FREE Millwright Precision Measuring and Layout Questions and Answers

Question 1

A standard outside micrometer shows the sleeve marking at 7.5 mm, the thimble is aligned with the 28th graduation (0.28 mm), and the vernier scale's 3rd line aligns (0.003 mm).
What is the final measurement?

Accepted Answer

7.783 mm

Answer

7.810 mm

Answer

7.528 mm

Answer

7.780 mm

Question 2

When checking for shaft runout using a dial indicator, the Total Indicated Reading (TIR) is 0.004 inches. What does this value represent?

Accepted Answer

The total diametrical variation in concentricity

Answer

The radius of the shaft

Answer

Half the actual runout

Answer

The shaft's surface finish

Question 3

What is the primary purpose of applying layout dye (bluing) to a workpiece before scribing?

Accepted Answer

To create a high-contrast background for scribed lines

Answer

To prevent rust during the layout process

Answer

To act as a lubricant for the scribing tool

Answer

To identify the hardness of the material

Question 4

When using a feeler gauge to check the clearance between two machine parts, what is the correct technique?

Accepted Answer

The correct blade should have a slight, even drag

Answer

Use the thickest blade that can be forced into the gap

Answer

Stack multiple blades to achieve the tightest fit

Answer

Select a blade that slides in and out with no resistance

Question 5

On a vernier caliper, the zero on the vernier scale is just past the 24 mm mark on the main scale. The 16th line on the vernier scale aligns perfectly with a line on the main scale. If the caliper's resolution is 0.02 mm, what is the measurement?

Accepted Answer

24.32 mm

Answer

24.16 mm

Answer

25.16 mm

Answer

24.016 mm

Question 6

Which method is most accurate for checking if a large rectangular machine base is perfectly square?

Accepted Answer

Measuring the diagonals to ensure they are equal

Answer

Using a large framing square on one corner

Answer

Placing a spirit level along all four sides

Answer

Using a precision straight edge to check for flatness

A standard outside micrometer shows the sleeve marking at 7.5 mm, the thimble is aligned with the 28th graduation (0.28 mm), and the vernier scale's 3rd line aligns (0.003 mm).What is the final measurement?

A standard outside micrometer shows the sleeve marking at 7.5 mm, the thimble is aligned with the 28th graduation (0.28 mm), and the vernier scale's 3rd line aligns (0.003 mm).
What is the final measurement?