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Logan 4th year > Faucets and Flushometers 060301i > Flashcards

Faucets and Flushometers 060301i Flashcards

1
Q

The body and working components of most quality residential faucets are predominantly manufactured from what?

A

Yellow brass

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2
Q

What’s another name that describes a 2 handle faucet?

A

Standard

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3
Q

What do standard (2 handle) faucets and single-lever faucets rely upon to maintain a set temperature and pressure at the outlet of the faucet?

A

Water pressure

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4
Q

Frost free hose bibs requiring cross-connection protection must be provided with what?

A

A self draining hose end vacuum breaker

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5
Q

Which faucets usually require the most maintenance?

A

Washer-style or compression faucets

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6
Q

Washer style faucets or compression faucets work on the principle of holding a seal or bibb washer over the opening to the faucet by means of what?

A

A screwed spindle or stem

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7
Q

Bibb washers or faucet washers in most faucets are made of what?

A

Neoprene composite material

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8
Q

What is the most common cause of water dripping from the spout of a compression style faucet?

A

Worn or hardened bibb washer

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9
Q

When a faucet drips for a long time due to a worn or hardened bibb washer what other problem can occur?

A

Water moving between the washer and the seat causes wire drawing of the brass seat

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10
Q

What is the only option when repairing a ceramic disk?

A

Must replace the whole thing

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11
Q

Shower valves must be set to not exceed what temperature?

A

120°F (49°C)

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12
Q

What are the 3 traditional types of flush valves?

A

Piston, diaphragm and metering

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13
Q

What fixture requires the use of only a metering style of flush valve?

A

Urinal

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14
Q

Most urinal flush valves require a minimum operating pressure of ___ psi and operate at a maximum of ___ psi

A

15, 80

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15
Q

What size flush valve outlet is required for a urinal?

A

3/4”

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16
Q

Metering valves typically require a minimum of ___ “ water supply piping while diaphragm and piston valves require a minimum ___” water supply

A

1/2, 3/4

17
Q

What is the minimum supply for a water closet flush valve?

A

1”

18
Q

What is the minimum outlet for a water closet flush valve?

A

11/2”

19
Q

What is the primary defence against cross connection in a flush valve?

A

Vacuum breaker

20
Q

A piston style flush valve that fails to close off after flushing would be an indication of what?

A

The pistons main seat has become damaged

21
Q

A faucet leaking from the handle is most likely caused by what?

A

Worn O-ring

22
Q

A piston flush valve on the most downstream water closet in a bank of toilets that doesn’t receive sufficient volume to flush solids would be an indication of what?

A

Urinal piston parts are installed accidentally

Water line is undersized

23
Q

In a diaphragm flushometer, what creates the seal between the upper and lower chambers as the flush cycle ends?

A

More force being exerted in the upper chamber due to a large area of diaphragm exposed to pressure holds the diaphragm in a closed position until pressure is relieved by the trip lever initiating the flush cycle

24
Q

What happens when you open the set screw on the top of a piston style flush valve?

A

Longer flush

25
Q

The o-rings on the top of a washerless cartridge prevent water from following where?

A

From the handle

26
Q

A diaphragm flush valve that fails to have a long enough flush will most likely be caused by what?

A

Bypass orifice is damaged and enlarged

27
Q

The length of flush for a urinal should be how long?

A

3-5 seconds

28
Q

What will happen to the length of flush of a piston flush valve should the adjustment screw be turned counter clockwise?

A

The length of flush will increase

29
Q

In an electronic flush valve if the length of flush is too short what action should be taken?

A

Replace the sensor module

30
Q

A diaphragm flush valve that creates a chattering sounds during flush would be an indication of what?

A

Diaphragm material damaged allowing high velocity water into the upper chamber

31
Q

A diaphragm flush valve that has an excessively long flush would be an indication of what?

A

Bypass is restricted not allowing the diaphragm to reset in proper time

32
Q

Which flushometer cannot be installed on a water closet?

A

Metering

33
Q

A continuously running pump should not be used on a high rise apartment complex for what reason?

A

It will overpressure the system during low demand periods

34
Q

What part of a flush valve prevents cross connection?

A

Atmospheric vacuum breaker

35
Q

What happens when you turn in the regulating screw on a diaphragm flush valve?

A

The flush will grow longer

Logan 4th year (9 decks)

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