E/M PRINT READING

Question 1

WHAT ARE THE ADVANTAGES OF ELECTRICAL PRINTS?

Answer 1

THEY MAKE IT POSSIBLE TO CONDENSE A GREAT AMOUNT OF INFORMATION TO ONE DRAWING.

Question 2

LIST 3 TYPES OF ELECTRICAL DRAWINGS?

Answer 2

ONE LINE, SCHEMATICS, AND WIRING DIAGRAMS

Question 3

WHAT IS A ONE LINE?

Answer 3

A SKETCH WHICH IS ONE LINE W/ APPROPRIATE SYMBOLS INDICATING A PARTICULAR CIRCUIT, AND THE ROUTE OF POWER FLOW WITH NO REGARD FOR AMOUNT OF WIRES OR PHASES

Question 4

WHAT IS A SCHEMATIC?

Answer 4

IT SHOWS THE SCHEME OF OPERATION OF A CIRCUIT IN MUCH GREATER DETAIL THAN THE ONE LINE AND W/ NO ATTEMPT TO ARRANGE THE SYMBOLS IN THERE PHYSICAL LOCATION.

Question 5

EXPLAIN THE 52A?

Answer 5

THE “A” MEANS THE CONTACT WILL REFLECT OR COPY THE POSITION OF THE BREAKER.

Question 6

WHAT IS UNIQUE WITH THE SEAL-IN CONTACT?

Answer 6

IT IS IN PARALLEL WITH THE START BUTTON

Question 7

REMEMBER OHMS LAW.

Answer 7

VOTLAGE (E) = AMPS(I) X RESISTANCE (R)

Question 8

WHAT 2 THINGS DOES AN ELECTRICAL DRAWING SHOW?

Answer 8

RELAYS AND COMPONENTS

Question 9

HOW ARE ELECTRICAL PRINTS SHOWN?

Answer 9

ALWAYS DE-ENERGIZED

Question 10

WHAT IS THE 43 DEVICE?

Answer 10

SELECTOR SWITCH OR TRANSFER DEVICE

Question 11

WHAT IS THE 20 DEVICE?

Answer 11

ELECTRONICALLY OPERATED VALVE

Question 12

DRAW A MOTOR/GENERATOR SYMBOL

Question 13

DRAW A DISCONNECT SW W/ INTERLOCKED GROUND SW SYMBOL

Question 14

DRAW THE ACB SYMBOLS

Question 15

DRAW FIXED AND VARIABLE RESISTOR SYMBOLS

Question 16

DRAW A GROUND SYMBOL

Question 17

DRAW A PUSH BUTTON MAKE/START SYMBOL

Question 18

DRAW A PUSH BUTTON BREAK/STOP SYMBOL

Question 19

DRAW A SIMPLE START/STOP CIRCUIT