Inspecting & Interpreting Brake Drum Measurements: Test Lessons #14&15

Test – Inspecting and Interpreting Brake Drum Measurements

m+2c<D

Name: ______Date:______

  1. The diameter of a brake drum is 6.85 inches. There is a score on the cylinder wall that measures 0.015 inches deep. The maximum diameter of the drum can be machined to 6.95 inches. Can this drum be machined?
  1. The diameter of a brake drum is 152 mm. There is a score on the cylinder wall that measures .7mm deep. The maximum diameter of the drum can be machined to 153.25mm. Can this drum be machined?
  1. The diameter of a brake drum is 210 mm. There is a score on the cylinder wall that measures .025 inch deep. The maximum diameter of the drum can be machined to 212.5 mm. Can this drum be machined?
  1. Solve the following inequality when x=3 & y=1.5:

2x + 2y < 9

5.  Solve the following inequality when x=9 & y=4:

6x + y 50

Test – Inspecting and Interpreting Brake Drum Measurements (cont.)

6.  The maximum diameter of a brake drum is listed as 240 mm. The drum measures 237.5 mm. What size cut can be made before the drum must be discarded?

7.  The maximum diameter of a brake drum is listed as 4.25 inches. The drum measures 4.125 inches. What size cut can be made before the drum must be discarded?

8.  The maximum diameter of a brake drum is listed as 148mm. The drum is to be cut at .065 mm. What is the diameter of the drum?

9.  Solve the following inequality for x:

20 - 3x 65

10.  Solve the following inequality for x:

6x + 4 76


Inspecting and Interpreting Brake Drum Measurements

m+2c<D

ANSWER KEY

  1. The diameter of a brake drum is 6.85 inches. There is a score on the cylinder wall that measures 0.015 inches deep. The maximum diameter of the drum can be machined to 6.95 inches. Can this drum be machined?

6.88 inches < 6.95 inches

Yes, it can be machined

  1. The diameter of a brake drum is 152 mm. There is a score on the cylinder wall that measures .7mm deep. The maximum diameter of the drum can be machined to 153.25mm. Can this drum be machined?

153.4mm < 153.25mm

No, it cannot be machined

  1. The diameter of a brake drum is 210 mm. There is a score on the cylinder wall that measures .025 inch deep. The maximum diameter of the drum can be machined to 212.5 mm. Can this drum be machined?

210.05 mm < 212.5 mm

Yes, it can be machined

  1. Solve the following inequality when x=3 & y=1.5:

2x + 2y < 9

9 < 9

No

5.  Solve the following inequality when x=9 & y=4:

6x + y 50

58 50

Yes

6.  The maximum diameter of a brake drum is listed as 240 mm. The drum measures 237.5 mm. What size cut can be made before the drum must be discarded?

c 1.25 mm

7.  The maximum diameter of a brake drum is listed as 4.25 inches. The drum measures 4.125 inches. What size cut can be made before the drum must be discarded?

c .0625 inches

8.  The maximum diameter of a brake drum is listed as 148mm. The drum is to be cut at .065 mm. What is the diameter of the drum?

m 147.87 mm

9.  Solve the following inequality for x:

20 - 3x 65

x -15

10.  Solve the following inequality for x:

6x + 4 76

x 12

4

Math-in-CTE: Automotive Technology