HV Exit Exam • Set 6 Question 1 of 30
In standard high-voltage measuring sphere gaps, the precision spheres are manufactured from:
✓
Direct Answer
Option D: Any of the above (non-magnetic, corrosion-resistant conductive metals)
Calibrated sphere gap electrodes are precision-machined from brass, bronze, copper, or aluminium with polished, non-magnetic surfaces to ensure uniform electrostatic field distribution.
All Options
A
Aluminium
B
Brass
C
Bronze or Copper
D
Any of the above (non-magnetic, corrosion-resistant conductive metals)
(Correct Answer)
Detailed Explanation & Context
Calibrated sphere gap electrodes are precision-machined from brass, bronze, copper, or aluminium with polished, non-magnetic surfaces to ensure uniform electrostatic field distribution.
Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • High Voltage Safety Officer & Switchgear Operations (HV).
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