Duncan Engineering
Aaloo kachalu Interview Questions and Answers
Q1. Direction control valve function & different kind of center position?
Direction control valve controls the flow of fluid in hydraulic systems. Different center positions include open, closed, and neutral.
Direction control valve regulates the flow of fluid in hydraulic systems
Different center positions include open, closed, and neutral
Open center position allows fluid to flow through the valve even when it is not actuated
Closed center position blocks the flow of fluid when the valve is not actuated
Neutral center position allows fluid to flow thr...read more
Q2. What is the process design and development?
Process design and development involves creating and improving processes to meet specific goals and requirements.
Identifying the goals and requirements of the process
Designing the process flow and layout
Developing prototypes and testing them
Implementing the process in a real-world setting
Continuous improvement and optimization
Q3. 500kg has to be lifted select the bore size?
The bore size depends on the lifting mechanism and the required lifting speed.
Consider the lifting mechanism (hydraulic, pneumatic, electric, etc.)
Determine the required lifting speed
Calculate the force required to lift 500kg
Select a bore size that can generate the required force and speed
Q4. Pneumatic cylinders and valves selection criteria?
Selection criteria for pneumatic cylinders and valves
Consider the application requirements such as force, speed, and stroke length
Select the appropriate cylinder type such as single-acting, double-acting, or rodless
Choose the valve type based on the required flow rate and pressure
Consider the environment and operating conditions such as temperature and humidity
Ensure compatibility between the cylinder and valve components
Consider the cost and availability of the components
Q5. How to design pneumatic cylinder?
Designing a pneumatic cylinder involves selecting appropriate materials, determining required dimensions, and considering factors like pressure and load capacity.
Select appropriate materials based on application requirements (e.g. aluminum, stainless steel)
Determine required dimensions such as bore size, stroke length, and overall length
Consider factors like pressure rating, load capacity, and operating environment
Design seals and cushioning mechanisms for smooth operation an...read more
Q6. How to design Hydraulic Cylinders?
Designing hydraulic cylinders involves understanding the application requirements, selecting appropriate materials, determining cylinder size and type, and considering factors like pressure, speed, and load capacity.
Understand the application requirements and constraints
Select appropriate materials based on factors like pressure, temperature, and corrosion resistance
Determine the cylinder size and type based on the load capacity, stroke length, and speed requirements
Consider ...read more
Q7. Positioner working principle?
A positioner is a device used to control the position of an object or system.
Positioners use various mechanisms such as motors, gears, and actuators to move and control the position of objects.
They are commonly used in industrial automation, robotics, and manufacturing processes.
Positioners can be manual or automated, depending on the application.
Examples of positioners include robotic arms, CNC machines, and linear stages.
They are often used in conjunction with sensors and f...read more
Q8. Symbols of valves and peripheral hydraulic components used in a circuit
Valve symbols are used to represent hydraulic components in a circuit diagram.
Symbols are standardized and follow ISO 1219-1
Valve symbols include directional control valves, pressure control valves, flow control valves, and check valves
Peripheral hydraulic components include pumps, motors, cylinders, and accumulators
Symbols are used to create circuit diagrams that show the flow of hydraulic fluid
Understanding valve symbols is important for designing and troubleshooting hydrau...read more
Q9. Hydraulic circuit explanation
Hydraulic circuit is a system that uses fluid to transmit power.
Hydraulic circuits use a pump to pressurize fluid, which is then used to power actuators.
The fluid is typically oil or water-based and is stored in a reservoir.
Valves are used to control the flow of fluid through the circuit.
Hydraulic circuits are commonly used in heavy machinery, such as excavators and cranes.
The circuit can be open or closed, depending on the application.
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