ASSIGNMENT 3
Textbook Assignment: "JP-5 Afloat Below Deck Systems and Operations (continued),"
chapter 4, pages 4-13 through 4-65.
3-1.
The centrifugal pump used in the
3-6.
JP-5 service system is rated at
what capacity?
1.
20 gpm
2.
150 gpm
3.
1,100 gpm
4.
1,500 gpm
3-2.
The centrifugal pump casing is
3-7.
divided into how many chambers?
1.
One discharge and two suction
2.
One suction and two discharge
3.
Two discharge and two suction
4.
One discharge and one suction
3-3.
The centrifugal pump has four
3-8.
wearing rings. Two wearing rings
are installed in the pump casing
between the suction and discharge
chambers. Where are the other two
wearing rings installed?
1.
On the pump shaft
2.
In the discharge chamber
3.
In the suction chamber
3-9.
4.
On the impeller
3-4.
What is the purpose of wearing
rings?
1.
To act as bearings for the pump
shaft
2.
To minimize leakage between the
suction and discharge chambers
3.
To allow for the wear created
3-10.
between the impeller and pump
casing
4.
Both 2 and 3 above
3-5.
The centrifugal pump impeller is
centered and secured in the pump
casing by what devices?
1.
Shaft sleeves and wearing rings
2.
Shaft sleeves and shaft nuts
3.
Bearing caps and shaft nuts
4.
Bearing caps and shaft sleeves
What devices prevent fuel from
leaking out of the pump case around
the pump shaft?
1.
Mechanical seals
2.
Shaft collars
3.
Flinger rings
4.
All of the above
Mechanical seals are used because
of their durability and will not
often break, even if they are
dropped on a hard surface.
1.
True
2.
False
The ball bearings on the
centrifugal pump shaft are
lubricated by what means?
1.
The circulating JP-5
2.
Self-priming oil pump
3.
Grease fittings
4.
Oil reservoir
Rotary vane pumps used for
stripping are designed to pump
approximately how many gallons per
minute and at what pressure?
1.
50 gpm at 25 psi
2.
50 gpm at 50 psi
3.
200 gpm at 25 psi
4.
200 gpm at 50 psi
Rotary vane pumps used for
transferring are designed to pump
approximately how many gallons per
minute at what pressure?
1.
50 gpm at 25 psi
2.
50 gpm at 50 psi
3.
200 gpm at 25 psi
4.
200 gpm at 50 psi
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