Exam 0310 Module Three Review and Practice Test

• 1.

  Conventional menstruation is:

  • A.

    Ever from negative to positive

  • B.

    In the same direction every bit electron movement

  • C.

    In the opposite direction to electron motility

• 2.

  The power cistron in an AC excursion is the same every bit:

  • A.

    The sine of the phase angle

  • B.

    The cosine of the phase bending

  • C.

    The tangent of a phase angle

• 3.

  A rider cabin has 110 passenger reading lamps each rated at 10W 28V. What is the maximum load current imposed by these lamps?

  • A.

    25.5 A

  • B.

    39.3 A

  • C.

    308 A

• 4.

  Ii isolated charges have dissimilar polarities. The forcefulness betwixt them will be:

  • A.

    A force of attraction

  • B.

    A force of repulsion

  • C.

    Zero

• 5.

  The relationship between voltage (5), current (I) and resistance (R) for a resistor is:

  • A.

    V = IR

  • B.

    V = R/I

  • C.

    Five = IR * R

• half dozen.

  A potential difference of 7.5 Five appears across a 15-ohm resistor. Which of the following is the current through the resistor?

  • A.

    0.25 A

  • B.

    0.5 A

  • C.

    2 A

• 7.

  Which one of the following gives the symbol and abbreviated unit for electrical charge?

  • A.

    Symbol, Q ; unit, C

  • B.

    Symbol, C ; unit, Five

  • C.

    Symbol, C ; unit, F

• viii.

  

  The unknown electric current shown in the figure will be:

  • A.

    11 A flowing towards the junction

  • B.

    17 A flowing away from the junction

  • C.

    41 A flowing away from the junction

• ix.

  An aircraft supply has an RMS value of 115 V. Which one of the following gives the estimate peak value of the supply voltage?

  • A.

    67.5 5

  • B.

    115 V

  • C.

    163 V

• 10.

  An AC waveform has a period of 4 ms. Which one of the post-obit gives its frequency?

  • A.

    25 Hz

  • B.

    250 Hz

  • C.

    4 kHz

• eleven.

  Which one of the post-obit gives the angle between the successive phases of a three-stage supply?

  • A.

    60 degrees

  • B.

    xc degrees

  • C.

    120 degrees

• 12.

  The peak value of current supplied to an aircraft TRU is 28 A. Which 1 of the following gives the gauge value of RMS current supplied?

  • A.

    10 A

  • B.

    14 A

  • C.

    twenty A

• 13.

  A transformer has 2400 main turns and 600 secondary turns. If the primary is supplied from a 220 VAC supply, which one of the following gives the resultant secondary voltage?

  • A.

    55 5

  • B.

    110 V

  • C.

    880 5

• xiv.

  

  Identify the components shown.

  • A.

    Generators

  • B.

    Inductors

  • C.

    Transformers

• 15.

  Decreasing the current in the field ringlet of a DC generator will:

  • A.

    Subtract the output voltage

  • B.

    Increase the output voltage

  • C.

    Increase the output frequency

• 16.

  The rotor of an induction motor consists of:

  • A.

    A laminated iron cadre inside a 'squirrel muzzle' made from copper or aluminum

  • B.

    A series of coil windings on a laminated fe core with connections via slip rings

  • C.

    A unmarried copper loop which rotates inside the field created past a permanent magnet

• 17.

  The skid speed of an AC induction motor is the difference between:

  • A.

    The synchronous speed and the rotor speed

  • B.

    The frequency of the supply and the rotor speed

  • C.

    The maximum speed and the minimum speed

• 18.

  When compared with 3-phase consecration motors, a single stage induction motors:

  • A.

    Are non 'inherently' cocky-starting

  • B.

    Take more complicated stator windings

  • C.

    Are significantly more efficient

• nineteen.

  A iii-stage induction motor has three pairs of poles and is operated from a 60Hz. Which one of the following gives the motor's synchronous speed?

  • A.

    1200 rpm

  • B.

    1800 rpm

  • C.

    3600 rpm

• 20.

  In a star-continued three-phase organisation, the line voltage is establish to exist 200V. Which one of the following gives the approximate value of stage voltage?

  • A.

    67 V

  • B.

    115 Five

  • C.

    346 V

• 21.

  A single-phase AC generator has twelve poles and it runs at 600 rpm. Which of the following gives the output frequency of the generator?

  • A.

    50 Hz

  • B.

    60 Hz

  • C.

    120 Hz

• 22.

  The skid rings in an Air-conditioning generator provide a means of:

  • A.

    Connecting an external circuit to a rotating armature winding

  • B.

    Supporting a rotating armature without the need for bearings

  • C.

    Periodically reversing the current produced by an armature winding

• 23.

  The commutator in a DC generator is used to:

  • A.

    Provide a ways of connecting an external field current supply

  • B.

    Periodically contrary the connections to the rotating coil winding

  • C.

    Disconnect the coil winding when the induced current reaches a maximum value

• 24.

  The brushes fitted to a DC motor/generator should have:

  • A.

    Low coefficient of friction and low contact resistance

  • B.

    High coefficient of friction and depression contact resistance

  • C.

    Low coefficient of friction and loftier contact resistance

• 25.

  In a shunt-wound generator:

  • A.

    None of the armature current flows through the field

  • B.

    Some of the armature current flows through the field

  • C.

    All of the armature current flows through the field

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Source: https://www.proprofs.com/quiz-school/story.php?title=aircraft-electrical-electronics-system

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