Sansera Engineering Diploma Trainee Engineer Interview Questions and Answers

Q1. How many axis in CNC machine.
Ans. 
Most CNC machines have 3 or 5 axes, but some advanced machines can have up to 9 axes.
• Most common CNC machines have 3 axes: X, Y, and Z.

• Some CNC machines have 5 axes: X, Y, Z, A, and B.

• Advanced CNC machines can have up to 9 axes, including rotational axes for more complex operations.

• The number of axes in a CNC machine determines the complexity of the operations it can perform.
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Q2. Define G and M code.
Ans. 
G and M codes are programming languages used in CNC machines to control various functions and operations.
• G codes are used to control the movement and positioning of the tool or workpiece on a CNC machine.

• M codes are used to activate or deactivate specific machine functions like coolant flow or spindle rotation.

• Example: G01 is a code for linear interpolation, while M03 is a code for spindle start in a CNC program.
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Q3. Difference between fiest angle projection and third angle projection.
Ans. 
First angle projection is commonly used in Europe and Asia, while third angle projection is commonly used in North America.
• First angle projection places the object in the first quadrant, with the plane of projection between the observer and the object.

• Third angle projection places the object in the third quadrant, with the plane of projection behind the object and the observer.

• In first angle projection, the top view is...read more
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Q4. Define 2 stroke and 4 stroke engine.
Ans. 
2 stroke engine completes the power cycle in 2 strokes of the piston, while 4 stroke engine completes it in 4 strokes.
• 2 stroke engine has intake, compression, power, and exhaust in 2 strokes

• 4 stroke engine has intake, compression, power, and exhaust in 4 strokes

• 2 stroke engines are simpler and lighter but less fuel efficient

• Examples of 2 stroke engines: chainsaws, mopeds, dirt bikes

• Examples of 4 stroke engines: cars, m...read more
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Q5. Least count of digital vernier calliper.
Ans. 
The least count of a digital vernier caliper is the smallest measurement that can be read on the scale.
• The least count of a digital vernier caliper is typically 0.01 mm or 0.0005 inches.

• It is determined by the number of divisions on the main scale and the number of divisions on the vernier scale.

• For example, if the main scale has 10 divisions and the vernier scale has 9 divisions, the least count would be 0.1 mm / 10 =...read more
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Q6. Define measuring gauge and it's types
Ans. 
Measuring gauge is a tool used to measure dimensions accurately. Types include calipers, micrometers, and height gauges.
• Measuring gauge is a precision tool used to measure dimensions accurately.

• Types of measuring gauges include calipers, micrometers, height gauges, etc.

• Calipers are used for measuring the distance between two opposite sides of an object.

• Micrometers are used for measuring very small distances or thicknes...read more
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Q7. Full form of CNC machine.
Ans. 
Computer Numerical Control machine is a manufacturing process that uses pre-programmed computer software to control the movement of tools and machinery.
• CNC stands for Computer Numerical Control

• CNC machines are used in manufacturing processes to automate tasks such as cutting, drilling, and milling

• Examples of CNC machines include CNC routers, CNC mills, and CNC lathes
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Q8. About college project.
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Q9. About connecting rod
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