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IPC Journeyman Plumber > Plumbing Math & Pressure Calculations > Flashcards

Plumbing Math & Pressure Calculations Flashcards

Develop skills in plumbing calculations and pressure measurements.

1
Q

Convert:

2 3/8” to decimal inches

A

2.375”

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2
Q

Convert:

5 5/16” to decimal inches

A

5.312”

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3
Q

Convert:

7 15/16” to decimal inches

A

7.937”

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4
Q

Convert:

4 13/16” to decimal inches

A

4.812”

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5
Q

Convert:

6.187” to fractional inches

A

6 3/16”

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6
Q

Convert:

9.625” to fractional inches

A

9 5/8”

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7
Q

Convert:

4.125” to fractional inches

A

4 1/8”

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8
Q

Convert:

8.875” to fractional inches

A

8 7/8”

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9
Q

Convert:

12’ 9 1/4” to decimal feet

A

12.77’

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10
Q

Convert:

15’ 11 3/4” to decimal feet

A

15.98’

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11
Q

Convert:

4’ 6 1/2” to decimal feet

A

4.54’

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12
Q

Convert:

2’ 2 1/2” to decimal feet

A

2.21’

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13
Q

Convert:

16.71’ to feet and fractional inches

A

16’ 8 1/2”

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14
Q

Convert:

6.75’ to feet and fractional inches

A

6’ 9”

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15
Q

Convert:

21.125’ to feet and fractional inches

A

21’ 1 1/2”

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16
Q

Convert:

18.83’ to feet and fractional inches

A

18’ 10”

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17
Q

Find the area:

a square that is 8” on each side

Area = Side x Side

A

64 square inches

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18
Q

Find the area:

a square that is 24’ 3” on each side

Area = Side x Side

A

588 square feet

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19
Q

Find the area:

a room that is 8’ 6” in width and 16’ in length

Area = Length x Width

A

136 square feet

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20
Q

Find the area:

a room that is 24’ in width and 30’ in length

Area = Length x Width

A

720 square feet

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21
Q

Find the area:

a tank that has a diameter of 12 feet

Area = π x radius2

A

113 square feet

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22
Q

Find the area:

a tank that has a diameter of 20 inches

Area = π x radius2

A

314 square inches

Remember the radius is 1⁄2 of the diameter.
π = 3.14

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23
Q

Convert:

7.58’ to feet and fractional inches

A

7’ 7”

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24
Q

How tall is a water tower if the pressure at the base is 55 psi?

A

127 feet

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25
Q

What is the pressure if the water source is 155 feet above the point of delivery?

A

67.1 psi

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26
Q

Calculate the diagonal for a rolling offset made with two 45 degree fittings which has a rise of 8 inches and an offset of 7 inches.

A

15.03 inches

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27
Q

Convert:

8’ 7 1/4” to decimal feet

A

8.60’

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28
Q

Calculate the volume of a cylindrical tank that has a diameter of 30’ and a height of 20’.

Use Pi = 3.14

A

14,130 cubic feet

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29
Q

Calculate the diagonal for a pipe that offsets 36 inches using two 45 degree fittings.

A

50.9 inches

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30
Q

75 gallons into weight measurement in pounds

A

625 pounds

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31
Q

A toilet costs $257.00 at the supplier. The plumber will sell the toilet with a markup of 25%. What is the new price for the toilet?

32
Q

Find the drop if the grade is 1/8” per foot and the run is 100 feet.

33
Q

Calculate the measurement for M if the spread between pipes in parallel is 10” and
J is 17”.

See Math Practice Test Figure 7-33

34
Q

Calculate the measurement for N if the offset between pipes in parallel is 9”.

See Math Practice Test Figure 7-33

35
Q

Calculate the measurement for O if the spread between pipes is 10” and L is 16”.

See Math Practice Test Figure 7-33

36
Q

Find the drop if the grade is 1/4” per foot and the run is 30 feet.

37
Q

Find the percentage grade if the drop is 5 inches and the run is 40 feet.

