Water for rural domestic use is usually obtained from

• Wells

• City mains

• Springs

• Artesian wells

In this type of water system, water is supplied using the pressure generated from the elevated cold water tank

• pump pressure system

• gravity-fed system

• overhead distribution

• pneumatic tank distribution

A method where water is distributed through normal water pressure from public water main for use in low rise buildings

• pneumatic tank method

• up-feed method

• down-feed method

• none of them

A water distribution system in which no elevated storage is provided, and the required distribution pressures are maintained only by pumping facilities.

• Indirect pressure distribution system

• Direct-pressure distribution system

• combination of both

• none of them

The size of water service pipes is based on the maximum and minimum probable water demand, but in no case shall it be less than _____mm in diameter.

• 16mm diameter

• 25mm diameter

• 20mm diameter

• 32mm diameter

A gooseneck is installed in the individual water supply system

• If there is less pressure from the main

• . If there is a need to increase the pressure form the main

• If the water sources is inefficient to supply the branches

• If the flow of the water to the distribution pipe need to be throttled

Pipe clean out is a requirement

• At the upper end of the fixture branch

• At every turn of every sanitary branch

• For every degree change of slope gradient

• For situation “b” most of the time

What type of trap is used to connect the water closet to the horizontal waste pipe?

• P-trap

• S-trap

• drum trap

• none

This valve is operated by lowering the disk, until it presses firmly and evenly on the valve seat and thus cuts off the flow of water; by turning the valve stem to the left, thus raising the valve disk from its seat, the water is turned on.

• lift check valve

• swing check valve

• angle valve

• globe valve

These are used for control, isolation and repair of the water distribution system.

• Control and valves

• pipes and fittings

• risers and fixture branch

• union