Q. In CNC machining, what does CNC stand for?
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A.
Computer Numerical Control
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B.
Computerized Network Control
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C.
Controlled Numerical Calculation
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D.
Computerized Numerical Command
Solution
CNC stands for Computer Numerical Control, which is a method used to control machine tools via a computer.
Correct Answer:
A
— Computer Numerical Control
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Q. What is the main advantage of using CNC machines?
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A.
Higher labor costs
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B.
Increased manual intervention
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C.
Greater precision and repeatability
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D.
Slower production speeds
Solution
CNC machines offer greater precision and repeatability compared to manual machining processes.
Correct Answer:
C
— Greater precision and repeatability
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Q. What is the main disadvantage of traditional machining methods?
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A.
High precision
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B.
Material waste
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C.
Low production speed
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D.
Versatility
Solution
Traditional machining methods often result in significant material waste due to the removal of excess material.
Correct Answer:
B
— Material waste
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Q. What is the primary material removal mechanism in machining?
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A.
Melting
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B.
Deformation
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C.
Cutting
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D.
Joining
Solution
The primary material removal mechanism in machining is cutting, where a cutting tool removes material from the workpiece.
Correct Answer:
C
— Cutting
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Q. What is the primary purpose of machining in manufacturing?
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A.
To shape materials using heat
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B.
To remove material to achieve desired dimensions
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C.
To join two or more parts together
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D.
To create a part layer by layer
Solution
Machining primarily involves removing material from a workpiece to achieve the desired dimensions and surface finish.
Correct Answer:
B
— To remove material to achieve desired dimensions
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Q. What is the purpose of a tool path in CNC machining?
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A.
To determine the material type
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B.
To outline the cutting tool's movement
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C.
To set the machine's temperature
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D.
To join different parts
Solution
The tool path in CNC machining outlines the movement of the cutting tool to achieve the desired shape.
Correct Answer:
B
— To outline the cutting tool's movement
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Q. Which machining process is best suited for creating complex shapes?
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A.
Milling
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B.
Drilling
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C.
Turning
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D.
Grinding
Solution
Milling is particularly effective for creating complex shapes due to its ability to move the cutting tool in multiple directions.
Correct Answer:
A
— Milling
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Q. Which of the following is a common type of machining operation?
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A.
Casting
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B.
Welding
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C.
Turning
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D.
Molding
Solution
Turning is a common machining operation where a workpiece is rotated while a cutting tool removes material.
Correct Answer:
C
— Turning
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Q. Which of the following is NOT a type of additive manufacturing?
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A.
Fused Deposition Modeling (FDM)
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B.
Selective Laser Sintering (SLS)
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C.
Injection Molding
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D.
Stereolithography (SLA)
Solution
Injection molding is not a type of additive manufacturing; it is a subtractive process.
Correct Answer:
C
— Injection Molding
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Q. Which process is commonly used for joining metal parts?
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A.
Casting
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B.
Welding
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C.
Milling
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D.
Turning
Solution
Welding is a common process used for joining metal parts by melting and fusing them together.
Correct Answer:
B
— Welding
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