PLTW Types of Holes Quiz

What kind of hole is highlighted in green? Select all that apply.

• Counterbore

• Countersink

• Simple

• Blind

• Through

What kind of hole is this? Assume the hole does NOT go all the way through, select all that apply.

• Counterbore

• Countersink

• Simple

• Blind

• Through

What kind of hole is this? Select all that apply.

• Counterbore

• Countersink

• Simple

• Blind

• Through

What kind of hole is hole A? Select all that apply

• Counterbore

• Countersink

• Simple

• Blind

• Through

For the countersink hole on the left, what does the x 82⁰ mean?

• It's the diameter of the hole

• It's the diameter of the countersink

• It's the depth of the countersink

• It's the angle made where the two countersink lines meet

What is the depth of the counterbore?

• THRU

• 0.251

• 7/16

• 1/4

• 0.001

What's the tolerance of the 0.251 diameter THRU hole?

• 0.251

• 7/16

• 1/4

• 0.001

Which hole note is written correctly, for the counterbore hole on the LEFT?

• ∅.438THRU

  ⊔∅.281ↆ9/32

• ∅.281THRU

  ⊔∅.438ↆ0.281

• ∅.438THRU

  ⊔∅.438ↆ.281

• ∅.281THRU

  ⊔∅.281ↆ.438

Which hole note is written correctly, for the counterbore hole on the RIGHT?

• ∅.442THRU

  ⊔∅.781ↆ9/16

• ∅.442THRU

  ⊔∅.562ↆ9/16

• ∅.562THRU

  ⊔∅.781ↆ.442

• ∅.781THRU

  ⊔∅.562ↆ.442

Select the symbol for DIAMETER

• 
• 
• 
• 
• Counterbore