GD&T - Geometric Dimensioning and Tolerancing Position Tolerancing Calculations Questions and Answers

Question 1

A hole is specified with a diameter of 10.5 ±0.2 mm.
The position tolerance is Ø0.1 mm at Maximum Material Condition (MMC).
If the actual measured diameter of the hole is 10.6 mm, what is the total positional tolerance?

Accepted Answer

Ø0.3 mm

Answer

Ø0.1 mm

Answer

Ø0.2 mm

Answer

Ø0.4 mm

Question 2

What is the formula for calculating the Virtual Condition of an internal feature of size, such as a hole, when controlled with a position tolerance at MMC?

Accepted Answer

MMC Size - Geometric Tolerance

Answer

LMC Size + Geometric Tolerance

Answer

LMC Size - Geometric Tolerance

Answer

MMC Size + Geometric Tolerance

Question 3

In a 'fixed fastener' assembly, two plates are joined. One has clearance holes and the other has tapped (threaded) holes. Using the standard formula to equally distribute the position tolerance, what is the calculation for the tolerance (T) for the holes in each plate?

Accepted Answer

T = (Hole MMC - Fastener MMC) / 2

Answer

T = (Hole MMC - Fastener MMC)

Answer

T = (Hole LMC - Fastener LMC) / 2

Answer

T = (Hole MMC + Fastener MMC) / 2

Question 4

A pin has a specified size of Ø25.0 mm ±0.1 mm and is controlled by a positional tolerance of Ø0.3 mm at MMC. What is the virtual condition of this pin?

Accepted Answer

Ø25.4 mm

Answer

Ø24.6 mm

Answer

Ø25.2 mm

Answer

Ø24.8 mm

Question 5

Which of the following is the primary reason for applying a positional tolerance at Maximum Material Condition (MMC)?

Accepted Answer

To allow for the use of functional gages and provide bonus tolerance for manufacturing.

Answer

To ensure the feature is located at its most accurate possible position.

Answer

To restrict the orientation of the feature more tightly than its location.

Answer

To apply the tolerance regardless of the feature's finished size.

Question 6

In a 'floating fastener' assembly, two plates with clearance holes are bolted together. The fastener has an MMC of 5.0 mm. The clearance holes in both plates have an MMC of 5.6 mm. What is the total positional tolerance (T) that can be assigned to the pattern of holes in EACH plate?

Accepted Answer

0.6 mm

Answer

0.3 mm

Answer

1.2 mm

Answer

Cannot be determined without LMC values

A hole is specified with a diameter of 10.5 ±0.2 mm.The position tolerance is Ø0.1 mm at Maximum Material Condition (MMC).If the actual measured diameter of the hole is 10.6 mm, what is the total positional tolerance?

A hole is specified with a diameter of 10.5 ±0.2 mm.
The position tolerance is Ø0.1 mm at Maximum Material Condition (MMC).
If the actual measured diameter of the hole is 10.6 mm, what is the total positional tolerance?