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M7 > 7.3 Tools > Flashcards

7.3 Tools Flashcards

1
Q

What do combination sets have?

A

Ruler
Protractor
Level

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2
Q

What should be used to cut through sheet metals and what for tougher materials?

A

Sheet metal with aviation snips
Hacksaws with fine toothed blades for tougher materials

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3
Q

What are two taps and dies used for?

A

Thread cutting

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4
Q

What are the parts of a screwdriver?

A

Tip/ blade; shank and handle

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5
Q

What is a basic description of a screw?

A

A machined bolt with a thread cut in to it with a countersunk or protruding head that a cavity is cut in to to apply torque

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6
Q

What is the handle of a screwdriver made of?

A

Wood or plastics that are non conductive of electricity or heat

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7
Q

What is the shank of a screw driver made from?

A

Carbon steel
Sometimes sheathed to protect user from eclectic shock

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8
Q

What is the blade or tip of a screwdriver made from?

A

Carbon steel but hardened to give protection and long life

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9
Q

How are screw drivers classified?

A

By their type of tip

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10
Q

What size are different screwdriver socket bits?

A

1/4 inch AF

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11
Q

How much of the screw slot dimensions must the screwdriver tip fill?

A

At least 75%

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12
Q

What is the point angle of a Phillips screw driver?

A

30 degrees

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13
Q

What is the point angle of a Reed & prince/ Frearson screwdriver?

A

V shape 45 degrees

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14
Q

What is the difference between a Phillips and Reed/ Frearson screwdriver?

A

Phillips has slightly larger centre in the cross
Phillips is blunt on the end

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15
Q

What do Frearson screw drivers allow for?

A

Higher torque to be applied and they have greater resistance for cam out

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16
Q

What size Frearson screwdriver should be used for different screws?

A

Size 1 for #5 and smaller
Size 2 for #6 and larger

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17
Q

How is a pozidriv screw driver an improved version of the Phillips?

A
  • Allows more contact area between bit and screw so less cam outs with a greater torque applied
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18
Q

How can you tell the difference between a posidrive and Phillips screwdriver?

A

Has prefix PZ

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19
Q

What are the benefits of a torx/ star drives?

A
  • apply more torque w reduced cam- out risk
    -: requires less operator effort
  • good when removing screws that have become clogged with debris
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20
Q

What size do torx screwdriver/ bits range from?
What must be noted when choosing a size?

A

T1 to T100
The screw and driver must be the same t#

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21
Q

What can internal hex’s also be known as?

A

Allen key screws

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22
Q

What is a torq set screwdriver?

A

Like a Phillips but the cross is offset
Allows for greater torque transfer

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23
Q

What is the advantage given by mortorq shallow recess?

A

The fastener can be smaller yet retain its strength

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24
Q

When are hi- torques used?

A

When you need to repeatedly remove and install the fastener
Can execute installation without applying high force

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25
Q

What specialty tool can be used if fasteners are very tight?

A

Screw extractor

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26
Q

How are hammers classified?

A

By their Pein, face, weight or shape

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27
Q

What is the head of a hammer made from?

A

Steel

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28
Q

What is the handle of a hammer made from?

A

Usually from wood but can be plastics or composite materials

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29
Q

What is done to the handle of a hammer to reduce fatigue of the operator?

A

Sheathed in shock absorbing polymers

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30
Q

How is the handle secured to the head of a hammer?

A

Handle is secured to the Head through the eye by a wedge and composite hammers are often sealed with a resin too

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31
Q

What are the most common types of hammer used in aviation?

A
  • ball Pein
  • DIN general purpose
  • soft face mallet
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32
Q

What are ball Pein hammers manufactured from? What is its use?

A
  • high grade drop forged steel which is fully heat treated
  • used for shaping metals, with cold chisels and punches
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33
Q

What are DIN hammers used for?

A

Same purpose as a ball Pein hammer

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34
Q

How does a soft face mallet reduce the force transmitted back to the user?

A

Temporarily deforms more than a metal hammer would

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35
Q

What can a soft faced mallets faces be made from?

A

Plastics incl. nylon or natural rubber (which is heavier)

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36
Q

How are soft face mallets graded?

A

By weight of the head and by hardness of the striking face

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37
Q

What is a plier?

A

Tool that has a pair of handles joined by a fulcrum/ pivot

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38
Q

How are pliers classified?

