Related Mcqs:

1. Absolute zero, pressure will occur, when the molecular momentum of the system becomes zero. A liquid will cease to exist as liquid at________________?

   A. High vacuum
   B. Zero pressure
   C. 0°K
   D. Earth’s centre

2. The ratio of thermal & electrical conductivity is same for all the metals at the same temperature; and at around room temperature, this ratio is proportional to(where, T = absolute temperature, °K) ?

   A. T
   B. 1/T
   C. T2
   D. 1/T2

3. Velocity of a gas in sound is not proportional to (where, T = Absolute temperature of the gas. P = Absolute pressure of the gas. y = Ratio of specific heats (Cp/Cv) ρ = specific weight of the gas) ?

   A. √T
   B. 1/√P
   C. √y
   D. 1/√ρ

4. Absolute zero pressure can be attained at a temperature of___________________?

   A. 0°C
   B. 50°K
   C. 0°R
   D. None of these

5. Change in volume of metals from absolute zero temperature to their melting points is___________________?

   A. Almost same for all metals
   B. Different for different metals
   C. Less for low melting point metals
   D. Less for high melting point metals

6. The boiling & freezing points on a newly defined temperature scale in degree ‘D’ are 400°D & 100°D respectively. The temperature reading corresponding to 60°C on this new temperature scale will be equal to _____________ °D ?

   A. 140
   B. 180
   C. 240
   D. 280

7. Heating the Hypo-eutectoid steels to 30°C above the upper critical temperature line, soaking at that temperature and then cooling slowly to the room temperature to form a pearlite & ferrite structure is called_______________________?

   A. Tempering
   B. Hardening
   C. Annealing
   D. Normalising

8. The kinematic viscosity (in stoke) and the absolute/dynamic viscosity (in poise) are the same for ______________ at room temperature ?

   A. Air
   B. Water
   C. Mercury
   D. Alcohol

9. Heating of ferromagnetic materials to a temperature above Curie temperature makes it ________________________?

   A. Insulator for heat & electricity transmission
   B. Ferritic
   C. Behave like paramagnetic materials
   D. Superconductor

10. While the recrystallisation temperature for pure metals is 0.3 Tm, the same for alloys is equal to ______________ × Tm (where, Tm Melting temperature) ?

    A. 0.25
    B. 0.45
    C. 0.70
    D. 0.95