Can be constructed with hand tools or power tools-depth of about 15 meters (50 ft)-can have the greatest diameter that a space may allow.
a. Dug well
b. Drive well
c. Bored well
d. Deep well
a. Dug well
A device used to control an incoming high water pressure into the water distribution system by mechanical means so as to bring it to a working pressure of 80 psi.
a. Pressure relief valve
b. Pressure reducer
c. Pressure reducing valve
d. Pressure regulator
c. Pressure reducing valve
A residence with 12 family members requires 3.6 cu. meters of cold water daily with peak demand. What is the maximum hot water probable hourly demand?
a. 110 liters
b. 100 liters
c. 120 liters
d. 140 liters
c. 120 liters
A term used for a pipe extension of not more than 2 feet in length, installed at any stack or branch of a plumbing rough-in for the purpose future tap.
a. tail piece
b. Branch
c. clean out
d. stub out
d. stub out
A type of water pump with its pump motor installed on the surface attached to a lift and push rod to activate a submerged piston.
a. reciprocating pump
b. sump pump
c. jack pump
d. centrifugal pump
a. reciprocating pump
A vent used in a battery of plumbing fixtures where the vent is installed in front of the last fixture of the battery.
a. yoke vent
b. circuit vent
c. stack vent
d. relief vent
b. circuit vent
In a water distribution system, locations such as supply pipe to every water heater requires a full open valve. Which of the following in the list is a full open valve?
a. check valve
b. ball valves
c. globe valve
d. angle valve
d. angle valve
Minimum water delivery in liters per minute for an outlet of a wet standpipe at a residual pressure or 1.8 kilos per sq. mts.
a. 132 liters per minute
b. 112 liters per minute
c. 155 liters per minute
d. 126 liters per minute
a. 132 liters per minute
Single lever valves used in kitchen sink and lavatory faucets or at shower valves has gain popularity in plumbing installation today. This is because these valves are beautiful and are maintenance-free. These valves work by the principle of a:
a. gate valve
b. angle valve
c. ball valve
d. globe valve
c. ball valve
The maximum height of a fire service connection from the grade line is ______ cms.
a. 120 cms.
b. 130 cms.
c. 122 cms
d. 102 cms.
c. 122 cms
The maximum horizontal developed length between the trap seal and the vertical vent inlet at the trap arm.
a. 6 feet
b. 5 feet
c. 4 feet
d. 3 feet
b. 5 feet
The minimum height of fire service connection from the grade line is ____ cms.
a. 50 cms.
b. 100 cms.
c. 46 cms.
d. 35 cms
c. 46 cms.
The standard size of an outlet of a dry standpipe located for each floor is ___mm. diameter.
a. 51 mm (2”)
b. 76 mm (3”)
c. 38 mm (1 1/2”)
d. 64 mm (2 1/2”)
d. 64 mm (2 1/2”)
Water as delivered by NAWASA is no longer safe for drinking because of several contaminants from the water source present in the environment. It is now therefore imperative that water to be safe for drinking has to undergo water purification in several stages. Because of several contaminants, water undergoes several stages. What is a stage in water purification, which removes mineral deposits, salts, heavy metal, totally dissolves solids while some useful minerals are retained?
a. carbon filtration
b. Aeration
c. ultraviolet radiation
d. reverse osmosis
d. reverse osmosis
What is a device installed on top of a pressure tank used to protect against hydrostatic collapse due to suction or negative pressure resulting from backsiphonage in a downfeed water distribution system?
a. pressure reducing valve
b. vacuum breaker valve
c. air volume control valve
d. pressure relief valve
d. pressure relief valve
What is a type of vent applied on installations with multi-branch interval where the vertical vent pipe takes off in front of the first fixture and connects to a main vent stack?
a. Relief vent
b. Yoke vent
c. Loop vent
d. Circuit vent
b. Yoke vent
What is the size of supply inlet for flush tank type water closet?
a. 3/4”
b. 1/2”
c. 3/8”
d. 1”
c. 3/8”
Where are dampers installed to regulate the amount of cool air for an even distribution to outlets?
a. at the trunk ducts
b. at a practical location at angles and elbows
c. at the branch supply duct as far as practical from the
outlet
d. at the air boot fitting
c. at the branch supply duct as far as practical from the
outlet
A kind of G.I. fitting used as a reducer from a bigger diameter to a lesser diameter.
a. Bushing
b. Reducer
c. Fitting
d. Union
a. Bushing
Acidity is one of the most problems in water distribution and water purification, which can cause Corrosion of non-ferrous pipes and Rusting & clogging of steel pipes, which is the best solution for this problem?
a. Passing the water through a bed of crushed marble or
limestone to achieve alkalinity, or adding sodium silicate
b. Chlorination for removing salt contents
c. Aeration
d. None of the above
a. Passing the water through a bed of crushed marble or
limestone to achieve alkalinity, or adding sodium silicate
