Balls for ball bearings are made of_________________?

Related Mcqs:

1. Annealing of white cast iron results in production of_________________?

   A. malleable iron
   B. nodular iron
   C. spheroidal iron
   D. grey iron
   E. none of the above

2. Depth of hardness of steel is increased by addition of_________________?

   A. nickel
   B. chromium
   C. tungsten
   D. vanadium
   E. ell of the above

3. Super conduction by metals is observed in the temperature range of_________________?

   A. below 10°K
   B. above 100°K
   C. around 0°C
   D. around 100°C
   E. above 1000°C

4. Connecting rod is usually made of_________________?

   A. aluminium
   B. low carbon steel
   C. medium carbon steel
   D. high carbon steel
   E. cast iron

5. Drop forging dies contain carbon of the order of_________________?

   A. 0.1 to 0.2%
   B. 0.25 to 0.5%
   C. 0.6 to 0.7%
   D. 0.7 to 0.9%
   E. 1.0 to 1.2%.

6. Foundry crucible is made of_________________?

   A. mild steel
   B. german silver
   C. lead
   D. cast iron
   E. graphite

7. Austenite rs a combination of_________________?

   A. ferrite and cementite
   B. cementite and gamma iron
   C. ferrite and austenite
   D. ferrite and iron graphite
   E. pearlite and ferrite

8. Ball valves are commonly used to_________?

   A. throttle flow
   B. check flow
   C. change flow direction
   D. start/stop flow

   Submitted by: Faheem Zaman Dhaunroo

9. The efficiency of I.C. engines normally is of the order of_________________?

   A. 15-20%
   B. 20-25%
   C. 25-30%
   D. 30-35%
   E. 35-50%

10. Pitot tube is used for measurement of_________________?

    A. pressure
    B. flow
    C. velocity
    D. dsscharge
    E. viscosity