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

Related Mcqs:

1. In Newton’s law of viscosity, which states that the shear stress is proportional to the _____________ Co-efficient of viscosity is called dynamic or absolute viscosity(where, V = velocity, Vg = velocity gradient) ?

   A. V2
   B. 1/V2
   C. 1/Vg
   D. Vg

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. 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

4. Pick out the wrong conversion of absolute & kinematic viscosities ?

   A. 1 stoke = 1 cm2/sec
   B. 1 N.sec/m2 = 10 paise
   C. 1 stoke = 1 m2/sec
   D. 1 m2/sec = 104 stokes

5. 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

6. For the Stoke’s law to be valid in the case of a falling sphere in a fluid, the_____________________?

   A. Reynolds number (based on sphere diameter) should be < 1
   B. Flow around the sphere should be in turbulent region
   C. Sphere must be metallic
   D. Fluid density should be constant

7. On oscilloscope screen for dynamic measurement, lissajous diagram is normally used to determine the ______________ of the input signal?

   A. Frequency
   B. Amplitude
   C. Damping
   D. None of these

8. For dynamic strain measurement, the Wheatstone bridge used is of ______________ type ?

   A. Voltage sensitive null
   B. Voltage sensitive deflected
   C. Current sensitive deflected
   D. None of these

9. One face of a furnace wall is at 1030°C and the other face is exposed to room temperature (30°C). If the thermal conductivity of furnace wall is 3 W. m-1. k-1 and the wall thickness is 0.3 m, the maximum heat loss (in W/m) is____________________?

   A. 100
   B. 900
   C. 9000
   D. 10000

10. The heat released by cooling one mole of copper from 400 K to room temperature (300 K) is (assume : Cp of copper is 23 J K-1mole-1) ?

    A. 2300 J
    B. 4600 J
    C. 230 J
    D. 2.3 × 106 J