Building Materials, Third Edition

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1. Aluminium can be
   
   
   1. riveted 2. welded 3. soldered
      Of the above
      (a) 2 and 3 are correct (b) 1and 2 are correct
      (c) 1 and 3 are correct (d) 1, 2 and 3 are correct
   
   
   
   


2. Consider the following with regards to aluminium
   
   
   1. It is resistant to the attack of nitric acid
   
   
   2. It dissolves slowly in concentrated sulphuric acid
   
   
   3. It is soluble in hydrochloric acid
      Of these
      (a) only 1 is correct (b) only 3 is correct
      (c) 2 and 3 are correct (d) 1, 2 and 3 are correct
   
   
   
   


3. Addition of which of the following metal reduce(s) the ductility of brass
   
   
   1. Lead 2. Tin 3. Aluminium
      (a) 1 and 2 (b) 2 and 3 (c) 3 and 1 (d) 1, 2 and 3
   
   
   
   


4. Match List-1 (Alloy metal) with List-II(Application/characteristic) and select the correct
   answer using the codes given below the lists:
   List-I List-II
   A. Alluminium alloy 1. Buliding flashing and damp proof
   B. Copper 2. Radiation shielding
   C. Zinc 3. Lightning conductor
   D. Lead 4. Low density and high resistance to corrosion
   Codes:
   (a)ABCD (b)ABCD
   3421 4321
   (c)ABCD (d)ABCD
   3412 4312


5. Which of the folowing pairs is matched correctly?
   (a) Aluminium Vertical retort furnace
   (b) Copper Bayer ’s process
   (c) Zinc Reverberatory furnace
   (d) Lead Blast furnace


6. Y-alloy is an alloy of aluminium and
   (a) copper (b) nickel
   (c) zinc (d) tin


7. Brass is an alloy of
   (a) copper and zinc (b) copper and tin
   (c) copper and aluminium (d) zinc and tin


8. The alloy used as plumber solder is
   (a) y-alloy (b) duralumin
   (c) lead-tin alloy (d) pewter


9. Mangolia metal used for making bearings is an alloy made from
   (a) alluminium (b) copper
   (c) lead (d) tin