HV Exit Exam • Set 5 Question 30 of 30
Which of the following ground soil types typically exhibits the maximum (highest) specific electrical resistivity?
✓
Direct Answer
Option B: Dry sand and gravel
Dry sand, gravel, and solid granite rock have very low moisture retention and lack dissolved ions, exhibiting exceptionally high resistivity (> 1,000 to 10,000 Ω·m).
All Options
A
Clay
B
Dry sand and gravel
(Correct Answer)
C
Peat
D
Loamy farm soil
Detailed Explanation & Context
Dry sand, gravel, and solid granite rock have very low moisture retention and lack dissolved ions, exhibiting exceptionally high resistivity (> 1,000 to 10,000 Ω·m).
Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • High Voltage Safety Officer & Switchgear Operations (HV).
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