Alumina, silica, lime and iron oxide are the basic raw material for the manufacture of Portland cement. The component of Portland cement which first hardens is_____________________?

Related Mcqs:

Oxide layer formed on the non-ferrous metal surface after its annealing is__________________?

A. Removed by acid pickling B. Hammered into the surface C. Removed with coarse emery cloth D. Left as such to protect the surface...

Carnot cycle is also termed as the constant _________________ cycle in thermodynamics?

A. Entropy B. Pressure C. Volume D. Heat...

The minimum and the maximum number of members required to form a Private Limited Joint Stock Company are respectively __________________?

A. 7 and 30 B. 10 and 50 C. 2 and 50 D. 13 and 55...

The mechanism which changes the value of manipulated variable in response to the output signal from the control unit is called the___________________?

A. Final control element B. On-off control C. Floating control action D. None of these...

Pick out the wrong statement ?

A. A ferromagnetic material becomes paramagnetic above the ‘Curie temperature’ B. Permanent magnets are made of hard materials, whereas electromagnets require soft magnetic materials C. Soft magnetic materials (e.g., pure iron) have higher permeability and low hysterisis loss and coercive forces D. Tungsten steel and alnico are not hard magnetic materials...