PP PB

100問 • 1ヶ月前

問題一覧

To minimize the threat of polluting a well, the casing is _____.

Grouted

It produces small current when heated. It also acts as a safety component of the burner.

thermocouple

A type of pipe reamer used to remove the internal and external burrs of a pipe, usually applicable on plastic and other thin-walled pipe or tubing.

Combination pipe reamer

A type of shovel used for general digging. Penetrates moist clays and sands.

round pointed shovel

Why is bronze material typically used in screwed bonnet for valves?

Bronze is ductile and corrosion-resistant

A specialty plumbing tool with a rotating, self-adjusting gripping head and long handle. It is used to tighten and remove the mounting nuts of faucet tailpieces.

basin wrench

_____ comes in coils of 60 or 100 feet. Types of K and L can be used above and below ground. Both types have the advantage of bending tool for installation.

Flexible Copper Tubing

Which of the following is an applicable requirement for a vent installed horizontally with a minimum of 6 inches above the flood level rim of the fixture?

The size of vent piping shall be determined from its length and total number of fixture units connected

Where does the soldering of a rigid copper tubing joint require the torch heat to be placed?

fitting

What do you call the valve installed at the end of a pump to prevent the loss of prime of the pump?

foot valve

Which of the following processes is used to remove dissolved gases, such as oxygen and carbon dioxide, from liquids in order to prevent corrosion and improve process efficiency?

Deaeration

Calculate the total WSFU, if WC= 5 and Lavatory = 2.

14 wsfu

Letter D indicates _____.

Cold water line for fixture

Which is not true about solar water heating system?

An open-loop system is suitable for areas prone to freezing

The operating nut in a valve is not turning in either direction. Which of the following is not a probable cause of this problem?

Excessive pressure holds down the nut

Is a valve installed on water service to turn on or off the flow of potable water in the building

Curb Cock

Minimum thickness of vent connector shall be at least _____.

0.345 mm

Best pipe for corrosion resistance

stainless steel

The estimated gray water flows of each occupant per day

40 gallons

A concrete restraint utilized to prevent pipe joints from separating under the force carried fluids.

thrust block

Welded Cap

Tool D

A heavy sprocket chain that is slipped around a pipe, then attached to wrench handled and used on piping work especially large size pipe metal pipes and in areas that is not easily accessible

chain wrench

A 15-meter pipe is to be divided into sections using 3-m long pipes. How many 3-m long pipes and fittings are needed for their connection?

5 pipes, 4 fittings

This component can ensure water-tight seal between the urinal and flush valve.

spud gasket

Which is true regarding the plumbing installation in the elevator shaft?

Plumbing systems shall not be located in an elevator shaft.

Exposed Back Spud for Water Closet

What valve regulates the intake of gravity tank?

float valve

This is used as a source of heat when melting lead and heating the soldering copper for pipe jointing.

Blow torch

The center of a drain that serves a 12” rough toilet installed along a wall with 1⁄2” drywall ____.

is roughed in at 12 1⁄2” from the wall stud

How do you join medical gas piping?

silver brazes

In what instances that a mechanical drainage will be used?

Drainage cannot be affected by gravity

A branch serves 6 stacks connected via a tee. Each stack terminates to a lavatory requiring 1 p-trap, and waste arm. Find the total number of fixtures and fittings.

distribution line

An interceptor must have a clearance above it that is _____.

greater than the height of the internal removable baffle

If a grease interceptor is found inside a kitchen, what shall be done?

Recommend relocating it outside to avoid sanitation issues and make maintenance easier.

This describes the putting of pipe and fittings together without making a permanent joint for the purpose of checking the feasibility of an installation.

Dry fitting

Water Closet (Flush Valve, Wall-Hung)

It has un-serrated jaws, used to turn fittings of minimum strength, such as copper and brass valve and drain trap fitting or sinks and lavatories.

Adjustable Spud Wrench

If there is a problem with spa jet to make the warm water ideal for the user, which is the most appropriate troubleshooting procedure?

Setting the air intake to more appropriate setting

How much thread must you extend beyond the die stock to completely thread the pipe's end?

1/4 inch

What would be the probable cause of a water closet leak of the floor connection?

seating seal is not holding against the heavy discharge pressure of each flush

Scoop Shovel

For a leaking concrete water tank due to crack, which of the following repair material is most suitable and economical to seal the crack without disrupting the water supply of the building?

water plug

Which of the following is not a green building initiative?

high flush toilets

What type of steel pipe is manufactured without any welding joints by extruding a billet through a die?

Seamless Pipe

What is the minimum size of a fire hose outlet of an interior wet standpipe?

