DRIVER OPERATOR CHAPTER 11 -
STATIC WATER SUPPLY SOURCES -
EXAM PREP WITH CORRECT
SOLUTIONS
During drafting, which of the following results in water being forced into the hose and
pump because of a partial vacuum created in the pump?
A. Pressure in the intake hose and pump ceases.
B. Pressure in the intake hose and pump equals atmospheric pressure.
C. Pressure in the intake hose and pump drops lower than atmospheric pressure.
D. Pressure in the intake hose and pump increases higher than atmospheric
pressure. - ANSWER-C. Pressure in the intake hose and pump drops lower than
atmospheric pressure.
If water does not rise to the level of the pump intake, drafting:
A. will not be possible.
B. will take much longer.
C. can occur only if on an uphill slope.
D. can occur only if on a downhill slope. - ANSWER-A. will not be possible.
Which of the following can be calculated by determining actual atmospheric pressure
of an area and multiplying that number by the water's pressure per square foot (kPa)
while it is in the intake hose?
A. Minimum lift
B. Maximum lift
C. Theoretical lift
D. Dependable lift - ANSWER-C. Theoretical lift
Which of the following BEST defines the dependable lift that every operating fire
pump should have?
A. Exactly 10 feet (3 m).
B. At least 14.7 feet (4.5 m)
C. At least 17.6 feet (5.5 m)
D. At least 20.5 feet (6 m) - ANSWER-B. At least 14.7 feet (4.5 m)
Which of the following must account for all factors that contribute to the amount of
work required by a pump to produce a fire stream?
A. Minimum lift
B. Dependable lift
C. Primary intake pressure
D. Net pump discharge pressure - ANSWER-D. Net pump discharge pressure
, Which of the following is the customary formula for pressure correction?
A. Lift plus total intake hose friction loss divided by 2.3
B. Lift plus total intake hose friction loss divided by 4.2
C. Lift plus total intake hose friction loss multiplied by 2.3
D. Lift plus total intake hose friction loss multiplied by 4.2 - ANSWER-A. Lift plus total
intake hose friction loss divided by 2.3
Which of the following is the level at which pumpers cannot be expected to draft
water?
A. 9.8 feet (3 m) below the level of the pump
B. 19.6 feet (6 m) below the level of the pump
C. 33.9 feet (10 m) below the level of the pump
D. 39.4 feet (12 m) below the level of the pump - ANSWER-C. 33.9 feet (10 m)
below the level of the pump
Which of the following is the greatest height to which any amount of water may be
raised through an intake hose to the pump?
A. Maximum lift
B. Theoretical lift
C. Dependable lift
D. Operational lift - ANSWER-A. Maximum lift
Which of the following is closest to describes maximum lift in most circumstances?
A. 10 feet (3 m)
B. 25 feet (7.5 m)
C. 30 feet (9 m)
D. 35 feet (10.5 m) - ANSWER-B. 25 feet (7.5 m)
Which of the following occurs as the point of maximum lift is approached?
A. The volume of water available for the fire pump is too variable.
B. The volume of water available for the fire pump remains constant.
C. The volume of water available for the fire pump increases significantly.
D. The volume of water available for the fire pump may be too low to be of value for
fire suppression. - ANSWER-D. The volume of water available for the fire pump may
be too low to be of value for fire suppression.
In general, which of the following is the driver/operator MOST concerned with?
A. Minimum lift
B. Maximum lift
C. Theoretical lift
D. Dependable lift - ANSWER-D. Dependable lift
Which of the following is the formula for net pump discharge pressure at draft?
STATIC WATER SUPPLY SOURCES -
EXAM PREP WITH CORRECT
SOLUTIONS
During drafting, which of the following results in water being forced into the hose and
pump because of a partial vacuum created in the pump?
A. Pressure in the intake hose and pump ceases.
B. Pressure in the intake hose and pump equals atmospheric pressure.
C. Pressure in the intake hose and pump drops lower than atmospheric pressure.
D. Pressure in the intake hose and pump increases higher than atmospheric
pressure. - ANSWER-C. Pressure in the intake hose and pump drops lower than
atmospheric pressure.
If water does not rise to the level of the pump intake, drafting:
A. will not be possible.
B. will take much longer.
C. can occur only if on an uphill slope.
D. can occur only if on a downhill slope. - ANSWER-A. will not be possible.
Which of the following can be calculated by determining actual atmospheric pressure
of an area and multiplying that number by the water's pressure per square foot (kPa)
while it is in the intake hose?
A. Minimum lift
B. Maximum lift
C. Theoretical lift
D. Dependable lift - ANSWER-C. Theoretical lift
Which of the following BEST defines the dependable lift that every operating fire
pump should have?
A. Exactly 10 feet (3 m).
B. At least 14.7 feet (4.5 m)
C. At least 17.6 feet (5.5 m)
D. At least 20.5 feet (6 m) - ANSWER-B. At least 14.7 feet (4.5 m)
Which of the following must account for all factors that contribute to the amount of
work required by a pump to produce a fire stream?
A. Minimum lift
B. Dependable lift
C. Primary intake pressure
D. Net pump discharge pressure - ANSWER-D. Net pump discharge pressure
, Which of the following is the customary formula for pressure correction?
A. Lift plus total intake hose friction loss divided by 2.3
B. Lift plus total intake hose friction loss divided by 4.2
C. Lift plus total intake hose friction loss multiplied by 2.3
D. Lift plus total intake hose friction loss multiplied by 4.2 - ANSWER-A. Lift plus total
intake hose friction loss divided by 2.3
Which of the following is the level at which pumpers cannot be expected to draft
water?
A. 9.8 feet (3 m) below the level of the pump
B. 19.6 feet (6 m) below the level of the pump
C. 33.9 feet (10 m) below the level of the pump
D. 39.4 feet (12 m) below the level of the pump - ANSWER-C. 33.9 feet (10 m)
below the level of the pump
Which of the following is the greatest height to which any amount of water may be
raised through an intake hose to the pump?
A. Maximum lift
B. Theoretical lift
C. Dependable lift
D. Operational lift - ANSWER-A. Maximum lift
Which of the following is closest to describes maximum lift in most circumstances?
A. 10 feet (3 m)
B. 25 feet (7.5 m)
C. 30 feet (9 m)
D. 35 feet (10.5 m) - ANSWER-B. 25 feet (7.5 m)
Which of the following occurs as the point of maximum lift is approached?
A. The volume of water available for the fire pump is too variable.
B. The volume of water available for the fire pump remains constant.
C. The volume of water available for the fire pump increases significantly.
D. The volume of water available for the fire pump may be too low to be of value for
fire suppression. - ANSWER-D. The volume of water available for the fire pump may
be too low to be of value for fire suppression.
In general, which of the following is the driver/operator MOST concerned with?
A. Minimum lift
B. Maximum lift
C. Theoretical lift
D. Dependable lift - ANSWER-D. Dependable lift
Which of the following is the formula for net pump discharge pressure at draft?
