Solar Man Australia Project - Wind Turbine Design And Development

60 Questions | Total Attempts: 162

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Solar Man Australia Project - Wind Turbine Design And Development - Quiz


Questions and Answers
  • 1. 
    Most of the solar radiation received on earth surface lies within the range of........
    • A. 

      0.2 to 0.4 microns

    • B. 

      0.38 to 0.78 microns

    • C. 

      0 to 0.38 microns

    • D. 

      0.5 to 0.8 microns

  • 2. 
    For satellite the source of energy is........
    • A. 

      Cryogenic storage

    • B. 

      Battery

    • C. 

      Solar cell

    • D. 

      Any of the abov

  • 3. 
    The output of solar cell is of the order of........
    • A. 

      1 W

    • B. 

      5 W

    • C. 

       10 W

    • D. 

      15 W

  • 4. 
    Gain of an amplifier = 400, input signal to an amplifier = 0.5 cos (313 t). The output signal is represented as
    • A. 

      20 sin (403 t)

    • B. 

      20 cos (403 t)

    • C. 

      400 cos (313 t)

    • D. 

      400 cos (313 t + 90°)

  • 5. 
    Microwave energies propagate the length of the waveguide by __________ its side walls.
    • A. 

      Refraction off

    • B. 

      Reflection off

    • C. 

      Moving off

    • D. 

      None of the above

  • 6. 
    Two entities that are combined to form a Magic Tee ar
    • A. 

      One H? and two E plane tees

    • B. 

      One H? and one E plane tee

    • C. 

      Two H? and two plane tees

    • D. 

      Two H? and one E plane tee

  • 7. 
    Consider reciprocal of capacitance and torsional spring stiffness as analogous quantities. The system is considered as
    • A. 

      Torque - voltage

    • B. 

      Torque - current

    • C. 

      Force - voltage

    • D. 

      Force - current

  • 8. 
    Under mechanical rotational system and electrical system the quantities that are not analogous are
    • A. 

      Angular velocity and current

    • B. 

      Angular displacement and charge

    • C. 

      Viscous friction and coefficient resistance

    • D. 

      Moment of inertia and conductance

  • 9. 
    An ideal current source has zero
    • A. 

      Internal resistance

    • B. 

      Internal conductance

    • C. 

      Ripple

    • D. 

      Voltage on the load

  • 10. 
    To carry a current of 0.3 amperes, a 100 ohm resistor is needed in an electric circuit. A resistor you would select is
    • A. 

      100 ohm, 7.5 watts

    • B. 

      100 ohm, 10 watts

    • C. 

      100 ohm, 1 watt

    • D. 

      100 ohm, 5 watts

  • 11. 
    The vertical distance between the axis of the beam before and after loading at a point is called as 
    • A. 

      Deformation

    • B. 

      Deflection

    • C. 

      Slope

    • D. 

      None of the above

  • 12. 
    The wind intensity can be described by
    • A. 

      Reynolds number

    • B. 

      Mach number

    • C. 

      Beaufort number

    • D. 

      Froude number

  • 13. 
     Ward-Leonard system of system of speed control is not recommended for
    • A. 

      Constant speed operation

    • B. 

      Wide speed

    • C. 

      Frequent-motor reversed

    • D. 

      Very slow speed

  • 14. 
    Mark the wrong option. Which of the following cause and effect behaviour in speed control is correct when field resistance is increased.
    • A. 

      Decrease in flux

    • B. 

      Decrease in flux

    • C. 

      Increase in EMF

    • D. 

      Decrease in speed

  • 15. 
     Small DC motors have best speed control by
    • A. 

      Armature voltage control

    • B. 

      Field resistance control

    • C. 

      Any of the methods

    • D. 

      None of the mentioned

  • 16. 
    The short circuit load losses is/are
    • A. 

      Direct load loss and stray load losses

    • B. 

      Direct load loss

    • C. 

      Stray load losses

    • D. 

      Field current loss

  • 17. 
    The coupling angle or load angle of a synchronous motor is defined as the space angle between
    • A. 

      Rotor and stator poles of opposite polarity

    • B. 

      Rotor and stator poles of same polarity

    • C. 

      Rotor and stator teeth

    • D. 

      Rotor and resultant magnetic field

  • 18. 
     Large stiffness coefficient represents
    • A. 

      Motor speed remains practically constant

    • B. 

      Large fluctuations due to mechanical load

    • C. 

      Motor speed is variable to changes

    • D. 

      No such significance with speed

  • 19. 
    Which of the following is/are used in synchronous machines to maintain mechanical stability?
    • A. 

      Damper winding

    • B. 

      Interpole winding

    • C. 

      Compensating winding

    • D. 

      Equalizer rings

  • 20. 
     Electromagnetic torque is present in rotating machines when
    • A. 

      Both stator and rotor windings carry current

    • B. 

      Rotor windings carry current

    • C. 

      Stator windings carry current

    • D. 

      Any of the mentioned

  • 21. 
    The operation of a synchronous motor operating on constant excitation across infinite bus will not be stable if power angle δ
    • A. 

      Exceeds internal angle θ

    • B. 

      Is less than θ

    • C. 

      Is more than θ/2

    • D. 

      Is less than θ/2

  • 22. 
    Who invented the first electricity-generating wind turbine?
    • A. 

      French engineer Georges J. M. Darrieus

    • B. 

      Scottish engineer James Blyth

    • C. 

      American inventor Benjamin Franklin

    • D. 

      American inventor Charles F. Brush

  • 23. 
     How many blades does a modern wind turbine have?
    • A. 

      3

    • B. 

      2

    • C. 

      There is no standard number of blades.

    • D. 

      4

  • 24. 
    Which of these is NOT a part of a modern wind turbine?
    • A. 

      Compressor

    • B. 

      Gear box

    • C. 

      Nacelle

    • D. 

      Yaw drive

  • 25. 
    How many different components does it take to build a utility scale wind turbine?
    • A. 

      More than 800

    • B. 

      More than 80

    • C. 

      More than 8,000

    • D. 

      More than 80,000

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