High Voltage Engineering Interview Question With Answer

Hello Friends. In last post we shared a lot of mcq on high voltage

engg. Now we are going to share interview question on high voltage

engg. In this post, breakdown in gases, liquids and solids is mostly

discussed. Lets start and enjoy interview question of high voltage

engineering.



Q.1 Mention the types of insulating materials which is used in high

voltage engineering?

Ans - Insulating materials are four types.

A. Solids

B. Liquids

C. Gases

D. Vacuun



Q.2 What are the salient properties of usual metals ?

Ans: These are:

A. Specific resistivity in ohm meter.

B. Temperature resistance coefficient.

C. Specific Gravity.

D. Tensile strength when used in overhead line.



Q.3 What are the usual materials for conductors used in high voltage

equipment and transmission lines?

Ans- Conductors are mostly fabricated from metals. Depending on the

equipment the following metals are found in high voltage work, gold,

silver, copper, aluminium, tin, lead, iron, nickel, chromium, and

others.



Q.4 What are the physical and electrical properties of important solid

insulations suitable for high voltage work?

Ans- The three important properties to look in solid insulation are

a. Dielectric strength which denotes kv/cm or kv/mm which the

insulation can withstand and which a designer will use based on

experience.

b. Dielectric constant.

c. Loss angle called delta which denotes the heating losss in the

insulation under the high voltage. The usual form in which this loss

is denoted by tan delta.