# Study Guide Tech

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1. Evaluate 5(xy)/Y+8+5,Y=-2

a) 10/11
b) -10/11
c) 10/15
d) -10/15
• B -10/11
• 5(1*-2)/-2+8+5= 5(-2)/11=-10/11
2. What is the raised part of a shaft called?

a) Bearing
b) crown
c) Shoulder
d) Shelf
C - Shoulder
3. What does an inductor do?

a) Acts as a filter and opposes any changes in current
b) Acts as a resister to voltage
c) Blocks AC
d) Blocks DC
A - Acts as a filter amd opposes any change in current
4. Solve for L when the inductive reactance equals to 6280 ohms at 1000hz
a) 6.280 Ohms
b) 628H
c) 6.28kH
d) 1H
D - 1H
5. What type of bearing should not be greased?
a) A roller bearing
b) A permanent seal bearing
c) A ball bearing
B - A permanent seal bearing
6. What type of coupling is used in power supply transformers?
a) Reactance
b) Conductance
c) Electrical
d) Mutual Inductance
D - Mutual Inductance
7. How would you seat a bearing, by using the outer surface or inner surface?
a) Inner, with a brass hammer
b) Inner, with an arbor press
c) Outer
d) None of the above
C - By applying preassure to the outer surface
8. Why are key ways placed on a shaft?
a) To keep the pulley or gear from turning on the shaft
b) So you can lock and unlock them
c) So another shaft can interlock with the first shaft
d) So the key stock has a place to go
A - To keep the pulley or gear from turning on the shaft
9. What is the name of a key that is placed in the keyway that has one side flat and the otherrounded?
a) Key stock
b) Turn key
c) Woodruffkey
d) Salvatore key
C - Woodruffkey
10. What kind of solder is not used on electronic circuitry?
a) Rosin core
b) Acid core
c) Silver solder
d) b and c
D - Silver & Acid core
11. What is the truth table for an OR Gate?
• A B Y
• 0 0 0
• 0 1 1
• 1 0 1
• 1 1 1
12. What is essential about oil?
a) Viscosity
b) Cleanliness
d) All of the above
D - Proper viscosity
13. Whut is the difference between oil and grease?
a) Oil requires a reservoir
b) Oil has lower viscosity
c) Oil flows
d) All of the above
D - Oil flows and has a lower viscosity than grease and it also requiers a resivoir
14. What is 90W oil typically used for?
a) Chains
b) Gearboxes
c) Bearings
d) All of the above
B - 90W oil is typically used in gear boxes
15. The number 6-32 means what to a screw or a bolt?
a) 6mm, 32 threads per inch
b) 6 threads per inch and 32mm long
c) number 6 with 32 threads per inch
d) None of the above
C - 6 is the size of the shaft, 32 is the number of threads per inch
16. What does 1/4 - 20 mean on a screw or bolt?
a) 1/4 shaft,20 threads per inch
b) 1/4 pitch,20mm long
c) number 1, 4mm shaft, 20mm long
d) None of the above
A - 1/4 is the size of the shaft, 20 is the number of threads /inch
17. Is high viscosity oil used on chains or low viscosity oil, or low or high viscosity grease?
a) Low viscosity grease
b) High viscosity grease
c) Low viscosity oil
d) High viscosity oil
C - Low viscosity oil (Ex: 10W)
18. Why would a stethoscope be used on a conveyor system?
a) Listen for electronic heartbeat
b) Listen for motor synchronization
c) Listen for timing pulses
D - To locate noisy bearings
19. What type of waveform is pictured in Figure 5?
a) Saw tooth wave
b) Sinusoidal wave
c) Square waved
d) Pulsating wave