38
Q

Convert:

2.375” to fractional inches

39
Q

Convert:

8 3/16” to decimal inches

40
Q

Calculate the diagonal for a pipe that offsets 40 inches using two 45 degree fittings.

A

56.5 inches

41
Q

Convert:

39’ 9 7/8” to decimal feet

42
Q

Find the drop if the percentage grade is 1% and the run is 40 feet.

43
Q

Find the area of a tank base that has a diameter of 18 feet. (Use Pi = 3.14)

A

254 square feet

44
Q

Find the grade of a pipe if the drop is 7 1/4” and the run is 58 feet.

A

1/8” per foot

45
Q

Convert:

7’ 5 1/8” to decimal feet

46
Q

Convert:

9 1/8” to decimal inches

47
Q

A faucet costs $675.00 at the supplier. The plumber will sell the faucet with a markup of 25%. What is the new price for the faucet?

48
Q

Convert:

3.687” to fractional inches

A

3 11/16”

49
Q

Convert:

10 cubic feet into gallons

A

75 gallons

50
Q

Convert:

13.91’ to feet and fractional inches

A

13’ 11”

51
Q

Calculate the measurement for a special case 90 degree offset using 45 degree
elbows for N if the spread between pipes is 12”.

See Math Practice Test Figure 7-34

A

25 7/16”

52
Q

Calculate the measurement for a special case 90 degree offset using 45 degree
elbows for O if the spread between pipes is 12”.

See Math Practice Test Figure 7-34

A

19 1/16”

53
Q

Calculate the measurement for a special case 90 degree offset using 45 degree
elbows for M if the spread between pipes is 12”

See Math Practice Test Figure 7-34

54
Q

Convert:

41,472 cubic inches into cubic feet

A

24 cubic feet

55
Q

Convert:

10 3/4” to decimal inches

56
Q

Calculate the diagonal for a rolling offset made with two 45 degree fittings which has a rise of 5 inches and an offset of 4 inches.

A

9.05 inches

57
Q

Find the volume of a tub that is 32” wide, 72” long and 17” deep on inside dimensions.

A

39,168 cubic inches

58
Q

Convert:

Find the volume of a tub that is 32” wide, 72” long and 17” deep on inside dimensions.

A

12 cubic feet

59
Q

Find the grade of a pipe if the drop is 7” and the run is 56 feet.

A

1/8” per foot

60
Q

Convert:

270 gallons to cubic feet

A

36 cubic feet

61
Q

What is the pressure at the base of a water tower that is 115 feet tall?

62
Q

Find the area of a room that is 14’ in width and 18’ in length.

A

252 square feet

63
Q

A fixture costs $167.00 at the supplier. The plumber will sell the fixture with a markup
of 20%. What is the new price for the fixture?

64
Q

A faucet costs $425.00 at the supplier. The plumber will sell the faucet with a markup
of 15%. What is the new price for the faucet?

65
Q

A water softener costs $765.00 at the supplier. The plumber will sell the water softener
with a markup of 45%. What is the new price for the softener?

66
Q

Find the grade of a pipe if the drop is 18 3/4” and the run is 75 feet.

A

1/4” per foot

67
Q

Find the grade of a pipe if the drop is 12 1/2” and the run is 25 feet.

A

1/2” per foot

68
Q

Find the grade of a pipe if the drop is 12 1/2” and the run is 200 feet.

A

1/16” per foot

69
Q

Find the drop if the grade is 1/4” per foot and the run is 50 feet.

70
Q

Find the drop if the grade is 1/4” per foot and the run is 80 feet.

71
Q

Find the drop if the grade is 1/8” per foot and the run is 50 feet.

72
Q

Find the percentage grade if the drop is 12 1/2 inches and the run is 100 feet.

73
Q

Find the percentage grade if the drop is 40 inches and the run is 160 feet.

74
Q

Find the drop if the percentage grade is 1% and the run is 80 feet.

75
Q

Find the drop if the percentage grade is 2% and the run is 50 feet.

IPC Journeyman Plumber (11 decks)

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