EBOLC Demolition Exam Questions And
Answers Verified 100% Correct
What's a booster? - ANSWER- High strength blasting cap with an internal charge
How do you tie in a branch line to a ring main or line main? - ANSWER- girth hitch with
a extra turn
How do you connect M151/M152 to a ring main or line main? - ANSWER- J-hook with
an extra loop
How long is the tail on det cord after it's tied off? - ANSWER- 6" inches
Knot type to prime C4 in cold temperatures - ANSWER- Uli Knot
Knot type to prime C4 in warm or cold temperatures - ANSWER- double over hand knot
6 Steps for calculating total amount of explosives - ANSWER- 1)Identify & measure the
critical dimensions
2)Calculate using explosive formula or Use Rule of Thumb (ROT)
*If you have ROT in step 2, ignore step 3
3)Divide by the RE Factor
4)Divide by package weight/volume (round up)
5) Calculate for number of charges
6)Calculate for total amount of explosives
External Timber Cutting Charge Formula - ANSWER- P= (D^2)/40
P=Pounds of explosive per target
D=Diameter
Four Formula types for Charges
*Just for exam - ANSWER- 1)External Timber Cutting Charge
2)Stump Removal
3)Block Charge
4)Ribbon Charge (We will be tested on this more than likely)
Block Charge - ANSWER- P=(0.375)*A
P=Pounds of explosive
A=area of cross section in square
0.375=constant
Stump Removal Rules of Thumb - ANSWER- 1)Dead Stump: 1 pound per foot of
, diameter
2)Live Stump: 2 pounds per foot of diameter
3) Standing Tree: 3 pounds per foot of diameter
*Convert Circumference to diameter
Note: Measurements are taken 12 to 18 inches above the ground
Special Steel Cutting Charges Rule of Thumb - ANSWER- 1) Charge Thickness= 0.5
Target Thickness but never less than 0.5 inch
2) Charge width= 3 times the charge thickness
3)Charge length= length of target thickness to be cut
*Divide by 20cu volume for C4 instead of 1.25 package weight
Formula Based Flowchart - ANSWER- Data
Formula
RE factor
Package Weight
No. Targets
Targets x Package = TOTAL
Rule of Thumb Flowchart - ANSWER- Data
Rule Of Thumb
NA
Package Weight
No. Targets
Targets x Package = TOTAL
External Timber Formula - ANSWER- P=D^
Stump Removal ROT - ANSWER- Dead: 1 lb charge per foot
Alive Stump: 2 lb charge per foot
Standing Tree: 3 lb charge per foot
Circumference to Diameter - ANSWER- C / 3.14 = D
Ring Charge - ANSWER- P= D^
Block Charge Formula - ANSWER- P=0.375 x A
Aria of an 'I' Beam formula - ANSWER- A = (tW x tH)+(wW x wH)+(bW x bH)
Ribbion Charge ROT - 'I' Beam - ANSWER- Charge Thickness = .5 of target Thickness
Charge Width = 3 x Charge Thickness
Charge Length = Length of Target
Answers Verified 100% Correct
What's a booster? - ANSWER- High strength blasting cap with an internal charge
How do you tie in a branch line to a ring main or line main? - ANSWER- girth hitch with
a extra turn
How do you connect M151/M152 to a ring main or line main? - ANSWER- J-hook with
an extra loop
How long is the tail on det cord after it's tied off? - ANSWER- 6" inches
Knot type to prime C4 in cold temperatures - ANSWER- Uli Knot
Knot type to prime C4 in warm or cold temperatures - ANSWER- double over hand knot
6 Steps for calculating total amount of explosives - ANSWER- 1)Identify & measure the
critical dimensions
2)Calculate using explosive formula or Use Rule of Thumb (ROT)
*If you have ROT in step 2, ignore step 3
3)Divide by the RE Factor
4)Divide by package weight/volume (round up)
5) Calculate for number of charges
6)Calculate for total amount of explosives
External Timber Cutting Charge Formula - ANSWER- P= (D^2)/40
P=Pounds of explosive per target
D=Diameter
Four Formula types for Charges
*Just for exam - ANSWER- 1)External Timber Cutting Charge
2)Stump Removal
3)Block Charge
4)Ribbon Charge (We will be tested on this more than likely)
Block Charge - ANSWER- P=(0.375)*A
P=Pounds of explosive
A=area of cross section in square
0.375=constant
Stump Removal Rules of Thumb - ANSWER- 1)Dead Stump: 1 pound per foot of
, diameter
2)Live Stump: 2 pounds per foot of diameter
3) Standing Tree: 3 pounds per foot of diameter
*Convert Circumference to diameter
Note: Measurements are taken 12 to 18 inches above the ground
Special Steel Cutting Charges Rule of Thumb - ANSWER- 1) Charge Thickness= 0.5
Target Thickness but never less than 0.5 inch
2) Charge width= 3 times the charge thickness
3)Charge length= length of target thickness to be cut
*Divide by 20cu volume for C4 instead of 1.25 package weight
Formula Based Flowchart - ANSWER- Data
Formula
RE factor
Package Weight
No. Targets
Targets x Package = TOTAL
Rule of Thumb Flowchart - ANSWER- Data
Rule Of Thumb
NA
Package Weight
No. Targets
Targets x Package = TOTAL
External Timber Formula - ANSWER- P=D^
Stump Removal ROT - ANSWER- Dead: 1 lb charge per foot
Alive Stump: 2 lb charge per foot
Standing Tree: 3 lb charge per foot
Circumference to Diameter - ANSWER- C / 3.14 = D
Ring Charge - ANSWER- P= D^
Block Charge Formula - ANSWER- P=0.375 x A
Aria of an 'I' Beam formula - ANSWER- A = (tW x tH)+(wW x wH)+(bW x bH)
Ribbion Charge ROT - 'I' Beam - ANSWER- Charge Thickness = .5 of target Thickness
Charge Width = 3 x Charge Thickness
Charge Length = Length of Target