~
B - Sine wave
20. In figure 4 if the settings are 5V/div and 5ms what is the voltage of the signal?
a) 15ms
b) l5V
c) 5V
d) 5ms
B - 15V
21. The meter in figure 1 is set for DCV on the 250V scale, what is the reading?a) 66 Ohms
b) 80 VAC
c) 80 VDC
d) 56 VDC
C - 80 VDC
22. What type of waveform is Figure 4?
a) Saw tooth wave
b) Sinusoidal wave
c) Square wave
d) Pulsating wave
C Square wave
23. What type of meter is being used in figure 10?
a) Ohm meter
b) Ammeter
c) Voltmeter
d) Multimeter
A - Ohm meter
24. What is pictured in figure 14?
a) Cylindrical Cam
b) Cam follower
c) Eccentric Cam
d) Edge Cam
D - Edge Cam
25. What is the reading of the meter in figure 8?
a) 3k Ohms
b) 6mA
c) 24V
d) 18V
D - 18V
26. What is the next number in the sequence: 1,4,16,64,?
a) 128
b) 16
c) 256
d) 82
C - 256
27. What tool is best suited to remove debris from a grind stone?
a) Chisel
b) Dressing tool
c) Stone cleanser
d) Aluminum
B - Dressing Tool
28. What means are used to remove slack from a convoy belt?
a) Screw, spring or gravity take-up
b) Cord, elastic, bearing take-up
c) Shims, gravity, tensioner
d) Diet
A - Screw, spring or gravity take-up
29. What tool is normally used to punch holes in sheet metal?
a) Metal punch
b) Wood chisel
c) Hole punch
d) Drill
A - Metal Punch
30. Why would you leave the fitting off a new bearing that has been filled with grease?
a) You want to make a mess
b) Run in time
c) To allow excess air and grease to be purged
d) None of the above
C - To allow excess air and grease to be purged
31. When choosing wiring for a circuit what should be considered?
a) Aesthetics
b) Detriment
c) Age
32. What kinds of coolants are used for drilling holes?
a) Cutting oil, soluble oil
b) Wesson oil, antifreeze
c) Water, grease
d) Rigid oil, heat sink grease
A - Cutting oil, soluble oil
33. What is a transistor made of?
a) Nina, Pinta, Santa Maria
b) Silicon, Germanium, gallium arsenide
c) Silicon, Arsenic, Geranium
d) Base, Emitter, Collector
B - Silicon, Germanium, gallium arsenide
34. How many leads does a transistor have?
a)2
b)4
c)1
d)3
D - 3
35. Name the leads on a transistor.
a) Gate, Source, Drain
c) Base, Collector, Emitter
C - Base, Collector, Emitter
36. How many leads does a MOSFET have?
a)2
b)4
c)1
d)3
D - 3
37. Name the leads in a MOSFET.
a) Gate, Source, Drain
c) Base, Collector, Emitter
A - Gate, Source, Drain
38. A 90-degree gearbox uses what weight of oil?
a) 10W
b) 90W
c) 40W
d) 50W
B - 90W
39. What type of fire extinguisher is used on electrical fires?
a) A,B,C
b) C, BC, ABC
c)A
d)B
B - C, BC, ABC
40. Why is it bad to mix cleaning chemicals?
a) Can produce a poisonous gas
b) Can be more expensive
c) Can Destroy Property
d) Your allowed to get high on the job
A - Can produce a poisonous gas
41. What factors should be considered when erecting a ladder?
a) The base
b) The makeup of the ladder
c) Height of the job, the distance the ladder is from the wall, type of job and capacity.
d) When lunch is, when break is, and why does everyone think you're paranoid
C - Height of the job, the distance the ladder is from the wall, type of job and capacity.
42. How far out should the bottom of a ladder go for each foot up?
a) The same distance
b) 1/2'
c) 1/4'
d) 1/3'
C - 1/4'
43. What color is the return wire of 110VAC?
a) Black
b) Red
c) Green
d) White
D - White
44. If you are unsure if a capacitor has a bleeder resister, then you should short it to ground to discharge it after power has been removed? T or F.
True
45. Who may remove a lockout?
b) You
c) The buddy with the extra key
d) The person who put it there
D - The person who put it there
46. Who is responsible for safety?
a) Each individual
b) Management
c) OSHA
d) Safety Officer
A - Each indivudual
47. When all phases are equal in a 4-wire wye circuit what should be the ampere reading on the return line?
a) Vcc
b) 0 Amps
c) 120VAC
d) 480VAC
B - 0 amps
48. What is the purpose of a rheostat?
a) Temperature control
b) Potentiometerreplacement
c) Speed control in motors, adjusting lighting by controlling voltage
d) Switch
C - Speed control in motors, adjusting lighting by controlling voltage
49. What is the difference between a potentiometer and a rheostat?
a) Potentiometer has more resistance
b) A potentiometer can caffy more cuffent
c) A rheostat has more functions
d) A potentiometer has 3 leads, a rheostat has 2.