A

By their function and type of nose they have

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39
Q

How should pliers be constructed? (what materials are used)

A
  • made of high quality alloy steel with induction hardened cutting edges
  • Handles sheathed in comfortable soft plastic or rubber
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40
Q

How is a single fixed joint plier made?

A

Halves of the pliers are half cut out and placed inside each other w a pivot point

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41
Q

What is the toggle compound joint plier?

A

Combines single fixed joint w a toggle joint
The extra joint allows you to apply more leverage to the jaws

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42
Q

What is a lap joint?

A

Both halves of the pliers are jointed on top of each other

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43
Q

When is a lap joint used?

A

For heavier pliers and when greater leverage when cutting

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44
Q

When are slip joints used?

A

When you need to move the pivot point to make the jaws move according to the job

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45
Q

What are diagonal pliers used for?

A

Cutting of wire

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46
Q

How do diagonal pliers cut?

A
  • By indenting and wedging the wire apart
  • jaw edges make a v shape
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47
Q

How are diagonal cutters made?

A
  • From tempered steel
  • inductive heating and quenching is used to harden the jaws
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48
Q

Why are diagonal/ flush cutters used instead of symmetrical cutters?

A

Allow wires to be cut flush to the solder joint to avoid a sharp tip

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49
Q

What are combination/ lineman’s pliers used for?

A
  • Base is used to cut wire
  • centre of serrated jaw rotates round objects nuts and bolts
    They are multifunctional
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50
Q

What are long nose pliers used for?

A

Detailed work with wire

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51
Q

What are multi grips/ swan neck pliers?

A
  • several curved grooves that make up a series of interlocking joints
  • have a slip joint that make them adaptable to different situations
  • long handles so a large force can be applied to the jaws
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52
Q

How are the vice grip pliers jaws adjusted?

A

With the knurled screw at the end of the main handle

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53
Q

What are vice grip pliers used for?

A

To hold things incl. pipes, cut wire or hold a bolt

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54
Q

What are circlip pliers used for?

A

For fitting and removing circlips

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55
Q

What length are wire locking pliers available in?

A

Usually 230mm
150mm also popular

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56
Q

How is the size of a vice measured?

A

By jaw width and the capacity of the vice when the jaws are open

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57
Q

What are the two types of metal working vices?

A
  • fixed/ stationary
  • rotating (using a swivel base)
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58
Q

What thread do clamping device screws usually have?

A

ACME thread

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59
Q

What is type 1 of torque wrenches?

A

Indicate torque via a mechanical scale, dial or electronically .

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60
Q

What is type 2 of torque wrenches?

A

Fixed or adjustable to a preset torque value

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61
Q

What are the common types of type 1 torque wrenches?

A
  • wrench with torsion or flexing bar
  • wrench w rigid body and an indicator
  • wrench w rigid body and electronic measurement
  • screwdriver w indicator
  • screwdriver w electronic measurement
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62
Q

What type of force is measured by a torque wrench?

A

Reaction force

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63
Q

How do convert Nm to lbs- ft?

A

Divide Nm by 1.356

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64
Q

How do you convert from lbs- ft to lbs-inch?

A

X12

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65
Q

How should a torque wrench not be cleaned?

A

DO NOT SOAK in a solvent as it may ingress the tool, wash away any lubricant and introduce inaccuracies.

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66
Q

What must be done when using an extension with a torque wrench.

A

Torque has to be reduced to account for the extension thats been added

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67
Q

What is the torque angle tightening method?

A
  • uses initial torque loading like usual
  • for a final torque it’ll give an angle that has to be used instead of a torque value
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68
Q

When would a calibrated ruler need to be used?

A

If it’s being used to measure an item for inspection, modification or so on

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69
Q

What is the difference between a tri square and a combination set?

A

The head slides along the rule and it can be clamped where ever
You can scribe lines at a 45 degree angle

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70
Q

What is a scrubber made of?

A

Tool steel

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71
Q

Since dividers can damage skins, what can be used instead for marking out?

A

Pencil

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72
Q

How are punches classified?

A

By the shape of their head

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73
Q

What are the two types of punches that are generally used?

A

Solid or hollow punches

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74
Q

What are punches usually made of?

A

Hardened steel
A type of punch called “drift” can be made of copper or bronze to minimise damage to the object that’s being drifted out

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75
Q

What is a prick punch used for? What is its tip angle?

