Special Technical Services Llc, Oman Mechanical Engineer Interview Questions and Answers

Logical reasoning, quant, verbal

Q1. What is vernier caliper
Ans. 
A vernier caliper is a measuring instrument used to accurately measure the dimensions of an object.
• It consists of a main scale and a sliding vernier scale.

• The main scale is fixed and provides the primary measurement.

• The vernier scale slides along the main scale and provides the fractional measurement.

• The vernier scale has finer graduations than the main scale, allowing for more precise measurements.

• To measure an object...read more
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Q2. What is micrometer
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A micrometer is a precision measuring instrument used to measure small distances or thicknesses.
• Micrometers are commonly used in mechanical engineering and manufacturing industries.

• They provide accurate measurements with high precision, typically up to 0.001mm or 0.0001 inch.

• Micrometers consist of a calibrated screw mechanism and a scale or digital display for reading the measurement.

• They are often used to measure dime...read more
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Q1. What is CNC and VMC machine
Ans. 
CNC stands for Computer Numerical Control and VMC stands for Vertical Machining Center. They are machines used in manufacturing processes.
• CNC machines are automated machines that are controlled by a computer program to perform various tasks such as cutting, drilling, and shaping.

• VMC machines are a type of CNC machine that operates in a vertical orientation, allowing for precision machining of parts.

• Both CNC and VMC mac...read more
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Q1. Boiler startup producer
Ans. 
Boiler startup producer is a device used to ignite the fuel and start the combustion process in a boiler.
• Boiler startup producer is also known as an ignition system.

• It is responsible for producing a spark or flame to ignite the fuel.

• There are different types of startup producers such as pilot lights, electric starters, and oil guns.

• The type of startup producer used depends on the type of fuel and boiler being used.

• Prop...read more
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Q2. Boiler shutdown producer
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Q3. What is draft in boiler
Ans. 
Draft in a boiler refers to the flow of air or gases through the combustion chamber and flue gas passages.
• Draft is created by a difference in pressure between the inside and outside of the boiler.

• It is necessary for proper combustion and efficient operation of the boiler.

• There are two types of draft: natural draft and forced draft.

• Natural draft is created by the buoyancy of hot gases, while forced draft is created by m...read more
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Q4. Cooling tower performance
Ans. 
Cooling tower performance is measured by its ability to remove heat from a process stream.
• Cooling tower performance is affected by factors such as air flow rate, water flow rate, and temperature difference between the process stream and cooling water.

• The efficiency of a cooling tower can be improved by increasing the surface area of the heat transfer media, using a more efficient fan, or optimizing the water distributi...read more
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Q5. Pump lineup and its efficiency
Ans. 
Pump lineup is crucial for efficient operation. Proper selection and maintenance can improve efficiency.
• Pump lineup should be selected based on the required flow rate and head

• Centrifugal pumps are commonly used for low viscosity fluids while positive displacement pumps are used for high viscosity fluids

• Efficiency can be improved by proper maintenance such as regular cleaning and lubrication

• Variable frequency drives can...read more
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There will be 100 questions
25 Technical
25 English
25 GI
25 GK

Q1. This will include both technical (related to branch) and non technical questions (general questions).
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Q1. Tell us abt yourself
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Q2. Majority experience in field
Ans. 
I have 5 years of experience in the mechanical engineering field.
• Worked as a mechanical engineer for 5 years

• Experience in designing and testing mechanical systems

• Proficient in CAD software such as SolidWorks and AutoCAD

• Familiar with industry standards and regulations

• Collaborated with cross-functional teams to complete projects
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English grammer , maths and HOTS

Q1. Stress strain curve I.C engine related questions
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GD &T and basic mechanical engineer

Q1. Salary negotiation and basic background
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Q2. Last firm salary discussion
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