Aerospace Machining Theory Chapter 3 (22 August) Part 1)

1. 1. What is the primary function of CAD (Computer-Aided Design)?

• A) To simulate tool paths for CNC machines

• B) To generate design drawings using computer hardware and software

• C) To control production machines in manufacturing

• D) To create NC programs for CNC controllers

2. 2. Which of the following is an advantage of using CAM (Computer-Aided Manufacturing)?

• A) Increased manual intervention

• B) Decreased production rate

• C) Easier production of complex shapes

• D) Increased programming time

3. 3. What does the semi-finishing stage in CNC milling involve?

• A) Rough cutting the material to its final shape

• B) Creating a very fine surface finish

• C) Leaving a small amount of material for accurate finishing

• D) Removing all material in one pass

4. 4. Which CNC milling strategy is used to create an irregular shape or profile according to a contour?

• A) Slot Milling

• B) Pocket Milling

• C) Contour Milling

• D) Thin Wall Milling

5. 5. What is the key benefit of using helical drilling (helical interpolation) in CNC machining?

• A) Requires fewer tools

• B) Allows for longer tool life and reduced cycle times

• C) Reduces the need for 3-axis machines

• D) Eliminates the need for coolant

6. 6. What is the main purpose of the roughing stage in CNC milling?

• A) To create the final surface finish

• B) To make small adjustments to the part

• C) To remove large amounts of material quickly

• D) To ensure the material is at a fixed offset distance from the model

7. 7. Which milling process is ideal for cutting circular features on a workpiece using a spiral toolpath?

• A) Swarf Cutting

• B) Spiral Roughing

• C) Pocket Milling

• D) Slot Milling

8. 8. What does CAM software need from CAD before it can create a fabrication instruction set?

• A) The spindle speed of the machine

• B) The physical shape of the product (CAD model)

• C) The type of material being used

• D) The specific CNC machine being utilized

9. 9. Which of the following is NOT a stage in CNC milling?

• A) Roughing

• B) Semi-Finishing

• C) Finishing

• D) Polishing

10. 10. In thin wall milling, which of the following is a typical cutting condition?

• A) Low spindle speed

• B) High depth of cut

• C) High spindle speed and light depth of cut

• D) Low feed rate