38 mm

A sudden valve closure in one branch of a pipeline system has inflicted water hammer in other branches as well. What is the explanation for this phenomenon?

fluid compressibility

Leaks in gas piping shall be, in the most practical way, located by applying _____.

soapy water to the exterior of the piping

For globe valves which has leak at the stem and packing nut, the best thing to do is ____.

set in the new packing

Float Valve

A backflow caused by a negative pressure (i.e., a vacuum or partial vacuum) in a public water system or consumer’s potable water system. The effect is similar to drinking water through a straw.

Backsiphonage

To boost the water pressure of hot water, use _____.

circulating pump

Surfaces to be joined by soldering or brazed shall be cleaned bright by _____.

mechanical or manual means

For ordinary hazards, what is the maximum spacing between sprinklers?

4.6 m

Tighten the fitting by using two _____.

Wrenches

1 Fixture unit rate of flow is nearest equivalent to?

30 quarts per minute

A lamination of brown (kraft) paper, fiberglass cloth (skrim) and a metallic film. A vapor barrier is also included. It is most often used to cover fiber-glass insulation.

All-Service Jacket

Plumbing pipe color coded in aqua-blue stripe or band is identified as what pipe?

potable water pipe

3 pieces

What is the kind of hammer usually used and most suitable for a pipe fitter?

Ball Peen hammer

Coupling

How many turns does it take to operate an 8" double-disk valve?

Vacuum Cleaning

One of the first steps in the selection of a suitable water supply source.

Potability

In a high-rise building with a pressurized gas line, where do you need to boost the pressure for the gas supply?

lowest floor

Which of the following is not true about PEX?

The joints allowed for PEX are mechanical joints and heat fusion.

A child’s water child’s water closet has a rim height of closet has a rim height of ________ above the floor. Many plumbing codes require these water closets in daycare centers and kindergarten toilet rooms for use by small children.

10 inches

What is the main use of chain wrench?

to turn or hold steel pipes

These rainwater pipe shapes may be used and are considered when enclosing an inscribed circle equivalent to the drain leader diameter, except _____.

semi-circular

Pipe Extractor

What should be done after cutting a copper?

reaming

A horizontal drainpipe has an existing load of 30 fixture units. After adding a new discharge pipe from an ejector rated at 60 gpm, the total load on the horizontal drainpipe will be how many FU?

150

In a company, who is in-charge as infection control officer?

pollution control officer

A drain connecting the compartments of a set of fixtures to a trap or connecting other permitted fixtures to a common trap.

Continuous waste

Which is not prohibited in an elevator shaft or equipment room?

Sprinkler

A tank that is used so that the pneumatic tank or other pump sucks the water from this tank and not the public main, so that it will not deprive the neighbors of water due to pressure.

Suction Tank

The principal function of expansion tank in a hot water system.

Lets thermal expansion of water to maintain working pressure

A drainage cleaner that uses high-pressure to remove clogs

jetter

What would you inspect 2 days after clearing clog from sink if it is still draining slowly?

Vent

Which of the following are considered the best two pipe materials for medical vacuum systems in healthcare facilities?

Copper and Stainless Steel

What is a valve which regulates water pressure from the water main?

Pressure Sustaining Valve

Installation of water service must be direct and in short manner. Possible turns or offset elbows should be avoided because the element will incur _____.

friction losses

Reciprocating saw blades are selected based on the type of material being cut, length, and?

teeth per inch

The rule of thumb for tightening pipe threads and compression fitting is hand-tightened plus _____ turn/s with wrench.

1 to 2

In cutting a copper pipe tubing or other thin-walled pipe materials, what is an important consideration?

To apply even pressure and rotate the pipe

A cylindrical tank which is a connection point by which fire fighters can tap into a water supply.

fire hydrant

Which is not true about copper joints?

swaging tool is used for flared joints

A pump capable of generating 125 feet of head of gasoline would provide a pressure of _____.

37.8 psig

In a medium-sized food establishment with a seating capacity of 15 persons, what is the recommended combination of plumbing fixtures?

Kitchen sink, dishwasher, grease interceptor

This is used to remove square and octagonally-shaped threaded faucets. It has a right angle bar with one end for square nuts and other octagonal.

Valve seat wrench

Elbow Turned Up (Flanged)

Which of the following listed fitting do not have the similar function?

Plug

A handheld shower hose that could be submerged in bath water must _____.

always have a backflow prevention device installed

How many bolt holes are there in a Class 150 pipe flange that is 100 mm in diameter?

What is the most probable cause of slow flushing of the water closet?

lack of water in the tank

Maximum length of nipple fitting

12"

100

5 standpipes deliver a total of 250 gpm flow rate. What is the total residual pressure at the outlets if each standpipe has 1 outlet?

