How can you define an effective water supply?

• It allows the backflow of used water into the water supply.

• It can provide an insufficient amount of water to all fixtures in a building

• It can provide a sufficient amount of water to supply each fixture.

• Can control the water level in every fixture

How would you start soldering copper pipe joints?

• Place the fitting up to the hub and rotate for several times until the flux is evenly spread

• Wipe the excess flux and around the fitting and solder and solder in one operation only. With a propane torch, heat the fitting uniformly around the pipe.

• Clean thoroughly both ends of the pipe to a bright finish including the inside of the fittings with emery cloth or fine sand paper.

• Apply a tin coat of non-corrosive flux or soldering paste to all cleaned surface of the pipe and fittings.

It is the most popular and generally specified material for drainage in the past several decades. It is durable, conveniently installed, and answer to the most plumbing needs of all types of buildings less than 25 stories high?

• Asbestos Pipe

• Vitrified Clay Pipe.

• Bituminous Fiber Sewer Pipe.

• Cast Iron Pipe

We all know that the size of G.I. Pipe is measured by using caliper. How can we measure the inside diameter of the pipe if caliper is not available.

• by using a ruler

• by using tape measure

• by using spring

• by using string

What way would you design a septic tank?

• Septic tank should be at least 15 meters away from any source of water supply. 2.00 meters from the outside wall of the building

• Septic tank should be at least 10 meters away from any source of water supply. 1.00 meters from the outside wall

• Septic tank should be at least 5 meters away from any source of water supply. 1.00 meters from the outside wall

• Septic tank should be at least 12 meters away from any source of water supply. 2.00 meters from the outside wall

Why Cast Iron Pipe is not applicable in more than 25 stories high building?

• Vibration is present in 25-storey high building which loosen the lead calk joint between the pipes causing unwanted sag and water leak.

• Basically, this type of pipe is brittle in character and requires stronger support for each pipe installed horizontally to prevent sagging of joints.

• This kind of pipe is remarkably superior for embedment in concrete structure for having the same material properties

• This type of pipe is light in weight, slightly flexible which could take slight soil movement without danger of cracking or pulling out from its joint.

When should we use a single hub pipe?

• Single hub pipe is used for a well-fitted hub and spigot connections.

• Single hub pipe is recommended when the length of a pipe needed is more than 150 centimeters long wherein cutting is not necessary.

• Single hub pipe is preferred when a piece of pipe needed is shorter than 150 centimeters long. When the pipe is cut, both ends has hub to serve as joint connector.

• Single hub pipe is used in lieu of the single hub to do away with caulking of joints. It is cheaper and easily connected using a neoprene rubber sleeves.

Which if the following is not a special feature of Copper Pipe?

• It could be used as cold water supply line.

• It needs more joints and fairings.

• Copper pipe may be used one size smaller than a steel pipe.

• It can replace rusted or choked-up sections of galvanized steel pipe.

Which of the statements makes brass pipe become superior material for waste and water supply installations.

• Because of its smooth interior surface and high resistance to acid.

• Because brass pipe is a suitable pipe for all kind of water system

• Because brass pipe it is suitable for underground installation

• It is commonly used in residential water supply line and for radiant heating installations.

The thickness of the pipe is twice as that of the standard cast iron pipe.This kind of pipe is remarkably superior for embedment in concrete structure for having the same material properties?

• Asbestos Pipe

• Lead Pipe

• Vitrified Clay Pipe

• Bituminous Fiber Sewer Pipe