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    Test Quiz Mechanical Engineering - Set 23

    1. The coefficient of venturi-flume, generally, lies between
    0.3 to 0.45
    0.50 to 0.75
    0.75 to 0.95
    0.95 to 1.0

    2. Teflon is used for bearings because of
    Low coefficient of friction
    Better heat dissipation
    Smaller space consideration
    All of these

    3. The process of under-cooling is generally brought about by
    Circulating more quantity of cooling water through the condenser
    Using water colder than the main circulating water
    Employing a heat exchanger
    Any one of the above

    4. The thermal diffusivity for gases is generally __________ those for liquids.
    Equal to
    Less than
    Greater than
    None of these

    5. The enlarging of an existing circular hole with a rotating single point tool is called
    Internal turning

    6. During hot working of metals
    Poor surface finish is produced
    Scale is formed on the metal surface
    Close tolerances cannot be maintained
    All of these

    7. A column that fails due to direct stress, is called
    Short column
    Long column
    Weak column
    Medium column

    8. The specific gravity of water is taken as

    9. An error of 1% in measuring head over the crest of the notch (H) will produce an error of __________ in discharge over a triangular notch,
    1 %
    1.5 %
    2 %
    2.5 %

    10. In a cold chamber die casting machine, only nonferrous alloys with _________ are casted.
    Low melting temperature
    High melting temperature
    Both (A) and (B)
    None of these

    11. A flow in which the quantity of liquid flowing per second is not constant, is called
    Streamline flow
    Turbulent flow
    Steady flow
    Unsteady flow

    12. In spot welding, the spacing between two spot weld should not be less than
    1.5 d
    3 d
    6 d

    13. The power transmitted by a belt drive is maximum when the maximum tension in the belt is __________ the centrifugal tension.
    Equal to
    Three times
    Six times

    14. The factors to be considered for production scheduling are
    Component design
    Route sheet
    Time standards
    All of these

    15. Oil separator in a refrigeration cycle is installed
    Before compressor
    Between compressor and condenser
    Between condenser and evaporator
    Between condenser and expansion valve

    16. The cavitation in a hydraulic machine is mainly due to
    Low velocity
    High velocity
    Low pressure
    High pressure

    17. In order to cut mild steel, the cutting angle of chisel should be ________degree.

    18. A ship with jet propulsion draws water through inlet orifices at right angles to the direction of its motion. The propelling force of the jet is "waVr /g × (Vr - v)".
    (where a = Area of the jet, Vr = Relative velocity of the jet and ship = V + v, v = Velocity of the ship, and V = Velocity of the jet issuing from the ship)
    There is no Solution
    Data is incorrect

    19. The boiling point of carbon dioxide is

    20. The thrust force will increase with the increase in
    Side cutting edge angle
    Tool nose radius
    Rake angle
    End cutting edge angle

         Score =

    Correct answers:

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    Item Reviewed: Test Quiz Mechanical Engineering - Set 23 Rating: 5 Reviewed By: Pranab Debnath
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