Page 360 - GMAT 2017b_Neatb

Electronics Information Test 1

48. If a live conductor is contacted accidentally, the 54. Direct current arcs are “hotter” and harder to
severity of the electrical shock is determined primarily extinguish than alternating current arcs, so electrical
by appliances that include a thermostat are frequently
(A) the size of the conductor marked for use on “AC only”. One appliance that
(B) the current in the conductor might be so marked because it include a thermostat is
(C) whether the current is AC or DC a
(D) the contact resistance (A) soldering iron
(B) floor waxer
49. Locknuts are frequently used in making electrical (C) vacuum cleaner
connections on terminal boards. The purpose of the (D) household iron
locknuts is to
(A) eliminate the use of flat washers 55. An alternator is a(n)
(B) prevent unauthorized personnel from tampering (A) AC generator
with the connections (B) frequency meter
(C) keep the connections from loosening through (C) ground detector device
vibration (D) choke coil
(D) increase the contact area at the connection point.
56. Operating an incandescent electric light bulb at less
50. If a condenser is connected across the make-and-break than its rated voltage will result in
contact of an ordinary electric bell, the effect will be to (A) shorter life and brighter light
(A) speed up the action of the clapper (B) brighter light and longer life
(B) reduce the amount of arcing at the contact (C) longer life and dimmer light
(C) slow down the action of the clapper (D) dimmer light and shorter life
(D) reduce the load on the bell transformer or battery

51. A material NOT used in the makeup of lighting wires or
cables is
(A) rubber
(B) paper
(C) lead 57. The device shown above is a
(D) cotton (A) C- clamp
(B) test clip
VOLTMETER (C) battery connector
(D) ground clamp
GOOD GOOD 58. When the electric refrigerator in a certain household
LAMPS LAMPS
kitchen starts up, the kitchen light at first dims
considerably and then increases somewhat in
brightness while the refrigerator motor is running; the
BURNED OUT light finally returns to full brightness when the
LAMP refrigerator shuts off. This behaviour of the light
600 VOLTS shows that most likely the
(A) circuit wires are too small
52. The reading of the voltmeter above should be (B) refrigerator motor is defective
(A) 600 (C) circuit fuse is too small
(B) 300 (D) kitchen lamp is too large
(C) 120
(D) 0 59. A circular mil is a measure of electrical conductor
(A) length
53. Silver is a better conductor of electricity than copper; (B) area
however, copper is generally used for electrical (C) volume
conductors. The main reason for using copper instead (D) weight
of silver is its
(A) cost 60. The instrument by which electric power may be
(B) weight measured is a(n)
(C) strength (A) rectifier (B) scanner drum
(D) melting point (C) ammeter (D) wattmeter

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