981 kpa

MT 4

MT 4

MT 5

MT 5

MT 6

MT 6

MT 7

MT 7

PC PB

ユーザ名非公開 · 100問 · 1ヶ月前

PC PB

100問 • 1ヶ月前

ユーザ名非公開

SP PB

ユーザ名非公開 · 100問 · 1ヶ月前

SP PB

100問 • 1ヶ月前

ユーザ名非公開

問題一覧

To minimize the threat of polluting a well, the casing is _____.

Grouted

It produces small current when heated. It also acts as a safety component of the burner.

thermocouple

A type of pipe reamer used to remove the internal and external burrs of a pipe, usually applicable on plastic and other thin-walled pipe or tubing.

Combination pipe reamer

A type of shovel used for general digging. Penetrates moist clays and sands.

round pointed shovel

Why is bronze material typically used in screwed bonnet for valves?

Bronze is ductile and corrosion-resistant

A specialty plumbing tool with a rotating, self-adjusting gripping head and long handle. It is used to tighten and remove the mounting nuts of faucet tailpieces.

basin wrench

_____ comes in coils of 60 or 100 feet. Types of K and L can be used above and below ground. Both types have the advantage of bending tool for installation.

Flexible Copper Tubing

Which of the following is an applicable requirement for a vent installed horizontally with a minimum of 6 inches above the flood level rim of the fixture?

The size of vent piping shall be determined from its length and total number of fixture units connected

Where does the soldering of a rigid copper tubing joint require the torch heat to be placed?

fitting

What do you call the valve installed at the end of a pump to prevent the loss of prime of the pump?

foot valve

Which of the following processes is used to remove dissolved gases, such as oxygen and carbon dioxide, from liquids in order to prevent corrosion and improve process efficiency?

Deaeration

Calculate the total WSFU, if WC= 5 and Lavatory = 2.

14 wsfu

Letter D indicates _____.

Cold water line for fixture

Which is not true about solar water heating system?

An open-loop system is suitable for areas prone to freezing

The operating nut in a valve is not turning in either direction. Which of the following is not a probable cause of this problem?

Excessive pressure holds down the nut

Is a valve installed on water service to turn on or off the flow of potable water in the building

Curb Cock

Minimum thickness of vent connector shall be at least _____.

0.345 mm

Best pipe for corrosion resistance

stainless steel

The estimated gray water flows of each occupant per day

40 gallons

A concrete restraint utilized to prevent pipe joints from separating under the force carried fluids.

thrust block

Welded Cap

Tool D

A heavy sprocket chain that is slipped around a pipe, then attached to wrench handled and used on piping work especially large size pipe metal pipes and in areas that is not easily accessible

chain wrench

A 15-meter pipe is to be divided into sections using 3-m long pipes. How many 3-m long pipes and fittings are needed for their connection?

5 pipes, 4 fittings

This component can ensure water-tight seal between the urinal and flush valve.

spud gasket

Which is true regarding the plumbing installation in the elevator shaft?

Plumbing systems shall not be located in an elevator shaft.

Exposed Back Spud for Water Closet

What valve regulates the intake of gravity tank?

float valve

This is used as a source of heat when melting lead and heating the soldering copper for pipe jointing.

Blow torch

The center of a drain that serves a 12” rough toilet installed along a wall with 1⁄2” drywall ____.

is roughed in at 12 1⁄2” from the wall stud

How do you join medical gas piping?

silver brazes

In what instances that a mechanical drainage will be used?

Drainage cannot be affected by gravity

A branch serves 6 stacks connected via a tee. Each stack terminates to a lavatory requiring 1 p-trap, and waste arm. Find the total number of fixtures and fittings.

distribution line

An interceptor must have a clearance above it that is _____.

greater than the height of the internal removable baffle

If a grease interceptor is found inside a kitchen, what shall be done?

Recommend relocating it outside to avoid sanitation issues and make maintenance easier.

This describes the putting of pipe and fittings together without making a permanent joint for the purpose of checking the feasibility of an installation.

Dry fitting

Water Closet (Flush Valve, Wall-Hung)

It has un-serrated jaws, used to turn fittings of minimum strength, such as copper and brass valve and drain trap fitting or sinks and lavatories.

Adjustable Spud Wrench

If there is a problem with spa jet to make the warm water ideal for the user, which is the most appropriate troubleshooting procedure?

Setting the air intake to more appropriate setting

How much thread must you extend beyond the die stock to completely thread the pipe's end?

1/4 inch

What would be the probable cause of a water closet leak of the floor connection?

seating seal is not holding against the heavy discharge pressure of each flush

Scoop Shovel

For a leaking concrete water tank due to crack, which of the following repair material is most suitable and economical to seal the crack without disrupting the water supply of the building?

water plug

Which of the following is not a green building initiative?

high flush toilets

What type of steel pipe is manufactured without any welding joints by extruding a billet through a die?