A
  • used when marking metal to show where holes should be drilled
  • angle 30 ° or 60 °
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76
Q

What is a centre punch used for? What is its tip angle?

A
  • making indentations in metal to stop wandering when drilling
  • light work 60 °
  • General work 90 °
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77
Q

Why is a hammer not necessary when using an automatic centre punch?

A
  • It has an adjustable spring loaded trip mechanism
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78
Q

What is an automatic centre punch used for and what is its tip angle?

A
  • used to indent where drilling is to be done
  • general work 90 °
  • light work 60 °
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79
Q

How do you drive out a bolt or a pin?

A
  • start with a starting/ taper punch
  • finish with a pin punch
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80
Q

How do you drive out a bolt or a pin?

A
  • start with a staring/ taper punch
  • finish with a pin punch
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81
Q

How is a pin punch selected to take out rivets?

A

Match punch face diameter to the diameter of the rivets shank

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82
Q

When are beryllium- copper and brass punches used?

A
  • where damage may occur if using a hardened steel punch
  • environments where there’s a risk of sparking
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83
Q

What direction do yellow, green and red aviations snips cut?

A

Yellow: Striaght
Green: curve right
Red: curve left

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84
Q

How should cuts be made when using aviation snips? (Since they don’t remove any material and minute fractures can occur along the cut)

A

About 0.8mm from the layout line and must be finished by hand filing down the line

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85
Q

What is the size range of a full size hacksaw?

A

6-16 inches, most common is 12 inches

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86
Q

How many teeth per inch are in coarse hacksaw blades?

A

14 teeth per inch when cutting steel
18 teeth per inch for solid stick ali, bearing metal, tool steel and cast iron

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87
Q

How many teeth are in a medium pitch hacksaw blade?

A

24 teeth per inch
When cutting thick walled tubing, pile, brass, copper, channel and angle iron

88
Q

How many teeth are there per inch of a fine hacksaw blade? If

A

32 teeth per inch
When cutting thin walled tubing and sheet metal

89
Q

What is the cutting direction on a full size hacksaw blade?

A

On the forward stroke

90
Q

Which direction do the teeth in a junior hacksaw face?

A

Towards the handle

91
Q

What is the cutting direction of a junior hacksaw?

A
  • towards the operator
  • this is because the saw frame is springy and compressed the blade if force is applied when the saw is pushed away
92
Q

What direction do the teeth in a mini hacksaw generally face?

A

Face forward
(Used for confined spaces)

93
Q

What speed should you hacksaw at?

A

Not more than 40-50 strokes per minute

94
Q

What are files made from?

A

High grade carbon steels that are tempered to give its strength and durability

95
Q

What special treatment do tangs (type of file) undergo and why?

A

Further heat treatment to make it softer and less brittle

96
Q

How are files classified?

A
  • length from point to base of the tang/ top of the heel
97
Q

What does the “shape of the file” refer to?

A

It’s cross sectional shape

98
Q

How are flat files tapered?

A

Tapered in width and thickness for the last 1/3 of their length towards the tip

99
Q

What is a hand files shape?

A
  • rectangular in cross section
  • tapered in thickness
  • parallel for their full length
  • one safe edge and one single cut
  • both faces will have double cut teeth
100
Q

What cut do square and triangular files have?

A

Double cut teeth on all edges

101
Q

What is the difference between round and rat tail files?

A

Rat tail files are tapered towards the tip

102
Q

What is the cut in both sides of the half round file?

A
  • flat face is double cut
  • half round face is single cut
103
Q

What angle are the teeth cut in a single cut file?

A

65 °- 85 °

104
Q

What angles are teeth of double cut files?

A

First set: 40-50 °
Second set: 70-80 °

105
Q

What allows the cutting stroke of the file to be forward stroke only?

A

Negative rake (sloping backwards of the teeth)

106
Q

What are the grade of cuts commonly used?

A
  • bastard cut
  • second cut
  • smooth cut
  • Rasp cut (removes the most material)
107
Q

What are the three parts of a drill bit?

A

Shank
Body
Point

108
Q

What are the flutes in a drill bit for?

A
  • Permit removal of swarf
  • allows cutting fluid to reach the cutting lips
109
Q

What determines the size of a drill bit?

A

The margin (narrow surface along the flutes)

110
Q

What provides the torsional strength to a drill bit?

A

The land (bit between the flutes)

111
Q

What does the point of the drill consist of?

