WorksheetsSTAR EXAM 4
Total questions: 25
Worksheet time: 13mins
76. Capacitance represents a components ability to
conduct flow electrons
resist flow of electrons
store electrons
create electrons
77. A meter with the capacity to measure very high resistances is call a?
ammeter
digital voltmeter
analog voltmeter
megger
78. A technician would use a micron gauge to measure?
suction pressure
deep vacuum
discharge pressure
electric current
79. If a technician has set his VOM meter to R x 100 he would be measuring
resistance.
voltage
amperage
capacitance
80. When checking resistance through a motor winding the proper instruments to use would be a/an?
megger
voltmeter
ammeter
ohmmeter
81. An ohmmeter will measure infinite resistance when testing an
open fuse
open contacts
closed contacts
both A and B
82. If a technician has placed his VOM in parallel with an energized load he is probably checking?
voltage
resistance
amperage
Ohm’s
83. When a technician is checking unknown _______ he should always set the instrument to the highest scale to prevent damage to the meter.
voltage
amperage
Ohm’s
both A & B
84. If a technician has placed his VOM in series with the load he is probably checking?
voltage
resistance
amperage
Ohm’s
Which of the following instruments would be used to check the condition of insulation on a motors windings?
ammeter
ohmmeter
voltmeter
megohmmeter
86. A ladder diagram can also be called
a pictorial diagram
an oblique diagram
an orthographic projection
electrical line wiring diagram
87. A pictorial diagram will?
use symbols that indicate function of equipment
emphasize "flow" of system
show approximate location of electrical system components
not show approximate location of electrical system components
88. The primary and secondary windings in a transformer are wired in?
series
parallel
not connected electrically
series-parallel
89. What happens when the length of the path of an electrical circuit is decreased?
there will be a no change in total circuit resistance
there will be an increase in total circuit current
there will be an increase in total circuit resistance
there will be a decrease in total circuit resistance
90. What is the total amperage of a circuit when two 25 ohm resistors are connected in series using a 120 volt power source
8 amps
3.2 amps
2.4 amps
375 milliamps
91. If the voltage is the same across each load in a circuit it would be considered?
parallel circuit
series circuit
series-parallel circuit
open circuit
92. If a circuit is designed to allow the flow of electrons to follow only one path it would be?
a series-parallel circuit
a parallel circuit
a series circuit
rectifier circuit
93. A line or ladder type diagram is most useful for?
showing the physical positions of the systems components
understanding circuit operation
doing the actual wiring
showing the color coding of wiring
94. If a technician took a reading across a normally closed set of contacts
when a relay or contactor coil was de-energized the reading would be?
0 volts
source voltage
0 ohms
circuit amperage
95. An ohmmeter must never be connected to a,
series-parallel circuit
parallel circuit
a de-energized circuit
energized circuit
96. If a 24 volt control transformer has a VA rating of 60 what is the maximum amperage rating?
.06 amp
.6 amp
2.5 amp
9.6 amp
97. A technician has obtained the following resistance readings across the terminals on a single phase compressor: 8 ohms from T1 to T3, 3 ohms from T1 to T2, and 5 ohms from T2 to T3. Which terminals are RUN,
START, and COMMON? Use the example below to answer this question
T1 is Common
T2 is Run
T3 is Start
T1 is Start
T2 is Common
T3 is Run
T1 is Run
T2 is Start
T3 is Common
T1 is Run
T2 is Common
T3 is Start
98. The contacts of a current relay
use back voltage (EMF) from the run winding to operate
use back voltage (EMF) from the start winding to operate
are normally open contacts
are normally closed contacts
99. A motor starter is also called a?
motor controller
start relay
current relay
potential relay
100. If a relay coil is open the technician would read ______ when checking if with his ohmmeter
infinite resistance
zero resistance
some resistance
both A or B