Seamless Pipe

What is the minimum size of a fire hose outlet of an interior wet standpipe?

38 mm

A sudden valve closure in one branch of a pipeline system has inflicted water hammer in other branches as well. What is the explanation for this phenomenon?

fluid compressibility

Leaks in gas piping shall be, in the most practical way, located by applying _____.

soapy water to the exterior of the piping

For globe valves which has leak at the stem and packing nut, the best thing to do is ____.

set in the new packing

Float Valve

A backflow caused by a negative pressure (i.e., a vacuum or partial vacuum) in a public water system or consumer’s potable water system. The effect is similar to drinking water through a straw.

Backsiphonage

To boost the water pressure of hot water, use _____.

circulating pump

Surfaces to be joined by soldering or brazed shall be cleaned bright by _____.

mechanical or manual means

For ordinary hazards, what is the maximum spacing between sprinklers?

4.6 m

Tighten the fitting by using two _____.

Wrenches

1 Fixture unit rate of flow is nearest equivalent to?

30 quarts per minute

A lamination of brown (kraft) paper, fiberglass cloth (skrim) and a metallic film. A vapor barrier is also included. It is most often used to cover fiber-glass insulation.

All-Service Jacket

Plumbing pipe color coded in aqua-blue stripe or band is identified as what pipe?

potable water pipe

3 pieces

What is the kind of hammer usually used and most suitable for a pipe fitter?

Ball Peen hammer

Coupling

How many turns does it take to operate an 8" double-disk valve?

Vacuum Cleaning

One of the first steps in the selection of a suitable water supply source.

Potability

In a high-rise building with a pressurized gas line, where do you need to boost the pressure for the gas supply?

lowest floor

Which of the following is not true about PEX?

The joints allowed for PEX are mechanical joints and heat fusion.

10 inches

What is the main use of chain wrench?

to turn or hold steel pipes

These rainwater pipe shapes may be used and are considered when enclosing an inscribed circle equivalent to the drain leader diameter, except _____.

semi-circular

Pipe Extractor

What should be done after cutting a copper?

reaming

A horizontal drainpipe has an existing load of 30 fixture units. After adding a new discharge pipe from an ejector rated at 60 gpm, the total load on the horizontal drainpipe will be how many FU?

150

In a company, who is in-charge as infection control officer?

pollution control officer

A drain connecting the compartments of a set of fixtures to a trap or connecting other permitted fixtures to a common trap.

Continuous waste

Which is not prohibited in an elevator shaft or equipment room?

Sprinkler

A tank that is used so that the pneumatic tank or other pump sucks the water from this tank and not the public main, so that it will not deprive the neighbors of water due to pressure.

Suction Tank

The principal function of expansion tank in a hot water system.

Lets thermal expansion of water to maintain working pressure

A drainage cleaner that uses high-pressure to remove clogs

jetter

What would you inspect 2 days after clearing clog from sink if it is still draining slowly?

Vent

Which of the following are considered the best two pipe materials for medical vacuum systems in healthcare facilities?

Copper and Stainless Steel

What is a valve which regulates water pressure from the water main?

Pressure Sustaining Valve

Installation of water service must be direct and in short manner. Possible turns or offset elbows should be avoided because the element will incur _____.

friction losses

Reciprocating saw blades are selected based on the type of material being cut, length, and?

teeth per inch

The rule of thumb for tightening pipe threads and compression fitting is hand-tightened plus _____ turn/s with wrench.

1 to 2

In cutting a copper pipe tubing or other thin-walled pipe materials, what is an important consideration?

To apply even pressure and rotate the pipe

A cylindrical tank which is a connection point by which fire fighters can tap into a water supply.

fire hydrant

Which is not true about copper joints?

swaging tool is used for flared joints

A pump capable of generating 125 feet of head of gasoline would provide a pressure of _____.

37.8 psig

In a medium-sized food establishment with a seating capacity of 15 persons, what is the recommended combination of plumbing fixtures?

Kitchen sink, dishwasher, grease interceptor

This is used to remove square and octagonally-shaped threaded faucets. It has a right angle bar with one end for square nuts and other octagonal.

Valve seat wrench

Elbow Turned Up (Flanged)

Which of the following listed fitting do not have the similar function?

Plug

A handheld shower hose that could be submerged in bath water must _____.

always have a backflow prevention device installed

How many bolt holes are there in a Class 150 pipe flange that is 100 mm in diameter?

What is the most probable cause of slow flushing of the water closet?

lack of water in the tank

Maximum length of nipple fitting

12"

100

5 standpipes deliver a total of 250 gpm flow rate. What is the total residual pressure at the outlets if each standpipe has 1 outlet?

981 kpa