Which of the listed types of machined 'hole'...

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Question 1 of 2066636eee28f7522a1c51eced

Which of the listed types of machined 'hole' is represented by "B" as shown in the illustration? Illustration GS- 0015

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66636eee28f7522a1c51eced

Which of the listed types of machined 'hole' is represented by "B" as shown in the illustration? Illustration GS- 0015

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🔍 Key Concepts

• Difference between a countersink and a counterbore (shape: angled vs straight, and bottom: conical vs flat). • How a spotface compares to a counterbore (usually shallow, just enough to give a flat bearing surface). • What a counterdrill does to an existing drilled hole (enlarges part of its length without creating a wide flat seat).

💭 Think About

• Look closely at hole B: is the enlarged portion straight or angled? Does it have a clearly defined flat bottom shoulder, or does it taper? • Compare B with A, C, and D: which one is clearly angled, which ones are very shallow, and which ones are deeper straight enlargements? • Think about which type of machined hole is typically used to recess a bolt head with a flat underside into the material.

✅ Before You Answer

• Verify whether the upper enlarged section at B has vertical (parallel) sides or an angled profile. • Check if the bottom of the enlarged section at B is clearly flat with a sharp corner where it meets the smaller hole. • Compare the depth of the enlargement at B with D to decide whether it is a standard counterbore or just a shallow spotface.

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Question 1 of 2066636eee28f7522a1c51eced

Which of the listed types of machined 'hole' is represented by "B" as shown in the illustration? Illustration GS- 0015

Back

Question 1 of 20

66636eee28f7522a1c51eced

Which of the listed types of machined 'hole' is represented by "B" as shown in the illustration? Illustration GS- 0015

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

💭 Think About

✅ Before You Answer

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