Achr131 Module Final Review

50 Questions  I  By Azortex
Possible Multiple Choice Questions

  
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1.  A split-phase has a _____ winding and a _____winding.
A.
B.
C.
D.
2.  A split-phase motor can use a _____to energize and de-energize the start winding.
A.
B.
C.
D.
3.  A current magnetic relay opens and closes its contacts based on the _____.
A.
B.
C.
D.
4.  A permanent split capacitor (PSC) motor that is running and up to speed will have the start winding _____ .
A.
B.
C.
D.
5.  A split-phase motor that has a current relay and a start capacitor is called a _____motor.
A.
B.
C.
D.
6.  When a Capacitor Start, Capacitor Run (CSCR) motor initially starts, what is the total capacitance acting on the motor?  (Assume the run capacitor is 5 microfarads and the start capacitor is 20 microfarads.)
A.
B.
C.
D.
7.  When a Capacitor Start Induction Run (CSIR) motor is running and up to speed, what is the total capacitance acting on the motor?  (Assume the run capacitor is 5 microfarads and the start capacitor is 20 microfarads.)
A.
B.
C.
D.
8.  The starting device usually used on single phase, fractional horsepower compressor motors is the _____.
A.
B.
C.
D.
9.  A motor's speed is determined by _____.
A.
B.
C.
D.
10.  Start windings are placed _____the run windings.
A.
B.
C.
D.
11.  The start windings have _____.
A.
B.
C.
D.
12.  When a general duty split-phase motor reaches approximately 75% of its operating speed, the start winding is de-energized by a _____.
A.
B.
C.
D.
13.  Capacitors wired in series with the starting winding provide _____.
A.
B.
C.
D.
14.  The shaded pole motor _____.
A.
B.
C.
D.
15.  Three phase motors have _____.
A.
B.
C.
D.
16.  The positive-temperature-coefficient start device is a type of _____.
A.
B.
C.
D.
17.  A permanent split-capacitor motor has a _____.
A.
B.
C.
D.
18.  When referring to motors, to what does the "insulation class" relate?
A.
B.
C.
D.
19.  Why are explosion-proof motors not normally used on standard equipment?
A.
B.
C.
D.
20.  The motor that should be used in a potentially wet area is a(n) _____motor.
A.
B.
C.
D.
21.  Which of the following voltages are not safe for a 208-V motor to operate?
A.
B.
C.
D.
22.  A sleeve bearing would typically be used in a motor that operates with a _____.
A.
B.
C.
D.
23.  If the voltage supplied to the motor is well below the motor rated voltage, the current draw will be _____it should be.
A.
B.
C.
D.
24.  The voltage tolerance of a standard electric motor is _____.
A.
B.
C.
D.
25.  The locked-rotor amperage is normally _____times as great as the run-load amperage.
A.
B.
C.
D.
26.  A direct-drive motor is usually connected to a load with a _____.
A.
B.
C.
D.
27.  The width of a drive belt is classified as _____.
A.
B.
C.
D.
28.  An instrument often used to check the alignment of two shafts is the _____.
A.
B.
C.
D.
29.  A slotted screw at the bottom of the bearing housing is called a _____.
A.
B.
C.
D.
30.  Grounding straps are required on resilient mounted motors to _____.
A.
B.
C.
D.
31.  When a contractor's coil is energized, how much resistance should be measured between terminal "L1" and terminal "T1"?
A.
B.
C.
D.
1 comment
32.  Technician "A" says that if you take a voltage reading from terminal "L1" to terminal "T1" on a contactor whose coil is energized, you should read zero volts.  Technician "B" says that contactors can only have normally open contacts.  Which of the following statements is correct?
A.
B.
C.
D.
33.  An inherent motor protector is a _____ .
A.
B.
C.
D.
34.  The service factor of an electric motor is determined by _____.
A.
B.
C.
D.
35.  Which of the following overload devices is not affected by ambient temperature?
A.
B.
C.
D.
36.  Standards for motor overload protection are set by the _____.
A.
B.
C.
D.
37.  A common practice in condensing units is to use a contactor with only one set of contacts opening only one side of the power to the unit.  This is to _____.
A.
B.
C.
D.
38.  Beside maintaining pressure on the contacts for current carrying capacity, the pressure springs have a second important function.  This is to _____.
A.
B.
C.
D.
39.  What is the best method to repair a fractional horsepower motor that has bad bearings?
A.
B.
C.
D.
40.  A technician needs to check a single-phase compressor. He labels the three terminals "A," "B," and "C" and take resistance readings of the windings.  He reads 10 ohms from "A" to "B," infinity from "B" to "C," and infinity from "C" to "A."  Identify the terminals.
A.
B.
C.
D.
41.  Technician "A" says that a shorted winding will result in an increased current flow through the winding.  Technician "B" says that if a motor is to be replaced, a motor with a lower horsepower rating should always be used.  Which of the following statements is correct?
A.
B.
C.
D.
42.  Technician "A" says that while checking the windings of a compressor, a reading of 10 ohms or less from the common terminal to ground indicates that the motor is okay.  Technician "B" says that the resistance of the start winding should always be less than the resistance of the run winding.  Which of the following statements is correct?
A.
B.
C.
D.
43.  If a motor hums but does not start, there is a potential problem _____ .
A.
B.
C.
D.
44.  An open winding in an electric motor means that _____ .
A.
B.
C.
D.
45.  If the resistance of the run winding decreases, the _____ .
A.
B.
C.
D.
46.  The wiring and connectors that carry the power to a motor must be in good condition.  When a connection becomes loose, oxidation of the copper wire occurs.  The oxidation _____ .
A.
B.
C.
D.
47.  A megger _____ .
A.
B.
C.
D.
48.  The recommended way to discharge a capacitor is to _____ .
A.
B.
C.
D.
49.  If a condenser fan motor grounds out, it will usually _____ .
A.
B.
C.
D.
50.  Most electrical problems with an electric motor are _____ .
A.
B.
C.
D.
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