What is the reason of soda being added to
water and is used for cooling instead of plain
water, except?
a. It reduces the amount of heat generated.
b. It improves the finish.
c. It overcomes rusting.
d. It makes clean and pure.
What tool is used to check external pipe
threads?
a. Plug gage
b. Pitch gage
c. Thread gage
d. Ring gage
d. Ring gage
What tool is used to check internal pipe
threads?
a. Plug gage
b. Pitch gage
c. Thread gage
d. Ring gage
a. Plug gage
If muriatic acid is used as a flux, the soldered
area must be cleaned thoroughly afterwards to
prevent?
a. Anyone touching it from getting burned.
b. Remaining acid from eating the metal.
c. The acid from evaporating and the solder
disintegrating.
d. None of the above.
b. Remaining acid from eating the metal.
Prepared soldered paste flux is most popular
but if you did not have any, you could use?
a. Hydrochloric acid
b. Nitric acid
c. Sulphuric acid
d. Any of the above
a. Hydrochloric acid
Hard solder is made of which of the
following?
a. Copper and zinc
b. Tin and copper
c. Tin and zinc
d. Tin and lead
a. Copper and zinc
Which of the following is the flux usually used
for hard solder?
a. Rosin
b. Barium
c. Borax
d. Alum
c. Borax
Soft solder is made of which of the following?
a. Copper and zinc
b. Tin and brass
c. Tin and copper
d. Tin and zinc
c. Tin and copper
At what temperature where soft solder
approximately melts?
a. 250 deg
b. 450 deg
c. 350 deg
d. 550 deg
c. 350 deg
Which of the following flanges is suitable for
low and moderate pressure?
a. Ring flange
b. Lap joint flange
c. Tapered hub flange
d. Welding neck flange
a. Ring flange
Plumbing pipe material that perfect for
underground installation last up to 100 years.
a. Copper type K
b. HDPE
c. Vitrified clay
d. Cast iron
b. HDPE
What kind of plumbing material that measures
OD in the market?
a. PPr
b. Copper
c. PE
d. Cast iron
a. PPr
Water test procedure for Cast Iron pipe.
a. 3 m head and hydrotest with 4.3 psi atleast 15 mins.
b. 3 m head and hydrotest with 5 psi atleast 10 mins.
c. 5 m head, 10 psi at 10 mins.
d. 5 m head, 1 psi at 10 mins.
a. 3 m head and hydrotest with 4.3 psi atleast 15 mins.
How do you connect two hubless cast iron
pipes?
a. Shielded coupling
b. Elbow
c. Structural compression gasket
d. Polymer compression gasket
a. Shielded coupling
What kind of test shall apply for cast iron pipe
installation?
a. Water test
b. Smoke test
c. Peppermint test
d. All of the above
d. All of the above
Cast iron pipe and fittings shall be test with or
transport/store compressed air or gas.
a. True
b. False
b. False
These are similarities about sump pump and
sewage pump, except:
a. Located in a building’s basement.
b. Connected to the drainage system to move waste
from one place to another.
c. Deals with solid, liquid waste and heavy liquids flush
down from a building.
d. Function as an internal septic system for residential
and other buildings
c. Deals with solid, liquid waste and heavy liquids flush
down from a building.
In water piping, wrought copper fittings under
concrete floor slab resting on the ground shall be:
a. Brazed joint
b. Soldered joint
c. Flared joint
d. Mechanical joint
a. Brazed joint
A type of joints shall not be used where severe
erosion, crevice corrosion, shock or vibration are
expected to occur in building service pipe.
a. Threaded joints
b. Soldered joints
c. Brazed joints
d. Mechanical joints
a. Threaded joints
