Mortars:
· What are the different tests carried out to check the quality of mortars?
· What types of mortars will you recommend for a) Masonry in foundation; b) Plastering the interiors of a house; c) Foundation work; d) Plastering exterior of a house. Give reasons for your selection.
· What are the functions of sand, surkhi and water in mortar?
Ferrous Metals:
· State the differences between mild steel, wrought iron, cast iron and cast steel?
· State the different type of steel used for a) Re-enforcement in pre-stressed concrete and cement concrete; b) Bridge Girder; c) Spring; d)Ball-bearing; e)Axles; f)Railway switches; g)Cables of suspended bridge; h)Hammer.
· Write short notes on a) Low Carbon Steel; b) Red-shortness; c) Pig-Iron; d) Wrought Iron; e) Cast-steel; f) HYSD bars; g) Forge-pig; h) Cuploa furnace
· Write down the composition and uses of following alloys of steel a) Stainless steel; b) Tungsten Steel; c) Nickel Steel; d) Molybdenum Steel; e) Invar Steel; f) Manganese Steel; g) Vanadium steel
· Answer the following,
o What are the properties of high tensile strength steel?
o What are the factors which control the quality of steel?
Paints and Varnishes:
· Answer the following,
o What are the various ingredients of paints? Also list their functions.
o Why are steel structures painted?
· Answer the following
o What are the characteristics of good oil-paints?
o How painting of new wood-work in done?
· Briefly explain the following a)Enamels; b)Anti-corrosive Paint; c); d)Thinners; e)Plastic Emulsion Paints ; f)Distemper; g)Fire-proof paint; h)Casein Paints .
· What paint(s) shall be used for protecting the steel structures in the coastal area and why?
Non-ferrous materials:
· Discuss the use of non-ferrous metals as building materials?
· What is an alloy? What are different types of alloys? Describe the following w.r.t their properties and uses a) Brass; b) German silver; c) Pewter; d) Bronze; e) Y-alloy; f) Mongolia metal?
Ceramics:
· Answer the following
o State the important characteristics of Plastics
o Write a note on Bakelite
o Explain moulding of plastics
o What do you understand by "smoked rubber?"
· What are the ceramic materials? What are their properties? Describe the mechanical properties of ceramics.
· What are the different ways in which glass is used in building industry?
· What are the physical and chemical characteristics of a) PVC; b) Plastics; c) Rubber?
· Answer the following
o Elaborate on the mechanical properties of the ceramics
o What is the process of obtaining Tempered glass?
o List the classification of ceramic materials
o What is the difference between Milk glass and Flint glass?
