GD&T Symbols and Rules 3

Question 1

What does the 'free state' symbol (circle with the letter F) indicate in a GD&T callout?

Accepted Answer

The tolerance applies after release from manufacturing fixturing

Answer

The part must be inspected while clamped

Answer

The feature is a free-turning axis

Answer

The tolerance applies only at room temperature

Question 2

A profile of a line tolerance differs from a profile of a surface tolerance in that it:

Accepted Answer

Controls only a cross-sectional slice at any given location

Answer

Controls the entire 3D surface simultaneously

Answer

Requires two datum references

Answer

Only applies to cylindrical features

Question 3

In a feature control frame, the compartment immediately following the tolerance value compartment contains:

Accepted Answer

The primary datum reference

Answer

The geometric characteristic symbol

Answer

The material condition modifier for the tolerance

Answer

The bonus tolerance value

Question 4

Which symbol, when placed below a feature control frame, indicates that the tolerance applies to the entire length or surface — not per unit?

Accepted Answer

No additional symbol is needed; it applies to the entire extent by default

Answer

An 'E' modifier in the frame

Answer

An underline beneath the frame

Answer

The 'T' symbol for total

Question 5

Which of the following is NOT a valid runout tolerance symbol in ASME Y14.5?

Accepted Answer

Total Runout of a Plane Surface

Answer

Circular Runout

Answer

Total Runout

Answer

Runout of a Conical Surface

Question 6

The diameter symbol (ø) placed before a tolerance value in a feature control frame means the tolerance zone is:

Accepted Answer

Cylindrical

Answer

Equal in all directions on a flat plane

Answer

A width between two parallel lines

Answer

Spherical

Question 7

According to ASME Y14.5, which rule governs the relationship between size tolerance and form tolerance for an individual feature of size?

Accepted Answer

Rule #1 (Envelope Principle)

Answer

Rule #2 (RFS Default)

Answer

Rule #3 (Datum Precedence)

Answer

Rule #4 (Virtual Condition)