Dembla Valves Mechanical Engg. Design Interview Questions and Answers

Q1. Which oil use Hydraulic system ?
Ans. 
Various types of oils can be used in hydraulic systems, including mineral oil, synthetic oil, and biodegradable oil.
• Mineral oil is commonly used in hydraulic systems due to its cost-effectiveness and compatibility with most systems.

• Synthetic oil is used in high-performance hydraulic systems for better temperature resistance and longevity.

• Biodegradable oil is used in environmentally sensitive areas to reduce the impact
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Q2. Which valve use in hydraulic system ?
Ans. 
Various types of valves are used in hydraulic systems, including directional control valves, pressure control valves, flow control valves, and check valves.
• Directional control valves are used to control the direction of fluid flow in the system.

• Pressure control valves are used to regulate the pressure within the system.

• Flow control valves are used to control the flow rate of the fluid in the system.

• Check valves are use...read more
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Q1. They asked about refrigeration principles
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Q2. They asked about reverse osmosis
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Reasoning, Maths qualities, General knowledge

Q1. Qualification and experience related questions
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Q2. Qualification related questions for freshers
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Q3. Experience related questions for experience
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Q1. What is pressure gauges
Ans. 
Pressure gauges are instruments used to measure the pressure of gases or liquids in a system.
• They typically consist of a dial, a pointer, and a Bourdon tube or diaphragm that responds to changes in pressure.

• They are commonly used in industrial, commercial, and residential settings to monitor and control pressure in various systems.

• Examples include tire pressure gauges, boiler pressure gauges, and blood pressure gauges.

• ...read more
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Q1. Product of wika group
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WIKA Group is a leading manufacturer of pressure and temperature measurement instruments.
• WIKA offers a wide range of products including pressure gauges, transmitters, switches, and diaphragm seals.

• Their products are used in various industries such as oil and gas, chemical, and food and beverage.

• WIKA has a global presence with manufacturing facilities and sales offices in over 100 countries.

• Some of their popular product...read more
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Q1. They ask questions related to SPM design, mostly focus on Jig-fixture design.
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Q2. Machining operation,
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Q3. Selection of material,
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Q4. Types of bearings, welding
Ans. 
Types of bearings include ball, roller, plain, and magnetic. Welding methods include MIG, TIG, and stick welding.
• Ball bearings use balls to reduce friction and support radial and axial loads.

• Roller bearings use cylindrical or tapered rollers to support heavy loads.

• Plain bearings have a sliding surface and are used for low-speed and high-load applications.

• Magnetic bearings use magnetic fields to support rotating shafts.

• ...read more
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Q5. Casting process and its types
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Casting is a manufacturing process in which a liquid material is poured into a mold and allowed to solidify.
• Types of casting include sand casting, investment casting, die casting, and continuous casting.

• Sand casting involves pouring molten metal into a sand mold.

• Investment casting involves creating a wax pattern and then coating it in ceramic before pouring in the molten metal.

• Die casting involves injecting molten meta...read more
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