more

The impeller in vertical turbine pumps can be lifted or adjusted by removing the pump bowl and using a hoist or crane to lift the impeller out of the bowl.

• Remove the pump bowl cover and the column pipe

• Use a hoist or crane to lift the impeller out of the bowl

• Adjust the impeller by changing the number or position of the impeller blades

• Reinstall the impeller and pump bowl cover

Laser alignment tool is used for alignment in vertical turbine pumps.

• Laser alignment tool is used to align the pump and motor shafts.

• It helps to ensure that the pump operates efficiently and reduces wear and tear.

• The tool emits a laser beam that is projected onto a target on the opposite shaft.

• The alignment is adjusted until the laser beam hits the center of the target.

• Examples of laser alignment tools include the SKF ...read more

Alignment devices are valuable for ensuring precision and accuracy in various industries.

• Alignment devices help to ensure that machinery and equipment are properly aligned, which can improve efficiency and reduce wear and tear.

• They are commonly used in industries such as manufacturing, construction, and automotive.

• Examples of alignment devices include laser alignment tools, dial indicators, and optical alignment system...read more

Without an air valve, the pipeline may experience air pockets, which can cause blockages, reduced flow, and damage to the pipeline.

• Air pockets can cause blockages and reduced flow in the pipeline.

• The pipeline may also experience damage due to the pressure caused by the air pockets.

• An air valve is necessary to release the air pockets and maintain the proper flow of the pipeline.

• Without an air valve, the pipeline may req...read more