UTB6 Plumbing Fixtures Flashcards
What are often called “driving equipment” because they are the primary source of mechanical energy or power? (Page 6-1)
Prime movers
Electric motors are fitted with what which reduce friction? (Page 6-3)
Bearings
Two fairly common types of drives used with electric motors are the flexible coupling and the what? (Page 6-4)
Belt drive
What is a machine that produces mechanical energy by burning fuel in a confined space (the engine cylinder)? (Page 6-5)
Internal combustion engine
The gasoline engine changes heat energy into what form of energy? (Page 6-7)
Mechanical
Most gasoline engines operate on what cycle? (Page 6-7)
Four-stroke
What are used to move any substance that flows or can be made to flow? (Page 6-9)
Pumps
The addition of energy to a liquid by a pump usually results in an increase in pressure, which is generally referred to as what? (Page 6- 9)
Head
Every pump is equipped with devices for controlling the direction of flow, the volume of flow, and the operating pressure of the pump. A device that performs one or more of these control functions is called a what? (Page 6-10)
Valve
A valve that permits liquid flow in only one direction is classified as a what? (Page 6-10)
Check valve
What valves are designed to open when the liquid pressure in the pump becomes dangerously high? (Page 6-11)
Relief
The five broad categories of pumps are rotary, reciprocating, centrifugal, air lift, and what else? (Page 6-11)
Jet pumps
What type of pump moves water or other liquid by means of a plunger or piston that reciprocates (travels back and forth) inside a cylinder? (Page 6-12)
Reciprocating
The reciprocating pumps used by the Navy are usually one of the following types-direct-acting, simplex, double-acting, or vertical. The types most often used are what type of pumps? (Page 6-13)
Direct acting
When a body, or a liquid, is made to revolve or whirl around a point, a force is created that impels the body or fluid to move outward from the center of rotation. What is this phenomenon called? (Page 6-16)
Centrifugal Force
When a centrifugal pump is being used with a suction lift of no more than how many feet is required, a pump with an automatic primer or a suction line equipped with a foot valve may be used? (Page 6-17)
15
In domestic water supply systems, the centrifugal pump is used in shallow wells (suction lift not over how many feet)? (Page 6-17)
22
Fire pumps usually are the centrifugal type, either single or multistage. Electricity, steam, or gasoline may drive them. Whatever the power supply, it must be permanent and, if steam, must have a constant minimum pressure of how many pounds of steam? (Page 6- 17)
50
What occurs when the velocity of a liquid increases to the point where the consequent pressure drop reaches the pressure of vaporization of the liquid? (Page 6-19)
Cavitation
What is a general term that refers to many different types of materials used to seal moving machinery joints (sliding pistons and piston rods, rotating shafts and valve stems, etc.) against leakage of steam or liquids? (Page 6-20)
Packing
Packing usually takes the form of coils, rings, or what else? (Page 6-21)
Spirals
Most water service pumps use what material for the seal faces? (Page 6-22)
Carbon
Mechanical seals should be replaced whenever the seal is removed for any reason or whenever the leakage rate exceeds how many drops per minute? (Page 6-22)
5
Pumps that use the rapid flow of a fluid to entrain another fluid and thereby move it from one place to another are what type? (Page 6-28)
Jet pumps
Standard pumps are normally packed before shipment. If the pump is installed within how many days after shipment, the packing should be in good condition with a sufficient supply of lubrication? (Page 6-33)
60
The maximum desirable operating temperature for bearings is what? (Page 6-35)
180° F
Grease-lubricated bearings should not be used where temperature of the pumped liquid exceeds what? (Page 6-35)
350°F
Packing should be checked frequently and replaced as service indicates. How many months might be a reasonable expected life, depending on operating conditions? (Page 6-37)
Six
A mechanical seal that has been used should not be placed back into service until the sealing faces have been replaced or relapped. (Relapping is generally economical only in seals that are how many inches and greater in size?) (Page 6-37)
2
What are placed between the stages or cylinders of multistage compressors cooling the compressed air charge before it is drawn into the next cylinder? (Page 6-47)
Intercoolers
Compressed air usually falls into one of three categories-power service, process service, or what else? (Page 6-49)
Control purposes
What is when compressed air either moves something or exerts a force? (Page 6-49)
Power service
What is when compressed air is used to govern and/or regulate various equipment by monitoring pressure or flow rates of some substance? (Page 6-49)
Control purpose
Medium-pressure compressed air systems deliver air from 126 to what psig? (Page 6-49)
399
High-pressure compressed air systems range from 400 to what psig? (Page 6-49)
6,000
What are provided on compressor intakes to prevent atmospheric dust from entering the compressor and causing scoring and excessive wear? (Page 6-50)
Air filters
What remove moisture from compressed air that would condense in air lines, air tools, and pneumatic instruments? (Page 6-51)
Dryers
Immediately secure a compressor when the temperature of the air discharge from any stage rises unduly or exceeds what? (Page 6-53)
400°F
What two types of urinals are most commonly used by the Seabees?
Floor- and wall-mounted
When thawing frozen water pipes or heating pipes inside buildings, which method is preferred?
Hot water
What is the most common reason a threaded pipe joint will leak?
Fractured pipe
The mechanisms used to transport body wastes into a sanitary sewer system are known as what type of fixtures?
Plumbing
Liquid waste is discharged through which piece of equipment?
Orifice
What type of hold-down bolts are used in the installation of water closets?
Brass
How is a wall-mounted water closet attached to a wall?
Chair carrier
Which piece of equipment associated with water closets carries the weight of the entire closet independent of the walls?
Hold-down flange
What item is not required to be installed on a water closet if a flush valve is used?
Tank
Which application is best suited for flush valve usage?
