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Question 1

Identify components that makeup a drawing number

Answer 1

13-E-MAB-001

13-unit designator

E-discipline

MA- system designator

B-type of drawing

001-sequence number

Question 2

Why as-built drawing are preferred over design drawings

Answer 2

As-built are updated within 24 hours rather than up to 60 days for design drawings

Question 3

Drawings for standard numbering and symbols

Answer 3

Mechanical: 13-M-ZZP-001 - 004

Electrical: 13-E-ZZB-001 - 007

Question 4

Purpose of a Piping and Instrument Diagram

Answer 4

• shows functional relationship between components
• Energy connections between components
• piping design requirements
• flow direction

Does not show location or configuration. Not to scale.

Question 5

Single line electrical drawings

Answer 5

Discipline E

Type A

For load centers and MCCs the sequence number is usually related to LC or MCC #

LC 1-E-NGN-L05 on drawing 01-E-NGA-005

MCC 21 on drawing 01-E-NHA-021

Class load centers are just the last #
ie: 1E-PGA-L31 is on 01-E-PGA-001

The legend gives a description of each device

Functional table outlines the function of each relay

Main Power path is bold. Protection/Indication path are thin typed lines

Question 6

Quality Ratings

Answer 6

Q- necessary for nuclear safety

QAG-necessary for full power ops or safety of plant personnel

NQR-not quality related

Question 7

Elementary electrical drawing

Answer 7

Cabling Block Diagram- shows the circuit by location and interconnecting cables. Can have multiple block diagrams called schemes.

Switch chart shows what contacts are made up when a switch is in a certain position. It also states if switch is “maintained” in a certain position.