D - A potentiometer has 3 leads, a rheostat has 2.
50. Why should you never bridge a fuse with copper wire, a bullet or other material?
a) Damage to equipment
b) A major safety hazard to you and equipment.
d) It'11 speed up the repair time
B - A major safety hazard to you and equipment.
51. While working on a circuit and you are not near the circuit breaker box, what should be done?
a) Lock out and tag out equipment
b) Use the buddy system
c) Keep one hand behind you while working
d) Pray very loudly
A - Lock out and tag out equipment
52. Solder is made of lead and tin, what is the Vo of each?
53. What kind of solder is used on electronic circuits?
a) 60-40 acid core
b) 60-40 silver solder
c) 60-40 rosin core
d) 60-40-22 hike core
C - 60-40 rosin core
54. What does a good solder connector look like?a)
A A Volcano
b) A blob
c) Ron's mom
d) Smooth and shiny
D - Smooth and shiny
55. Electricity is the flow of what?
a) Voltage
b) Electrons
c) Protons
d) Neutrons
B - Electrons (current)
56. What is the measuring unit name of current?
a) Electrons
b) Ampere
c) Volt
d) Power
B - Ampere
57. What are the formulas for Ohm's Law?
a) V=IR, I=V/R, R=V/I
b) V=IR, I=R/V, P=I2R
c) P=I2R, I2=R/P, V=IR
d) V=IR, I=R/V, R=V/I
A - V=IR, I=V/R, R=V/I
58. Which follows Kirchhoff's Laws?
a) All currents coming into a node must leave the node
b) All currents are equal to the loop current
c) The sum of all voltages equals the supply Voltage
d) Ohm had an ugly pocket protector
A - All currents coming into a node must leave the node
59. What is a counter sink bit use for?
a) It is used to make a recess, cone shaped holes
b) It is used counter sink screws
c) A and B
d) None of the above
C - A and B
60. What is the opposition to current flow in a capacitive circuit called?
a) Impedance
b) Resistance
c) Xc
d) XL
C - Xc
61. What is the opposition to current flow in an inductive circuit called?
a) Impedance
b) Resistance
c) XL
d) Xc
C - XL
62. What is the opposition to the flow of A.C. current?
a) Impedance
b) Resistance
c) Xc
d) XL
A - Impedance
63. What is the opposition to the flow of D.C. current?
a) Impedance
b) Resistance
c) Xc
d) XL
B - Resistance
64. What is the best tool for resurfacing the face of a chisel?
a) Grinder
b) Dressing tool
c) Stone cleanser
d) File
A - Grinder
65. What is Firmware?
a) Data stored in a computer's read-only memory
b) Data stored in a computer's random access memory
c) Hard disk
d) Chip
A - Data stored in a computer's read-only memory
66. 25 is what % of 75?
a) 30.37%
b) 33.7%
c) 33.3%
d) 3.33%
C - 33.3%
67. 67) Change decimal 78 to binary?
