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?
2. 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?
3. 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?
4. 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
Math-in-CTE: Automotive Technology
1
Inspecting & Interpreting Brake Drum Measurements: Test
Lessons #14&15
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
Math-in-CTE: Automotive Technology
2
Inspecting & Interpreting Brake Drum Measurements: Test
Lessons #14&15
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
2. 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
3. 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
4. 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
Math-in-CTE: Automotive Technology
3
Inspecting & Interpreting Brake Drum Measurements: Test
Lessons #14&15
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
Math-in-CTE: Automotive Technology
4