A

Cutting edge, flank, face, web and chisel edge

112
Q

What drill point angle do aluminium and mild steel bits have?

A

118 degrees

113
Q

What drill point angle do aluminium and mild steel bits have?

A

118 °

114
Q

What’s drill point angle do alumium, high tensile steel, stainless steel, sheet steel use?

A

135 °

115
Q

What drill bits use a drill angle ion 30-70 °?

A

Hard rubber and fibre 60 °
Plastic materials: deeper it is the higher the angle required

116
Q

What standards are used to size drills?

A

ANSI American National Standards Insitute
ISO International Organisation for Standardisation

117
Q

What does a split point twist drill bit have that helps stop wandering?

A

Reduction of web thickness at the point
(Same concept as centre punching being done w smaller diameter)

118
Q

What are the advantages of a split point drill bit?

A
  • faster drilling
  • requires less force to cut through material = less heat and stress
  • create smaller or less chips so reduced risk of holes clogging up and bits breaking
119
Q

How many lips can a standard countersink have?

A

One, three or multiple

120
Q

What are the types of reamers?

A
  • hand reamers
  • machine reamers
121
Q

What is the cylindrical part of a straight reamer for?

A

Merely grooves cut for the full length of the reamer body
For chips to escape and lubricant to reach the cutting edge

122
Q

What does the cutting on a reamer?

A

the end of the reamer

123
Q

What should you never do when taking out the reamer after cutting?

A

Do not reverse the cut/ rotation of the reamer

124
Q

What is used to drive a machine reamer? How is it removed?

A

Driven by a morse taper shank NOT a square drive
A key drift has to be used to remove it

125
Q

How is a straight shank reamer shaped?

A
  • shank is smooth and parallel with no square or morse taper drive
  • can have straight or helical flutes
  • Used in a drill
126
Q

Is the spiral or straight fluted reamer less likely to chatter?

A

Spiral

127
Q

What reamers are tapered?

A

Spiral and straight fluted reamer

128
Q

What reamers are used to complete the reaming of blind holes?

A
  • bottoming tapers
  • have no taper
129
Q

What is a tap used for?

A

Cut threads in the inside of a hole

130
Q

What is a die used for?

A

Cutting external threads Ona round bar

131
Q

What are identical in all taps in a set?

A

Identical in diameter and cross section

132
Q

What is the only difference between all the tapers in a set?

A

The amount of taper

133
Q

What are the three taps in a set used for?

A
  • taper tap
  • plug tap
  • bottoming tap
134
Q

What is the taper tap used for? How much is it tapered?

A
  • only tap needed for tapping holes that extend through thin sections
  • tapered back for six to seven threads
135
Q

What is a plug type tap used for?

A

Helps the taper tap for thicker materials

136
Q

What is a bottoming tap used for?

A
  • to cut full threads (so not tapered) to the bottom of a blind hole
137
Q

What tool is used to hold and turn a tap?

A

A tap wrench tool

138
Q

What are the two types of dies.

A
  • solid dies
  • adjustable dies
139
Q

What cut do solid dies produce?

A
  • a nominal thread w consistent depth
  • accuracy is dependent on die precision and wear
140
Q

How is the die adjusted on an adjustable die?

A

By turning the integrated screws

141
Q

How to adjustable dies remove chips?

A

Have cavities

142
Q

What is the “stock” in an adjustable die?

A

The tool used to hold and turn a threading die when producing external threads by hand

143
Q

What are the three interchangeable basic requirements of electric tools?

A
  • Either have a three wire cord w ground or be grounded or
  • Be double insulated or
  • Be powered by a low voltage isolation transformer
144
Q

Why is double insulation the most convenient way to protect against electrical shock?

A

The user and tools protected in two ways:
1) by the normal insulation on the wires inside
2) by the housing that can’t conduct electricity

145
Q

How is a pillar drill driven?

A
  • by an electric motor through a speed changing mechanism (can be a belt transmission or a gear transmission)
146
Q

Are drills run faster or slower when cutting softer materials?

A

Faster

147
Q

How is an abrasive wheel tested? What is the sign of an undamaged wheel?

A
  • tapped gently w a light non- metallic instrument
  • An undamaged wheel makes a clear metallic tone or “ring”
148
Q

What is the main advantage of pneumatic tools over electric?

A

Safety

149
Q

What pressure is the air supply to pneumatic tools?

