For water tanks and other structure which store water, the strips of copper, aluminium, galvanized iron or other collision resistance material, known as the                  

Related MCQs

• Bimetallic strips contain                as a metal.
• Why is invar used in bimetallic strips?
• An iron rod is heated. The colors at different temperatures are noted. Which of the following colors shows that the iron rod is at the lowest temperature?
• Resistance thermometer generally makes use of                  for the measurement of resistance.
• At                  iron changes its BCC structure to FCC.
• For an aluminium the modulus of rigidity is 2.1×1010 N/m2 and density is 2.7×103 kg/m3. Find the speed of transverse waves in the medium.
• The amount of heat flow through a unit area of material of unit thickness in one hour, when the temperature difference is maintained at 1°C is known as                         of the material.
• A water-heater is covered with insulation boards over a total surface area of 3 m2. The inside board surface is at 75°C and the outside being at 20°C and the conductivity of material being 0.08 W/m K. Find the thickness of board to limit the heat transfer loss to 200 W ?
• A water-heater is covered up with insulation boards over a total surface area of 3 m2. The inside board surface is at 75°C and the outside surface is at 20°C and the board material has a conductivity of 0.08 W/m K. How thick a board should it be to limit the heat transfer loss to 200 W ?
• The expansion and contraction joints generally consist of some elastic material, known as                  which should be compressible, rigid, cellular and Resilient.