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Free 50 Question Practice Firefighter Exam - Questions 41-50
41. The Metroland Fire Department responded to 12,486 fires during the year. it has been concluded from the Fire Prevention Bureau that 27% of those fires were categorized as preventable. What is the number of fires that could have been prevented?
A)3,371
B)9,115
C)1,972
D)4,543
42. 8-3/4 divided by 2-1/2 =
A)1-7/8
B)3-1/8
C)3-1/2
D)4-1/10
For question 43, find the numerical value of the following expression when a = 6, b = 5, c = 4, m = 3, n = 2
43. b / (4 + mn)
A).5
B).85
C).3
D)1.5
Friction loss (FL) is the resistance encountered by the free flow of water in a fire hose. As a hose is used to move water from a source to a fire, its movement is hindered by the friction of water upon the hose. As a consequence, the velocity of the stream is constantly decreased by this friction as it moves through the hose. Friction loss is usually computed in terms of the drop in discharge pressure that occurs between the pumper truck and the hose nozzle in pounds per square inch (psi). The following formulas are used to calculate friction loss, in psi, for different size hoses. In each case, the formula gives the friction loss in psi per 100 feet of hose.
Friction loss per 100 feet of 1-1/2 inch hose: Drop the last digit form the gallons per minute (gpm) flowing through the hose, square the remaining value and then divide by three. For example, a 100 foot length of 1.5 inch hose with a 40 gpm nozzle would have a friction loss of: (4 x 4)/3 = 5.3, or approximately 5 psi.
Friction loss per 100 feet of 2-1/2 inch hose (2 x Q² + Q): FL = 2(Q x Q) + Q, where Q = gpm/100.
Friction loss per 100 feet of 3 inch hose (.8 x Q² + 1): FL = .8(Q x Q) + 1, where Q = gpm/100 = Q
When two or more equal sized lines are running from the same source, divide the gpm by the number of supply lines and use the appropriate formulas above.
Based on the information above, determine the approximate friction loss in psi for questions 44-46:
44.100 ft of 2-1/2 inch hose at 200 gpm:
A)7
B)10
C)6
D)23
45. 400 ft of 1-1/2 inch hose at 90 gpm:
A)17
B)82
C)108
D)125
E)92
46. 100 ft of 3 inch hose at 400 gpm:
A)15.3
B)16.7
C)13.8
D)21.7
E)41.4
47. If one gallon of water weighs 8.35 pounds, how many gallons of water would weigh 16,000 pounds?
A)2,016
B)1,916
C)3,428
D)2,874
E)None
48. ² - 2n
A)7
B)9
C)6
D)21
49. 5% of 20 =
A).01
B)0.1
C)1.0
50.Captain Edward Johnson recently purchased the following material in preparation for a first responder seminar concerning medical emergencies: $11.27 for paper; $2.93 for pencils/pens; $1.41 for chalk; $13.87 for folders; and $4.92 for transparencies. If the class is given over a 5-day period, what would be the average cost each day?
A)$6.88
B)$6.93
C)$7.11
Answers to the Free 50 Question Practice Firefighter Exam
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