Commercial
What item is installed on the supply line of a float valve in a water closet tank if the outlet is below the flood level rim?
Back flow preventer
What shuts off the flushing water during a flushing cycle?
Water pressure passing through the upper chamber
The lip of the wall mounted urinal is how many inches from the floor?
20-25”
What is the minimum diameter, in inches, of a drain used for wall-hung urinals?
2
Along with the kitchen sink, which other sink is most commonly installed?
Slop sink
As a rule of thumb, the distance between the top of the drain board of a kitchen sink and the finished floor should not be less than how many inches?
36”
A service sink is also known as what?
Slop
What type of faucet is used where outside hose connections are needed?
Hose bib
What is the main feature of a combination faucet?
Capability of the water to be tempered
When you are facing the tub and the drain is on the right end, what type of tub is it?
Right handed
What piece of equipment allows water flow from the shower head when the faucet is turned on?
Diverter
When installing a bathtub/shower combination plumbing fixture, where should you place the bathtub spout ?
2 to 4 inches above rim of tub
Thermostatic mixing valves are only used in which plumbing fixture?
Showers only
How many types of shower heads are generally used when installing a shower?
2
Which shower head has a restricted nozzle?
Economy
The sides of the pan that are against the shower walls must be how many inches above the height of the finished dam or threshold?
3
True or False) The shower head should be a minimum of 68 inches above the level of the drain on the shower pan.
TRUE
How many inches above the floor should the orifice of a drinking fountain be located?
30 to 40
Floor drains used in connection with a sanitary sewer must contain what piece of equipment?
Water seal
A floor drain that is 2 inches is rated at how many drainage fixture units?
2
Where is the combustion chamber in a water heater located?
Lower section
Where are the cold and warm water inlets located on a water heater?
Top of the tank
On a gas water heater, at what temperature, in degrees, does the relief valve open?
210° F
Wooden plugs can also be used temporarily to plug the ends of a pipe up to how many inches in diameter?
8”
What is the first step before starting to thaw a frozen pipe?
Open all faucets affected by the freeze.
Where is the heat applied to commence thawing operations?
Lowest open end
Which thawing application is the quickest and cheapest?
Electrical
Steam thawing is used dependent upon what condition?
Type of insulating material inside piping.
What can cause low water pressure and flow in piping?
Liming
What type of valve will correct the problem of shower pressure dropping when other fixture outlets are opened?
Automatic mixing valve
Fractures often occur at which location of a pipe?
End
What is installed after a section of copper piping is replaced for a leak?
Compression type joint
What is the first step when making a temporary repair on a pipe using a rubber hose?
Turn off water supply
Moisture on the floor at the base of a water closet indicates the failure of what part?
Seal gasket
What opens the inlet valve on a water closet flushing cycle?
Movement of float arm
What assembly is the likely cause for water to continue to run in a water closet even after the flushing cycle is completed?
Flush tank/ inlet valve
What causes the diaphragm to remain seated on the seat?
Upper and lower chambers contain the same amount of pressure.
How is the piston type flushometer opened?
Lever which discharges water from dashpot chamber is engaged.
(True or False) When pipelines in a new installation are not thoroughly flushed before placed in operation, the pipe dope or dirt contained in them can stop up the discharge valve.
TRUE
What is the most common cause of a dripping faucet?
Stem washer is worn down.
When flushing a sewer line with a fire hose, what size fire hose is preferred for use?
2-1/2”
Sewer cleaning machines are designed for use in pipelines up to how many feet in length?
200
Which chemical is added to a sewer pipeline in the attempt to remove tree roots?
Copper sulfate (Blue vitriol)
What type of material needs to encase a sewer line that passes under roadways?
Concrete
(True or False) Excavations over 5 feet must be shored and ladders provided.
TRUE
Which tool is commonly used for clearing stoppages in service sinks?
Force cup
Trap and drain augers are also known as what?
Sink snake
What type of snake is used to clear floor drains?
Spring snake
Which chemical is used to burn out stoppages?
Potassium hydroxide
Which chemical is used to clear stoppages in kitchen sinks?
Hydrochloric acid
What piece of equipment is not required for an electric heater?
Flue
What is the diameter, in inches, of the cold water inlet for an electric inlet?
3/4”
The temperature and pressure relief on an electric heater is set to lift at what pressure, in psi?
125 psi
All gas water heaters are tested to operate at what pressure, in psi?
300
By what means is the pilot light adjusted on a gas water heater?
Air shutter
What type of fittings is used when installing copper water lines?
Dielectric
CPVC piping can withstand temperatures up to how many degrees?
180
What is the minimum diameter, in inches, of steel piping used for a gas line?
1/2”
What is the minimum size drain, in inches, used for a lavatory installation?
1-1/4”
How many types of joints are associated with flexible supply lines for lavatories?
3
Where on a water closet is the trap located when the water closet uses a reverse trap flushing action?
Rear
(True or False) Water closets equipped with a tank require a 3/4-inch waterline.
False1/2”
What is the required waterline size, in inches, for a water closet equipped with a flushometer?
1”
Which is NOT a type of urinal?A. GangB. Wall-hungC. StallD. Trough
A. Gang
How many different designs are associated with the wall-hung type urinal?
3
By what means is the pedestal urinal sealed to the floor flange?
Wax ring
What type of trap is installed on siphon jet urinals?
Integral
What is the minimum diameter, in inches, of a drain used for wall-hung urinals?
2”
What component prevents contaminated water from being siphoned into the potable water supply through the flushometer?
Vacuum breaker
What is the average time, in seconds, of a flush cycle?
7 - 10
The sides of the pan that are against the shower walls must be how many inches above the height of the finished dam or threshold?
3