a) 1011010
b) 1010110
c) 1101110
d) 1001110
D - 1001110
68. Convert 600ms to s
a) .060s
b) 60.0s
c) 600,000s
d) .600s
D - .600s
69. A capacitor blocks and passes what?
a) DC, passes AC
b) AC, passes DC
c) Reactance,Impedance
d) Resistance,Reactance
B - AC, passes DC
70. Why is the tip of a solder iron tinned?
a) To clean the tip for better soldering
b) For the solder to be melted and transferred to the component
c) For a heat sink
d) To remove lead from the tip
A - To clean the tip for better soldering
71. What metal is the tip of a solder iron normally made of?
a) Iron
b) Copper
c) Titanium
d) Nickel
B - Copper
72. A cold solder joint increases what?
a) Heat sink
b) Reactance
c) Resistance
d) Solder usage
C- Resistance
73. What is used to remove the rough edge of a freshly cut pipe?
b) Sander
c) Reamer
d) Pipe edger
C - Reamer
74. An electrical magnetic device which pulls in a plunger is called what?
a) Relay
b) Solenoid
c) Contactor
d) Circuit Breaker
B - Solenoid
75. The X-axis on an oscilloscope screen represents what?.
a) The 10X probe
b) Voltage
c) Frequency
d) Time
D - Time
76. What is the housing of an electronic circuit called?
a) Housing
b) Container
c) Circuit board
d) Chassis
d - Chassis
77. What common device can be used to convert analog to digital?
a) Diode
b) Transistor
c) Transformer
d) D to A converter
A - Diode
78. What does a clutch allow for?
a) Engaging and disengaging
b) Braking
c) Vibration
d) Grip
A - Engaging and disengaging
79. The truth table for a NOR gate looks like what other gate truth table?
a) No other gate
b) An AND gate
c) A Demorgan's equivalent
d) An XOR gate
C - A Demorgan's equivalent
80. What does the color band on a diode indicate?
a) It's resistance
b) That it's azener diode
c) A resistor must be connected to the input
d) The cathode
D - The cathode
81. What is the best device for soldering a transistor on a PC board?
a) A soldering gun
b) Crazy glue
c) Pencil type soldering iron
d) A heat strip
C - Pencil type soldering iron
82. Why is flux used in soldering?
a) For heat conduction
b) For cooling
c) For time travel
d) For cleaning
d - For cleaning
83. Why is acid core colder not used in electronics?
a) It is corrosive to the leads and traces
b) The ph level is wrong
c) It destroys the soldering tip
d) It has a core
A - It is corrosive to the leads and traces
84. What device converts electrical energy to mechanical energy?
a) Motor
b) Generator
c) Transducer
d) Mutual inductance
A - Motor
85. What device converts mechanical energy to electrical energy?
a) Motor
b) Generator
c) Transducer
d) Mutual inductance
B - Generator
86. A _ converts one type of energy to another.
a) Motor
b) Generator
c) Transducer
d) Mutual inductance
C- Transducer
87. Find XL of a 10H inductor at 60HZ.
a) 3.768 Ohms
b) 3768 Ohms
c) 265 uOhms
d) 37.68 Ohms
B - 3768 Ohms
88. What action should be taken when a drill motor cord is damaged?
a) Splice the cord and use heat shrink tubing to seal it
b) Solder the connection back together and use heat shrink tubing
c) Replace the cord
C - Replace the cord
89. What is the OEM number for the capacitor in Figure 19?
a) 5963-04-00-7038
b) 196
c) 265406
d) 51880
D - 51880
90. What tool is used to remove the head of a rivet?
a) Metal Chisel
b) Grinder
c) Wood Chisel
d) Screwdriver
A - Metal Chisel
91. What tool is used to turn a large pipe?
a) A chain wrench
b) A strap wrench
c) Neither A or B
d) A and B
D - A and B
92. What is a spanner wrench used for?
a) Prying a distance between to nuts
b) To turn to syncchronous nuts at the same time
c) To drum star spangled banner on your toolbox
d) To remove a spanner nut
D - To remove a spanner nut
93. Name the parts of a Venier Caliper
See KSA 31
94. Name parts of the micrometer
See KSA 31
95. A VOM should be turned to what setting when not in use?
a) Park
b) Off
c) Voltage
d) Current
B - Off
96. If testing 120V on a VOM meter set on Ohm 1K, what would be the reading?
a) .120VAC
b) 120 Ohms
c) 120 VOhms
97. If the multimeter is set to Ohm X10 whar is the reading of Figure 2?
a) 280 Ohms
b) 28 Ohms
c)24 Ohms
d) 240 Ohms
A - 280 Ohms
98. What type of current is commonly applied to a transformer?
a)AC
b) DC
c) Electron
d) Inductance
A - Alternating Current (AC)
99. What is the mechanical advantage of figure 15 if H is 3 and L is 15?
a) 5:1
b) 15:3
c) 45
d) 5
A - 5:1
100. What are the parts to a motor?
a) Generator, commutator, brushes.
b) Armature, Field coil, compressor, brushes.
c) Armature, Field magnet, commutator, brushes.
d) Rotor, stator, Chassis
C - Armature, Field magnet, commutator, brushes.
