Related Mcqs:

1. Which of the following is universally employed as the low expansion metal in the bimetallic thermometer, which is an iron-nickel alloy containing 36% nickel and has very low co-efficient of expansion (1/20th of ordinary metals) ?

   A. Invar
   B. Constantan
   C. Chromel
   D. Alumel

2. Thermometer bulb & capillary in case of mercury filled pressure spring expansion thermometer is normally made of ______________ as mercury does not amalgamate with it?

   A. Copper
   B. Copper alloys
   C. Stainless steel
   D. Monel

3. The temperature at which new grains are formed in the metal is called the ______________ temperature?

   A. Eutectic
   B. Recrystallisation
   C. Upper critical
   D. Lower critical

4. In hot wire anemometer used for gas flow measurement, the wire is normally made of ______________________?

   A. Copper
   B. Platinum
   C. Constantan
   D. Chromium

5. Vycor, a widely used material for making ‘thermal wells’ in temperature measurement, is a_______________?

   A. Cermet
   B. Glass
   C. Thermosetting plastic
   D. Metallic alloy

6. The increase in hardness of metal due to its cold working is termed as the _______________ hardening?

   A. Work
   B. Age
   C. Induction
   D. Flame

7. A steel alloy containing 36% nickel is called _____________________, which has a zero co-efficient of expansion?

   A. Austenitic stainless steel
   B. Heat resisting steel
   C. Invar
   D. High speed steel

8. High speed cutting tool steels contain about _______________ percent of tungsten?

   A. 6-8
   B. 18-20
   C. 30-35
   D. 50-55

9. High speed steel tools retain their hardness upto a temperature of _____________ °C?

   A. 500
   B. 750
   C. 900
   D. 1100

10. Steel pipes are normally manufactured by ______________ process?

    A. Extrusion
    B. Cold working
    C. Forging
    D. Electroforming