Deck 20: Electrical and Electronic Drafting

Question 1

Describe the purpose of a substation plot plan.

Answer 1

. A substation plot plan shows the entire layout of a substation, showing the relationship between the elements of the substation in correct orientation to compass direction.

Question 2

What are the scales most commonly used to draw plot plans?

Answer 2

. The scales used range from

Question 3

Define terminals.

Answer 3

Terminals are a point of electrical connection.

Question 4

Draw or sketch a simple schematic wiring diagram.

Question 5

Explain the basic difference between electrical and electronic drafting.

Question 6

Briefly describe the transmission and distribution of electricity.

Question 7

Describe a pictorial diagram.

Question 8

Draw or sketch a simple block diagram.

Question 9

Describe the border and title block used on electrical drawings.

Question 10

Explain the purpose of a block diagram in an electrical power system design.

Question 11

Define conduit.

Question 12

Define electrical circuit.

Question 13

Explain the purpose of a bus layout drawing.

Question 14

Draw or sketch a simple schematic diagram.

Question 15

Describe the purpose of conduit installation details.

Question 16

What is the purpose of a ground layout?

Question 17

What do grounding details show and at what scale are they drawn?

Question 18

Draw or sketch a simple wiring diagram.

Question 19

Define bearing.

Question 20

Describe the function of a substation.

Question 21

How should switch symbols be drawn in relation to the wall upon which they are located? 59728_ch20_EOC_ptg01.indd 1 22/02/16 10:50 am

Question 22

Describe the function of a resistor.

Question 23

Give the standard letter identification for the following components: resistor, capacitor, transistor, tube, diode, in- ductor, plug, and jack.

Question 24

Describe the purpose of a block diagram.

Question 25

What is the standard lettering height used on electrical floor plans?

Question 26

Name the American National Standards Institute document that governs the use of electrical and electronic drafting symbols.

Question 27

Define semiconductor.

Question 28

Draw or sketch and label a fixed and variable resistor.

Question 29

Define bias.

Question 30

Define inductance.

Question 31

Define active devices.

Question 32

Reduce the value 4,000 ohms to its simplest form.

Question 33

Name two components that are considered semiconductors.

Question 34

Draw or sketch and label a circuit connection and a crossover.

Question 35

What is the function of a capacitor?

Question 36

What method is used to describe special characteristics in an electrical plan layout?

Question 37

Describe the common sequence standard for component identification.

Question 38

What is the advantage of a folded-down schematic?

Question 39

Draw or sketch the following electrical symbols:

Question 40

How should resistors be placed in relationship to the active devices?

Question 41

What scale is the master pattern?

Question 42

Identify three factors that influence the size of conductor traces.

Question 43

Printed circuits are used for what purpose?

Question 44

Why are holes drilled at the pad location?

Question 45

Reduce the value 0.000000000001 farads to its simplest form.

Question 46

What does the dashed line box around an internal IC sche- matic diagram denote?

Question 47

Make a general statement describing printed circuit artwork.

Question 48

What does the abbreviation LSI stand for?

Question 49

Define integrated circuit.

Question 50

Define amplifier.

Question 51

Why is it possible that an IC schematic may be much easier to lay out and draw than a conventional schematic?

Question 52

Describe pads in PCB layout.

Question 53

Reduce the value 1,000,000 henrys to its simplest form. 2

Question 54

Briefly explain the function of a grid system in preparing master pattern artwork.

Question 55

Define gate.

Question 56

Describe the following: single-layer boards, multilayer boards, multilayer sandwich boards.

Question 57

How are electronic pictorials used in industry?

Question 58

Draw or sketch an example of a horizontal capacitor (C1, 5μf ) and a vertical resistor (R1, 1,000 ohms) connected, and use the most popular labeling technique to show the identification and value of each.

Question 59

Why is the PCB prepared at an enlarged scale?

Question 60

What is the main advantage of surface-mounted devices?

Question 61

Give the general note used to identify that all holes are plated through.

Question 62

Describe an SMD and give its advantage over a conventional PCB.

Question 63

List at least five functions of the CAE program in electronics engineering.

Question 64

Briefly describe unsupported holes, and plated-through holes.

Question 65

Give another name for printed circuit board art pieces for terminal areas.

Question 66

Describe a marking drawing.

Question 67

List the components of a complete engineering drawing.

Question 68

Describe a solder mask.

Question 69

Explain the function of a drilling drawing.

Question 70

Describe a ground plane. 59728_ch20_EOC_ptg01.indd 2 22/02/16 10:50 am