A

Generally 90-110 psi

150
Q

How is collected moisture, in air compressors for pneumatic tooling, countered?

A

The compressor will have a water drain

151
Q

What head angles are available in angle drills?

A

30 °
45 °
90 °

152
Q

What is a collet? (Angled drills)

A
  • a sleeve w a cylindrical inner surface and conical outer surface
  • used to connect drill bits to the small drill head size of angled drills
153
Q

What does a drill stop do?

A
  • regulates hole depth, cushions the breakthrough, eliminates surface marks and reduces drill breakage
154
Q

Where can you find the manufacturers recommended capacity for a rivet gun?

A

On the barrel

155
Q

What supplies the force to a pneumatic drill to buck the rivet?

A

An air driven hammer inside the barrel

156
Q

What are the four types of micrometers?

A

Internal
External
Depth
Thread

157
Q

Give a description of a micrometer:

A

Circular frame with a cylindrical extension (barrel) at its right end
Hardened anvils inside at the left end

158
Q

Watch a how to read imperial and metric micrometer video

A

👍

159
Q

How can a micrometer be calibrated?

A

Insert a standard or gauge block between the anvil and spindle
Gently close the spindle on to the block
Match the zero mark on the thimble with the sleeve datum line with a wrench

160
Q

What can an internal micrometer have to make it more accurate?

A

symmetrically positioned anvils

161
Q

How do you do a zero error check on a Veronica calliper type?

A
  • don’t over tighten the jaws
  • tighten the lock screws
162
Q

How do you carry out a zero error check on a digital and dial type Vernia?

A

Close the jaws and tighten the lock screws
Check that zero divisions on all scales align

163
Q

What are three disadvantages of a dial calliper?

A
  • easily damaged
  • more difficult to read
  • on,y come in one unit not both
164
Q

What tool can be used to measure the alignment of shafts or check the smoothness of surfaces?

A

Dial test indicator (DTI)

165
Q

Where the two types of DTIs?

A

Plunger DTI
Lever DTI

166
Q

What ATA chapter covers servicing?

A

Chapter 12

167
Q

What has to be done to hoses from all liquid and gas servicing trolleys when not in use?

A

They’ve got to be blanked

168
Q

What can the lubricants used on aircraft be broken down in to?

A
  • greases
  • oils
  • specialty lubricants
169
Q

What two broad areas are lubricants used in?

A
  • airframe systems
  • engine and gearbox systems
170
Q

Describe the valve of a grease nipple.

A
  • one way valve that isolated the grease in the line and stops it from coming back out
  • spring loaded to prevent the loss of lubricant
171
Q

What are the most commonly used grease nipple fittings?

A

Zerk fittings
Flush type where clearance is a problem

172
Q

What is needed when adding grease via a flush nipple?

A

An injector needle
( the tip of the injector needle deseats the ball valve by applying gentle pressure)

173
Q

What is general servicing oil applied by?

A

Oil cans

174
Q

What are specialty lubricants applied by?

A

Aerosol

175
Q

What are hydraulic and engine oils applied by?

A

Dedicated equipment

176
Q

What should be done to aerosols before use?

A

Shake it until the pea is moving with no resistance

177
Q

On what type of aircraft are mineral based hydraulic oils used?

A

Usually non pressurised and not operating in such harsh extremes
Can be poured straight from the can

178
Q

On what aircraft are phosphate ester based hydraulic fluids used?

A

Used on almost all pressurised aircraft with systems that require minimum 3000 psi
operate in harsh environments

179
Q

What is the application method when using phosphate ester based hydraulic fluids?

A

Can’t be directly poured as the ac system will be pressurised
Pressurised application

180
Q

What is a common hand pump used to top up systems for almost all oils?

A

Risbridger- connects to a standard can

181
Q

How does a permanent magnet moving coil measure current?

A
  • It’s pointer deflects a certain amount according to the current flowing through its coil across a permanent magnet
182
Q

How does the spring, that balances the forces when using a permanent magnet moving coil, compensate an increase in temperature?

A

The springs are made of phosphor bronze metal, which had a positive temperature coefficient
As the temp changes it allows the need,e to remain stationary

183
Q

What are two features used that increase the accuracy and efficiency of the permanent magnet moving coil meter?

A
  • Iron core placed inside the coil to concentrate magnetic fields- produces eddy cuffent that will give some damping and reduce oscillations too
  • Curved pole pieces are attached to the magnet- ensures the turning force increases steadily as the current increases
184
Q

What is full scale current?

