Speed of a submarine in deep sea & that of an aeroplane is measured by a/an

A. Pitot tube

B. Hot wire anemometer

C. Rotameter

D. Stroboscope

Please do not use chat terms. Example: avoid using "grt" instead of "great".

You can do it
  1. In Newton's law of viscosity, which states that the shear stress is proportional to the __________ Co-efficient…
  2. A solar cell converts the sunlight directly into __________ energy.
  3. The refractory lining of the bottom in a basic electric arc furnace is made of
  4. The units of the rate constant for a second order reaction are
  5. __________ cannot increase the fatigue strength of a material.
  6. Otto cycle used in spark ignition petrol engines is also known as the constant __________ cycle.
  7. __________ circuit is most commonly used to measure strain with the help of a strain gauge.
  8. Which of the following heat treatment processes is usually applied to castings?
  9. Non-ferrous alloys used for making cutting tools need not have high
  10. Production of one ton of paper in Indian paper industry consumes about __________ kWh of electricity.
  11. Steel produced from phosphatic iron is __________ in nature.
  12. Pick out the wrong statement.
  13. During sensible cooling of air, its wet bulb temperature
  14. In an amorphous material, atoms defy any definite atomic structure and exist in random pattern just…
  15. Which of the following is the most suitable abrasive for grinding high tensile strength materials?
  16. Which of the following has the least value of ultimate tensile strength (UTS)?
  17. Wood is a/an __________ material.
  18. Which of the following metals is the most prone to work hardening?
  19. Nuclear fission of one atom of uranium-235 produces the energy equivalent to about __________ MeV.
  20. At the point of boundary layer separation in fluid flow, the
  21. Heating the Hypo-eutectoid steels to 30°C above the upper critical temperature line, soaking at…
  22. Which of the following has the highest modulus of elasticity (about 7 × 106 kg/cm2)?
  23. The highest stress that a material can withstand for a specified length of time without excessive deformation…
  24. Closeness of packing is maximum in case of __________ crystal lattice.
  25. __________ test determines the yield strength, Young's modulus of elasticity, percentage reduction in…
  26. The most abundant metal present in the earth's crust is;
  27. The fugacity of liquid water at 298 K is approximately 3171 Pa. Considering the ideal heat of vaporisation…
  28. One ton of refrigeration is not equivalent to the heat removal rate of
  29. In case of compression of one kg of air, the work done will be the least, when the value of polytropic…
  30. The stress at which extension of the material takes place more rapidly as compared to the increase in…