The specific gravity of coal depends mainly on its ______________ content?

Related Mcqs:

1. Maximum permissible sulphur content in steel is ______________ percent?

   A. 0.015
   B. 0.055
   C. 0.505
   D. 0.805

2. Maximum carbon content in cast iron is ______________ percent?

   A. 3.8
   B. 5.2
   C. 4.8
   D. 4.3

3. Carbon content in plain carbon steel is ______________ percent?

   A. 0.1 to 0.15
   B. 0.35 to 0.45
   C. 0.65 to 0.80
   D. 0.85 to 1.2

4. Brass tubes are used in the manufacture of tubes of evaporators used in sugar and salt industries, mainly because of its ______________________?

   A. High co-efficient of thermal expansion
   B. Low thermal conductivity
   C. High corrosion resistance
   D. All A., B. and C.

5. Which of the following constituents of cast iron is mainly responsible for imparting it an anti-corrosive property ?

   A. Silicon
   B. Phosphorus
   C. Sulphur
   D. None of these

6. Aluminium alloy is one of the most suitable materials of construction for aircrafts mainly due to its___________________?

   A. High strength to weight ratio
   B. Low temperature strength properties
   C. Its ability to be cast, rolled, forged & stamped
   D. High strength and corrosion & oxidation-resistance at elevated temperature

7. Carbon content in steel is ___________________ percent?

   A. 0.1-2
   B. 4-6
   C. 2-4
   D. 0.001-0.01

8. Steel will respond to hardening by heat treatment processes, only when the minimum carbon content in it is _____________ percent?

   A. 0.02
   B. 0.2
   C. 0.35
   D. 0.5

9. Maximum carbon content in any variety of steel can be upto 1.3%. Steel containing 0.4% Carbon is not used for making___________________?

   A. Nuts
   B. Bolts
   C. Chisels
   D. Studs

10. Presence of even very minute amount (say 0.1%) of ______________ in copper, reduces its electrical conductivity very seriously?

    A. Bismuth
    B. Arsenic
    C. Antimony
    D. Both B. and C.