A

The amount of current that must flow through the meter coil to cause a full scale deflection

185
Q

What is the relationship between meter sensitivity and the full scale current value?

A

Meter sensitivity value is the reciprocal of the full scale current value

186
Q

Is an ammeter connected in series or parallel w a circuit?

A

In series

187
Q

How do you connect a DC ammeter?

A

+ terminal must be connected with the positive side of the circuit
- terminal connected to the negative side

188
Q

What is a shunt?

A

A type of resistor connected in parallel with a meter
Increase the amount of current the meter can measure

189
Q

What is the current sensitivity (amount of current that can be measured) and resistance of a standard moving coil meter?

A

Current sensitivity of 1 mA
Resistance if 50 ohms

190
Q

How is a multi range ammeter capable of measuring several different maximum current ranges?

A

It has multiple shunts in the meter case that can be switched on or off depending on what you’re reading

191
Q

How does a voltmeter work?

A

The resistor in it limits the current flow to a value, which results in a full scale deflection

192
Q

What is resistance measured in?

A

Ohms

193
Q

How is the amount of resistance required to be connected in series with a voltmeter calculated?

A

Using V= IR

194
Q

How is a voltmeter connected with the load to be measured?

A

In parallel
Plus terminal connected to positive side and vice versa

195
Q

How does a multi range voltmeter work?

A

Has a selector switch that operates multipliers or resistors (voltmeter version of a shunt)

196
Q

How do you select the current voltmeter range?

A
  • select the range that results in a needle deflection in the centre third of the scale
197
Q

What is an ohmmeter?

A
  • moving coil meter that has a small battery providing voltage that creates the current to operate movement
  • measures resistance of a load
198
Q

What is the ohmmeters pointer deflection controlled by?

A

Amount of battery current passing through the moving coil

199
Q

What allows for calibration in an ohmmeter?

A

A variable resistor (rheostat)

200
Q

How should ohmmeters be connected to a circuit?

A

With the circuit DE ENERGISED

201
Q

What happens to an ohmmeters deflection when resistors have a larger value?

A

More resistance —>
current flowing in the moving coil of the ammeter decreased —>
deflection will decrease —>
scale indication would read a higher circuit resistance

202
Q

If the pointer on an ohmmeter scale is at 20ohms, and the range switch is set at R x 100, what is the actual resistance measurement?

A

2 killiohms

203
Q

What is the difference in function between a shunt and series ohmmeter?

A

In a shunt ohmmeter resistance is measured in parallel w the meter movement
In a series ohmmeter resistance is measured in series with the internal resistors and and the meter movement

204
Q

What’s the key difference in the scales of a shunt and series ohmmeter?

A

Series: 0 is on the right and infinity on the left
Shunt: 0 is on the left and infinity on the right

205
Q

How is a shunt ohmmeter made multi range?

A

Resistors of different values are used

206
Q

What are shunt ohmmeters generally used for?

A

Generally limited to measuring resistances up to 400 ohms
Must be switched to off position after use

207
Q

How can you use a moving coil meter to measure AC?

A
  • must use a rectifier to convert AC to DC
  • a full wave rectifier in AC voltmeters is better than half wave as it’s more sensitive
  • most frequently used is the bridge type rectifier
208
Q

What is a multimeter and what can it be used for?

A
  • a moving coil meter connected to different external resistor networks
  • can measure voltage, current or resistance
209
Q

What is one of the most common multimeters used in aircraft maintenance?

A

The AVOmeter

210
Q

How much current can a digital multimeter measure?

A

AC and Dc to 10A
20A overload for 30secs max

211
Q

How much voltage can a digital multimeter measure?

A

AC and DC up to 600V

212
Q

What is the name of one of the most common digital multimeters?

A

Fluke 115

213
Q

How must the leads in a digital multimeter be connected and disconnected?

A
  • Connect the common test lead before connecting the live lead
  • disconnect the live lead before removing the common test lead
214
Q

What must be done before connecting or disconnecting a multimeter?

A

De- energise and discharge of the circuit

215
Q

What precaution must be taken when measuring resistance with a multimeter?

A

To never apply power to the circuit!

216
Q

What is the primary and secondary winding on a current clamp (used to measure current)?

A

Primary winding: subject conductor
Secondary winding: the coil in the clamp

M7 (9 decks)

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