Annex B08 Grounding Fundamentals

Question 0

Facility Ground Systems

Answer 0

Earth Ground System (EGS)
Lighting Ground (LG)
Fault Protective Subsystem/Protective Ground
Signal Reference Subsystem/Signal Ground

Question 1

Two (2) reasons for grounding

Answer 1

Safety

Proper Equip performance

Question 2

Ground Resistance (Amps) acceptable for military electronics

Answer 2

10 ohms or less

Question 3

Temporary Grounding Electrodes used by USMC (2)

Answer 3

Grounding Rods

Grids

Question 4

Two (2) types of grid ground systems

Answer 4

Counterpoise

Ground Screen

Question 5

Factors that affect soil conductivity

Answer 5

Temp
Moisture
Conductive mineral content (salt)

Question 6

Primary treatment used by USMC to improve soil conductivity

Answer 6

Salt Water Solution (5 gallons water/5lbs salt) around earth electorde to produce rapid resistance reduction

Question 7

Effect of grounding a vertical, quarter wavelength antenna

Answer 7

Quarter wave antenna erected vertically with its lower end connected electrically to the ground, BEHAVES LIKE A HALF WAVE ANTENNA