Besco Mechanical Engg. Design Interview Questions and Answers

Q1. Duty time, company role, department,
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Q2. Salary,duty,timing
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Q4. Expected salary
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Q1. Mechanical branch selected optional industrial engineering powerplant and workshop technology
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Q2. Technical questions objective types
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Q1. What is centrifugal pump?
Ans. 
A centrifugal pump is a mechanical device used to transport fluids by converting rotational kinetic energy into hydrodynamic energy.
• Centrifugal pumps are commonly used in various industries, including oil and gas, water treatment, and HVAC systems.

• They work by using an impeller to rotate and create a centrifugal force, which pushes the fluid towards the pump outlet.

• The fluid enters the pump through the suction inlet an...read more
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Q2. How many types of valve? What are they?
Ans. 
There are several types of valves used in mechanical systems.
• Gate valve: used to control the flow of fluid by lifting or lowering a gate

• Ball valve: uses a ball to control the flow of fluid

• Butterfly valve: uses a disc to control the flow of fluid

• Check valve: allows fluid to flow in one direction only

• Globe valve: controls flow by raising or lowering a plug

• Needle valve: uses a long, tapered needle to control flow

• Diaphragm...read more
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Q3. Write about ball valve?
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A ball valve is a type of valve that uses a ball-shaped disc to control the flow of fluid through a pipe.
• Ball valves are commonly used in industrial applications for their durability and reliability.

• They have a simple design, consisting of a ball with a hole in the middle that can be rotated to control the flow of fluid.

• Ball valves can be either full port or reduced port, depending on the size of the ball and the hole.

• ...read more
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Q4. What is shell and tube heat exchanger?
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A shell and tube heat exchanger is a device used to transfer heat between two fluids.
• Consists of a shell (outer vessel) and tubes (inner vessels)

• One fluid flows through the tubes while the other flows around the tubes in the shell

• Heat is transferred from one fluid to the other through the tube walls

• Commonly used in industries such as power generation, chemical processing, and HVAC

• Example: Cooling water in a power plant
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Q5. How many types of heat exchanger? What are they?
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There are several types of heat exchangers, including shell and tube, plate and frame, and finned tube.
• Shell and tube heat exchangers are the most common type and consist of a shell with tubes inside.

• Plate and frame heat exchangers use thin plates to transfer heat between fluids.

• Finned tube heat exchangers have tubes with fins attached to increase surface area for heat transfer.

• Other types include spiral, double pipe, ...read more
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Q6. What is that full form of PPE?
Ans. 
PPE stands for Personal Protective Equipment.
• PPE is equipment worn to minimize exposure to hazards that may cause serious workplace injuries or illnesses.

• Examples of PPE include safety glasses, gloves, hard hats, respirators, and safety shoes.

• PPE should be selected based on the specific hazards present in the workplace.

• Employers are responsible for providing PPE to their employees and ensuring that it is properly maint...read more
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Q7. What is axial flow pump?
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An axial flow pump is a type of pump that uses an impeller to create fluid flow parallel to the pump shaft.
• Axial flow pumps are commonly used in applications where large volumes of fluid need to be moved at low to medium pressures.

• They are often used in irrigation systems, drainage systems, and cooling systems.

• The impeller of an axial flow pump has blades that resemble a propeller, which helps in generating the axial f...read more
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Q8. Write about check valve?
Ans. 
A check valve is a mechanical device that allows fluid to flow in one direction only.
• Check valves are commonly used in plumbing systems to prevent backflow of water.

• They are also used in hydraulic systems to prevent reverse flow of fluid.

• Check valves can be classified into different types such as swing check valves, lift check valves, and ball check valves.

• These valves work by using a disc or a ball that opens and clos...read more
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Q9. Shortly explain about positive displacement pump?
Ans. 
Positive displacement pump is a type of pump that moves fluid by trapping a fixed amount of it and then forcing it into the discharge pipe.
• Positive displacement pumps operate by trapping a specific volume of fluid and then forcing it into the discharge pipe.

• These pumps are capable of generating high pressures and are used in various industries such as oil and gas, chemical, and food processing.

• Examples of positive disp...read more
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Q10. What is globe valve?
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A globe valve is a type of valve used to regulate or stop the flow of fluid in a pipeline.
• It has a spherical body with an internal baffle that directs the flow of fluid.

• The valve can be opened or closed by rotating the stem.

• It provides a tight seal when closed, preventing leakage.

• Globe valves are commonly used in applications where throttling or regulating flow is required.

• They are often found in water systems, steam s
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Q11. What is PPE ? Give it explain?
Ans. 
PPE stands for Personal Protective Equipment. It refers to protective clothing, helmets, goggles, or other equipment designed to protect the wearer's body from injury or infection.
• PPE is used in various industries to protect workers from hazards.

• Examples of PPE include safety glasses, gloves, hard hats, respirators, and earplugs.

• PPE should be selected based on the specific hazards present in the workplace.

• Proper traini...read more
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Q1. What is pump,boiler, cooling tower etc
Ans. 
Pump, boiler, and cooling tower are all essential components in mechanical engineering used for fluid transfer, heat generation, and heat dissipation.
• Pump: A device used to move fluids by mechanical action. Examples include centrifugal pumps and positive displacement pumps.

• Boiler: A closed vessel in which water or other fluid is heated to generate steam or hot water. Examples include fire-tube boilers and water-tube bo...read more
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Q2. Working of ahu,nitrogen plant
Ans. 
AHU stands for Air Handling Unit, which is used to regulate and circulate air in a building. A nitrogen plant is used to produce nitrogen gas.
• AHU is responsible for conditioning and circulating air in a building to maintain a comfortable environment.

• Nitrogen plants use various methods such as pressure swing adsorption or cryogenic distillation to separate nitrogen from air.

• Nitrogen gas produced by the plant is used in ...read more
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