101. What equipment should be wom when grinding?
a) Body armor
b) Goggles
c) Kevlar
d) Mouthpiece
102. What can be the effects of sparks in a battery room?
a) None
b) Explosion
c) Mar the floor
d) Indicate an open
B - Explosion
103. Force is defined as any action that tends to produce or modify
a) Power
b) Friction
c) Motion
d) Strength
C - Motion
104. What is a tap used for?
a) To probe a closed line
b) To hammer a brass fitting
d) None of the above
105. What is a feeler gauge used for?
a) To probe for loose nuts
b) To check gauge accuracy
c) To gauge spring tension
d) To set or measure gap
D - To set or measure gap
106. Why is a soldering gun not used in electronics?
a) High wattage
b) Low wattage
c) Too small
d) Wrong ammo
A - High wattage and to large for many applications
107. When soldering, solder is placed where?a) The lead or part to be soldered
b) The soldering iron tip
c) The PCB port
A - The lead or part to be soldered
108. What is the solder iron used for in soldering?
a) Heating up solder
b) Higher wattage jobs
c) A sand wedge
d) Smaller wattage jobs
D - Smaller wattage jobs
109. How is the "chatting" eliminated on an electrical motor braking system?
a) Slow the motor down
b) Decrease the motor torque
110. Why is a capacitor used across the contacts of a relay?
a) To block AC
b) To pass DC
c) Prevent arching
d) Lower capacitive reactance
C - prevent Arching
111. Why is a diode used across the coil of a relay?
a) Prevents de-energizing coil voltage from being reintroduced into the line
b) Turns coil voltage to DC
c) Rectifies signal
d) To ground AC
A - Prevents de-energizing coil voltage from being reintroduced into the line
112. Why is an electrolytic capacitor bias important?
a) They are polarized and reverse bias can make them explode
b) They will not conduct properly
c) They will act as an inductor
d) They will pass DC
A - They are polarized and reverse bias can make them explode
113. What type of spring would you use to close a door?
a) Compression
b) Helical
c) Torsion
d) Tension
D - Tension
114. When installing an electrolytic capacitor in a circuit, what precaution must be observed?
a) That there is only DC in the circuit
b) Polarity
c) That they have proper inductance
d) That the coil voltage is high enough
B - Polarity
115. Why are the leads of electrical component scratched?
a) To remove any pitting
b) achieve better conductivity
c) To remove static discharge
d) A and B
D - A and B
116. Why are chain guards used?
a) To protect chains
b) To safeguard against injury
c) To keep chains on track
d) Because guns aren't allowed in the Postal Service
B - To safeguard against injury
117. Solve 18.972 I 3.6 =
a) 6
b) 5.32
c) 5.27
d) 5.16
C - 5.27
118. Evaluate 8XY / 2 = ?,X = 2,Y = -3
a) -24
b) 24
c) -18
d) 18
a - -24
119. Convert 18 base ten to base 8
a) 228
b) 238
c) 328
d) 188
a - 228
120. Convert Z2base ten to base 8, 16, 2.
a) 288, 1616, 101102
b) 266, 1616, 101102
c) 268, 1816, 101102
d) 268, 1616, 111102
B - 266, 1616, 101102
121. 357o of 9O
a) 32
b) 31.5
c) 31
d) 32.5
B - 31.5 (90* .35)
122. 12pF to uF
a) .000012uF
b) 12,000uF
c) 12,000,000uF
d) 12,000,000,000uF
A - .000012uF
123. A zener diode is used to regulate what?a) Current
b) Reactance
c) Voltage
d) Power
C - Voltage
124. An NPN uses what kind of polarity voltage at its base to tum it on?
a) Positive
b) Capacitive
c) Negative
d) Inductive
A - Positive ( Emitter, Collector = Negative)
125. In figure 18, what is R,
a) 10 Ohms
b) 40 Ohms
c) 20 Ohms
d) 100 Ohms
A - 10 Ohms

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 Author: LocoPr ID: 93960 Filename: Study Guide Tech Updated: 2011-07-21 02:17:37 Tags: questions Folders: Description: Tech Study Show Answers:

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