✓ TradeExamPro

TradeExamPro › Apprenticeship & Trade Math › Trade math and blueprint reading

Fractions measurement practice questions

35 questions from the trade math and blueprint reading practice test.

Beta. These questions are new. They were written and checked with AI and have not yet been reviewed by a licensed tradesperson. If one looks wrong, use “Report this question” and we will fix it.

Fractions measurement practice test

10 questions, graded as you go, with the reason for every answer. No sign-up.

What this covers

Sample questions

Two pieces of copper tube measure 5 3/4 in and 2 7/8 in. What is their combined length?

  1. 8 5/8 in
  2. 7 5/8 in
  3. 8 1/8 in
  4. 8 7/8 in
Show the answer

A. 8 5/8 in

5 3/4 = 5 6/8. Fractions: 6/8 + 7/8 = 13/8 = 1 5/8. Whole numbers: 5 + 2 = 7. Total 7 + 1 5/8 = 8 5/8 in. Forgetting to carry the extra whole inch from 13/8 gives 7 5/8 in.

Reference: Adding mixed numbers: common denominator, then carry

An electrician cuts a 14 5/16 in piece from a 36 in length of conduit. Ignoring the width of the cut, how much conduit is left?

  1. 22 11/16 in
  2. 22 5/16 in
  3. 21 3/16 in
  4. 21 11/16 in
Show the answer

D. 21 11/16 in

Borrow one inch from 36: 35 16/16 − 14 5/16 = 21 11/16 in. Subtracting only the whole numbers and keeping the fraction (22 5/16) or forgetting the borrow (22 11/16) are the usual slips.

Reference: Subtracting a mixed number from a whole number by borrowing

A pipefitter cuts three pieces measuring 12 3/8 in, 9 5/8 in and 15 1/2 in from a 48 in length of pipe. Each of the three cuts wastes 1/8 in of material. How many inches of pipe are left? Answer as a decimal.

Answer in in.

Show the answer

10.125 in

Pieces: 12 3/8 + 9 5/8 + 15 1/2 = 37 1/2 in. Kerf: 3 × 1/8 = 3/8 in. Total used: 37 1/2 + 3/8 = 37 7/8 in. Left: 48 − 37 7/8 = 10 1/8 in = 10.125 in.

Reference: Adding mixed numbers and allowing for saw kerf

Other topics