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    Test Quiz Mechanical Engineering - Set 21


    1. A nozzle is said to be a convergent-divergent nozzle, when the cross-section of a nozzle first decreases from its entrance to throat and then increases from its throat to exit.
    True
    False

    2. The entropy of the universe is continually on the increase.
    Correct
    Incorrect

    3. The angle which the normal reaction makes with the resultant reaction is called angle of friction.
    Disagree
    Agree

    4. The spigot and socket joint is mostly used for pipes which are buried in the earth.
    Agree
    Disagree

    5. An ignition coil in the spark ignition engines supplies ________ voltage to the spark plug.
    High
    Low

    6. The moment of inertia of a square of side a about its base is a4/3
    False
    True

    7. Both the Ericsson and Joule's cycle have two constant pressure processes.
    True
    False

    8. The maximum displacement of a body, from its mean position is called amplitude.
    True
    False

    9. The ideal efficiency of simple gas turbine cycle depends upon pressure ratio.
    Yes
    No

    10. Vectors method for the resultant force is also called polygon law of forces.
    Incorrect
    Correct

    11. Cold working requires much higher pressure that hot working.
    Correct
    Incorrect

    12. The stage efficiency is the ratio of energy supplied to the blades per kg of steam to the total energy supplied per stage per kg of steam.
    True
    False

    13. The path of the projectile is a parabola.
    True
    False

    14. The friction experienced by a body, when at rest, is known as static friction.
    Yes
    No

    15. Gas turbine cycle consists of
    2 isentropic and 2 constant volumes
    2 isentropic and 2 constant pressures

    16. The punch and die set up is ________ for punching and piercing operation.
    Same
    Similar

    17. According to Euler's column theory, the crippling load for a column of length (l) with one end fixed and the other end free is __________ the crippling load for a similar column hinged at both the ends.
    More than
    Less than

    18. A Bell Coleman refrigerator working on dense air system as compared to open air system, for the same range of temperature, results in ________ power per tonne of refrigeration.
    Lower
    Higher

    19. The compressive strength of brittle materials is __________ its tensile strength.
    Less than
    Greater than

    20. Which of the following refrigerant has the lowest boiling point?
    Sulphur dioxide
    Carbon dioxide

         Score =

    Correct answers:

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    Item Reviewed: Test Quiz Mechanical Engineering - Set 21 Rating: 5 Reviewed By: Pranab Debnath
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