Offset homework and quiz

complete the following assignment.  questions 1-8 counts as one shop homework grade.  questions 9-14 counts as a second shop homework grade.  questions 15-20 count as a shop quiz grade. this assignment is due Friday February 27, 2015.

Use the following formula to calculate offset location:

       “A”=D-[(H x M1) + C]    Given:  ½” EMT   Angle =30 degrees  D= 24”  H=8” 

    M1=1.00  C= 5”

1.  Mark A=  ____________     2.   Mark B=  _____________

Given:   ¾” EMT      Angle= 45 degrees   D= 39 ½”  H= 4”   M1= 1.73   C= 5 ½”

3.   Mark A= ____________     4.   Mark B= ______________

Given:  ½”  EMT   Angle= 45 degrees D=26”   H= 10”  M1=1.73   C= 5”

5        Mark A = ______________  6.  Mark B = ______________

Given:  ¾”  EMT   Angle 30 degrees     D= 31 “  H=7”  M1-1.00  C=  5 ½”

7.  Mark A= _____________     8.  Mark B = ________________

Use the following formula to calculate offset location:

     B=D + ( H x Sv )    Given:   ½” EMT  Angle= 30 degrees H= 8” Sv= ¼”

9.  Mark B= _____________   10.  Mark A = _____________

Given:  1” EMT  Angle = 45 degrees   H = 4”  Sv= 3/8”

11.  Mark B=  _____________  12.  Mark A= ______________

Given:  ¾” EMT  Angle = 30 degrees  H=14”  Sv=1/4”

13.  Mark B= _____________       14.  Mark A = ______________

Calculate marks A2, A3 and B1 ( or B2 or B3 ) for the following parallel offset problems:

Adjustment= S x T    S = spacing  T = tangent for ½ of offset angle

Given:  1” EMT  Angle= 30 degrees  H= 4”  S= 4.163”  T= .2679

15.  Mark A2= ________   16.  Mark A3= __________  17.  Mark B1= _________

Given:   1” EMT  Angle= 30 degrees  H= 6”  S= 4.163”  T= .2679

18.  Mark A2= ________  19.  Mark A3= __________  20.  Mark B1= _________

90 degree pipe bending chart

please read chart carefully.  the first number given is for the 90 degree bend.  the second number is for the leg.  also note the rubric for scoring.

NAME	90	KICK	BOX	OFFSET	3-BEND	4-BEND
	11” x 20 1/4”
	13” x 17 ¼”
	16” x 20 3/4”
	12” x 15 ½”
	14” x 16 ¼”
	15” x 19 ½”
	13” x 18 ¾”
	12” x 22 ¼”
	20” x 23 ¼”
	11” x 16 ¾”
	14” x 20 ¼”
	15” x 21 ½”
	10” x 16 ¾”
	13” x 20 ¾”
	14” x 21 ¼”
	18” x 24 ¼”
	16” x 23 ½”
	15” x  20 ¼”
	16”x 18”
	17” x 19”
	20” x 20”

RUBRICS:   90:                   25 points each for tools/safety, measurement, plumb, reamed.