Which of the following constituents of steels is softest and least strong ________________?

Related Mcqs:

1. ‘Killed steels’ are those steels__________________?

   A. which are destroyed by burning
   B. which after their destruction are recycled to produce fresh steel
   C. which are deoxidised in the ladle with silicon and aluminium
   D. in which carbon is completely burnt
   E. which have poor properties due to improper manufacturing

2. The basic constituents of Hastelloy are_________________?

   A. aluminium, copper etc
   B. nickel, molybdenum etc
   C. nickel, copper, etc
   D. all of the above
   E. none of the above

3. Basic constituents of Monel metal are _________________?

   A. nickel, copper
   B. nickel, molybdenum
   C. zinc, tin, lead
   D. nickel, lead and tin
   E. none of the above

4. Which of the following pipes is least corrosion resistant__________________?

   A. brass
   B. mild steel
   C. cast iron
   D. wrought iron
   E. copper

5. Heavy duty leaf and coil spring* contain carbon of the following order ________________?

   A. 0.2%
   B. 0.5%
   C. 0.8%
   D. 1.0%
   E. 1.5%.

6. The work done per unit mass of air in compression will’be least when n is equal to______________?

   A. 1
   B. 1.2 ,
   C. 1.3
   D. 1.4
   E. 1.5

7. Which of the following gases has the highest calorific value ________________?

   A. producer gas
   B. coal gas
   C. water gas
   D. blast furnace gas
   E. coke oven gas

8. Specific weight of water in S.I. units is equal to ________________?

   A. 1000 N/m3
   B. 10000 N/m3
   C. 9.81 xlO3 N/m3
   D. 9.81 xlO6N/m3
   E. 9.81 N/m3

9. The biggest size of thermal power unit operating in India is ________________?

   A. 30 MW
   B. 60 MW
   C. 100 MW
   D. 210 MW
   E. 500 MW

10. The fusible plug in small boilers is located ________________?

    A. in the drum
    B. in the fire tubes
    C. above steam dome
    D. over the combustion chamber
    E. at the inlet of chimney