• ( 1 ) Marble is an example of

    • 1) aqueous rock
    • 2) metamorphic rock
    • 3) sedimentary rock
    • 4) igneous rock
    • Discussion in forum
      Answer : 2) metamorphic rock
      Solution : Marble is a metamorphic rock that is formed from the sedimentary rock limestone.








      discussion


      Answer : 2) metamorphic rock

    • ( 2 ) The specific gravity of sandstone is

    • 1) 1.1 to 1.8
    • 2) 1.8 to 2.65
    • 3) 2.2 to 2.8
    • 4) 2.95 to 3.4
    • Discussion in forum
      Answer : 3) 2.2 to 2.8
      Solution : The specific gravity of sandstone is 2.2 to 2.8








      discussion


      Answer : 3) 2.2 to 2.8

    • ( 3 ) The most powerful explosive used in blasting is

    • 1) blasting power
    • 2) dynamite
    • 3) gun cotton
    • 4) cordite
    • Discussion in forum
      Answer : 3) gun cotton
      Solution : The most powerful explosive used in blasting is gun cotton








      discussion


      Answer : 3) gun cotton

    • ( 4 ) Excess of alumina in the clay

    • 1) makes the brick brittle and weak
    • 2) makes the brick crack and warp on drying
    • 3) changes colour of the brick from red to yellow
    • 4) improves impermeability and durability of the brick
    • Discussion in forum
      Answer : 2) makes the brick crack and warp on drying
      Solution : Good brick earth should contain about 20% to 30% of alumina.
      It is responsible for plasticity characteristic of earth, which is important in moulding operation.
      If present in excess, then the raw brick shrink and warp during drying








      discussion


      Answer : 2) makes the brick crack and warp on drying

    • ( 5 ) The bricks after moulding should be dried in

    • 1) open air
    • 2) sun for 3 to 8 days
    • 3) air for 3 to 8 days but not in sun
    • 4) hot air for 3 days
    • Discussion in forum
      Answer : 3) air for 3 to 8 days but not in sun
      Solution : The bricks after moulding should be dried in air for 3 to 8 days but not in sun








      discussion


      Answer : 3) air for 3 to 8 days but not in sun

    • ( 6 ) The good clay for making bricks is

    • 1) unweathered clay
    • 2) silted soil
    • 3) weathered clay
    • 4) black cotton soil
    • Discussion in forum
      Answer : 3) weathered clay
      Solution : The good clay for making bricks is weathered clay








      discussion


      Answer : 3) weathered clay

    • ( 7 ) The dolomite bricks are

    • 1) ordinary bricks
    • 2) acid refractory bricks
    • 3) basic refractory bricks
    • 4) neutral refractory bricks
    • Discussion in forum
      Answer : 3) basic refractory bricks
      Solution : The dolomite bricks are basic refractory bricks








      discussion


      Answer : 3) basic refractory bricks

    • ( 8 ) The base material for distemper is

    • 1) chalk
    • 2) lime
    • 3) clay
    • 4) lime putty
    • Discussion in forum
      Answer : 1) chalk
      Solution : The base material for distemper is powdered Chalk.








      discussion


      Answer : 1) chalk

    • ( 9 ) The best primer used for structural steel work is

    • 1) white lead
    • 2) red lead
    • 3) zinc oxide
    • 4) iron oxide
    • Discussion in forum
      Answer : 2) red lead
      Solution : The best primer used for structural steel work is red lead








      discussion


      Answer : 2) red lead

    • ( 10 ) Linseed oil is rapidly soluble in

    • 1) alcohol
    • 2) turpentine
    • 3) naptha
    • 4) all of these
    • Discussion in forum
      Answer : 4) all of these
      Solution : Linseed oil is rapidly soluble in alcohol, turpentine and naptha








      discussion


      Answer : 4) all of these





Top