Page 361 - GMAT 2017b_Neatb

Electronics Information Test 1

61. The most likely cause of a burned-out fuse in the 68. Voltage drop in a circuit results from
primary circuit of a transformer in a rectifier is (A) inductance
(A) grounded of the electrostatic shield (B) capacitance
(B) an open circuit in a bleeder resistor (C) resistance
(C) an open circuit in the secondary winding (D) conductance
(D) a short-circuited filter capacitor
69. Which of the following sizes of electric heaters is the
62. The primary coil of a power transformer has 100 turns, largest one that can be used in a 120-volt circuit
and the secondary coil has 50 turns. The voltage across protected by a 15-ampere circuit breaker?
the secondary will be (A) 1000 watts
(A) four times that of the primary (B) 1300 watts
(B) twice that of the primary (C) 2000 watts
(C) half that of the primary (D) 2600 watts
(D) one fourth that of the primary
70. Of the following devices, which one will store an
63. The best electrical connection between two wires is electric charge?
obtained when (A) Capacitor
(A) the insulations are melted (B) Inductor
(B) all insulation is removed and the wires bound (C) Thyristor
together with friction tape (D) Resistor
(C) both are wound on a common binding post
(D) they are soldered together 71. Of the nonmetallic elements listed, which one is the
best conductor of electricity?
64. Excessive resistance in the primary circuit will lessen (A) Mica
the output of the ignition coil and cause the (B) Carbon
(A) battery to short out and the generator to run down (C) Formica
(B) battery to short out and the plugs to wear out (D) Hard rubber
prematurely
(C) generator to run down and the timing mechanism 72. If an electric motor designed for use on AC is plugged
to slow down into a DC source, what will probably happen?
(D) engine to perform poorly and be hard to start. (A) Excessive heat will be produced
(B) It will operate the same as usual
65. During a “short circuit,” the (C) It will continue to operate but will not get so
(A) current flow becomes very large warm
(B) resistance becomes very large (D) It cannot be predicted what will happen
(C) voltage applied becomes very small
(D) power input becomes very small 73. Most electrical problems involving voltage,
resistance, and current are solved by applying
66. The main reason for making wire stranded is (A) Ohm’s law
(A) to make it easier to insulate (B) Watt’s law
(B) so that the insulation will not come off (C) Coulomb’s law
(C) to decrease its weight (D) Kirchoff’s voltage and current laws
(D) to make it more flexible
74. If every time a washing machine is started the circuit
breaker must be reset, the best solution would be to
(A) oil the motor in the washer
(B) replace the circuit breaker
(C) tape the breaker switch closed
(D) repair the timing mechanism

75. Electronic circuits designed to produce high-
67. The oscilloscope image shown above represents frequency alternating currents are usually known as
(A) steady DC (A) oscillators
(B) resistance in a resistor (B) amplifiers
(C) AC (C) rectifiers
(D) pulsating DC (D) detectors

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