DEMOLITIONS EXAM ACTUAL EXAM 70 QUESTIONS AND CORRECT DETAILED ANSWERS WITH RATIONALES|ALREADY GRADED A

DEMOLITIONS EXAM ACTUAL EXAM 70 QUESTIONS AND CORRECT DETAILED ANSWERS WITH RATIONALES|ALREADY GRADED A Which method of attack is preferred on a steel truss deck bridge with top supports? - ANSWER- bottom attack Using the Hasty method, how many total packages of C4 (M112) would be required to breach a reinforced concrete wall, which is 7 feet thick, and 16 feet wide, using elevated untamped charges? - ANSWER- 200 What is the value of "k" when you are destroying a 5-foot thick dense concrete wall using external charge? - ANSWER- 0.41 Using a minimum amount of explosives, how many packages of M112 are required to cut 11 trees with an average diameter of 34 inches? - ANSWER- 33 trees Using the Hasty method, how many total packages of M112 are needed for a shallow water placed charge on a 3-foot thick Dense concrete first class masonry wall? - ANSWER- 19 How many packages of M112 are required to cut 11 trees, 34 inches in diameter using a timber cutting charge? Calculate for minimum charge size. - ANSWER- 33 pkgs Which road crater produces the least effective barrier? - ANSWER- Hasty Using a minimum amount of M112, how many packages are required to cut an I-beam with the following dimensions: flange 8" X 1" thick and web 14" X 1" thick? - ANSWERnot 3 or 4 How many total pounds of TNT are required to construct a relieved-face road crater with a road width measuring 55 feet? - ANSWER- 740 How many Composition H6 cratering charges are needed to destroy an abutment that is 5 feet thick, 15 feet high, and 42 feet wide? - ANSWER- 8 Using the minimum amount of explosives, how many total packages of M112 will be required to cut an alloy steel shaft 22" in circumference? - ANSWER- not 5 How many packages of military dynamite (M1) are required to create a relieved-face crater that is 120 feet long? - ANSWER- not 1160 Using the minimum amount of explosives, how many total packages of C4 (M112) will be required to cut a mild steel bar that is 14 inches in circumference? - ANSWER- 3 How many one-pound packages of TNT are required to cut 90 trees 35 inches in diameter using an external charge? - ANSWER- 2790 Using the Hasty Method, what is the amount of M112 needed for an internal charge at the center of a 5-foot thick dense concrete wall? - ANSWER- not 9 Using a block charge, how many one-pound packages of TNT are required when your squad has been given the mission to cut eight steel I-beams with the dimensions of: flanges 15" x 1" thick and web 32" x 1"? - ANSWER- 192 How many packages of TNT are required to create a relieved-face crater that is 125 feet long? - ANSWER- 1230 Using the minimum amount of explosives, how many total packages of M112 are required to cut 17 trees, 24 inches in diameter? - ANSWER- 34 What is the correct DD form for preparing a breaching reconnaissance record? - ANSWER- DD 3020 Using the Hasty method, what is the total amount of M112 (in 1.25 lb. packages) needed for a ground placed untamped charge on a 6-foot thick first class masonry wall? - ANSWER- 206 Which of the following should the reconnaissance orders detail the reconnaissance party to determine? - ANSWER- firing system How many cratering charges and how many packages of M112 C-4 are needed to create a deliberate crater 105 feet long? - ANSWER- 29 cratering charges + 38 packages of M112 C-4 How many total pounds of TNT are required to create an abatis that has 72 trees with an average diameter of 30 inches? - ANSWER- 1296 How many packages of C4 (M112) are required to cut 14 trees with the average diameter of 29 inches using a ring charge? - ANSWER- 182 Using deck bridge, bottom support, method III, which method of attack is preferred on a concrete deck bridge when the supports and the total end clearance (E) is less than the required end clearance (ER)? - ANSWER- top attack How many pounds of TNT are required to create a hasty road crater 6 feet deep and 120 feet long? - ANSWER- 1320 What is the required end clearance (ER) for a steel-beam deck bridge which has the following measurements? H = 1.8m L = 35m - ANSWER- 0.24m Using an external timber cutting charge, how many one-pound packages of TNT are required to cut 100 trees with an average of 36 inches in diameter? - ANSWER- 3300 If the obstacle folder is unavailable, which report is used in its place? - ANSWERBreaching Reconnaissance Record How many 40-pound ammonium nitrate cratering charges and packages of C-4 are needed to destroy a bridge abutment that is 5 feet thick, 18 feet high, and 35 feet wide? - ANSWER- 6 CC and 12 packages of M112 What is the required length of span removed (LC) for a bowstring bridge, which has the following measurements? H = 8m L = 85m LS = 1.55m - ANSWER- 4.67m When using the breaching reconnaissance record, which block is used for general structure description? - ANSWER- Block 11 How many total pounds of TNT are required to construct a relieved-face road crater when the roadway width measures 41 feet? - ANSWER- 530 Using the minimum amount of explosives, how many packages of M112 will be required to cut an alloy steel shaft 24" around? - ANSWER- 8