Related Mcqs:

1. Good design of the casing of a centrifugal pump aims at minimising the __________________________?

   A. Cavitation
   B. Frictional losses
   C. Kinetic energy loss
   D. Static head

2. Which of the following is an undesirable property of slag produced during the Pyrometallurgical method of metal extraction from its ore ?

   A. High fusibility & fluidity
   B. High thermal conductivity
   C. Low density
   D. High chemical activity

3. Common salt is produced from sea water in India generally by the ________________ method?

   A. Freeze drying
   B. Solar evaporation
   C. Electrolytic
   D. None of these

4. Sacrificial anode method is used in the protection of pipelines which are buried underground. Sacrificial anode________________?

   A. Occurs higher in the electro-chemical series of metals
   B. Is exemplified by magnesium plate
   C. Is much cheaper than the cathodic base material to be guarded against corrosion
   D. All A, B. & C.

5. Depreciation of machines fails under the indirect expenses head. As per income tax regulations, it is calculated by the __________________ method?

   A. Diminishing balance
   B. Sinking fund
   C. Multiple straight line
   D. Sum of the years digit

6. In practice, the compression ratio of compression-ignition (CI) engine ranges from ______________________?

   A. 15 to 25
   B. 5 to 10
   C. 40 to 55
   D. 60 to 70

7. ____________________ flux is used for the extraction of metal from its self fluxing ores?

   A. No
   B. Acid
   C. Basic
   D. Neutral

8. Nickel and ______________ are the alloying element added in steel to increase its toughness?

   A. Molybdenum
   B. Chromium
   C. Vanadium
   D. Silicon

9. The expected efficiency of a single riveted lap joint is of the order of 50%. If the thickness of the plate is increased four times, then the rivet diameter will have to be increased ___________________ times ?

   A. Two
   B. Four
   C. Six
   D. Eight

10. _______________ has a negative co-efficient of linear expansion?

    A. Iron
    B. Copper
    C. Rubber
    D. Nickel