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Home ‣ Mechanical Engineering ‣ Strength of Materials See What Others Are Saying!
  • Question

  • The proof resilience per unit volume of a material is known as modulus of resilience.


  • Options
  • A. True
  • B. False

  • Correct Answer
  • True 

    • More questions

    • 1. The by-pass factor, in case of sensible cooling of air, is given by (where td1 = Dry bulb temperature of air entering the cooling coil, td2 = Dry bulb temperature of air leaving the cooling coil, and td3 = Dry bulb temperature of the cooling coil)

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 2. The frequency of oscillation of a torsional pendulum is

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 3. If the valve clearances are excessively large, the problem that can arise is

    • Options
    • A. overheating of the engine
    • B. incomplete valve closure
    • C. fouling of spark plug by gasoline
    • D. none of these
      • Discuss
    • 4. In diesel engines, the fuel is injected in the form of very fine spray, into the engine cylinder, which gets ignited due to high temperature of the compressed air.

    • Options
    • A. Agree
    • B. Disagree
      • Discuss
    • 5. High speed compression engines operate on

    • Options
    • A. Otto cycle
    • B. Diesel cycle
    • C. Dual-combustion cycle
    • D. all of these
      • Discuss
    • 6. The capacity of the cooling tower and spray ponds __________ as the wet bulb temperature of air decreases.

    • Options
    • A. increases
    • B. decreases
      • Discuss
    • 7. A perfect black body is one which

    • Options
    • A. is black in colour
    • B. absorbs heat radiations of all wave lengths falling on it
    • C. reflects all the heat radiations
    • D. transmits the heat radiations
      • Discuss
    • 8. Body centred cubic space lattice is found in

    • Options
    • A. zinc, magnesinm, cobalt, cadmium, antimony and bismuth
    • B. gamma-iron, aluminium, copper, lead, silver and nickel
    • C. alpha-iron, tungsten, chromium and molybdenum
    • D. none of the above
      • Discuss
    • 9. Which of the following statement is wrong?

    • Options
    • A. The performance of the vapour compression refrigerator varies considerably with both vaporising and condensing temperatures.
    • B. In vapour compression cycle, the useful part of the heat transfer is at the condenser.
    • C. In ammonia-hydrogen (electolux) refrigerator, no compressor, pump or fan is required.
    • D. The effect of under-cooling the liquid refrigerant is to decrease the coefficient of performance.
      • Discuss
    • 10. If an incompressible liquid is continuously flowing through a pipe, the quantity of liquid passing per second is different at different sections.

    • Options
    • A. True
    • B. False
      • Discuss

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