# Solar Man Australia Project - Wind Turbine Design And Development

60 Questions | Total Attempts: 162  Settings  • 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.

• 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.

• B.

• C.

• 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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