Quiz sheet for parallel transformers

A buchholz relay is used to provide 

A) a trip mechanism and alarm for a transformer

B) an indicator of moisture content in the oil

C) gas sampling 

D) trip functions

ANSWER: A

The drying agent used to absorb moisture from the air that enters a conservator is 

A) silica gel

B) lime

C) potassium hydroxide

D) ammonium persulphate 

ANSWER: A

The main purpose of conservators on oil filled transformers is to 

A) allow for expansion of oil volume

B) allow the oil to be topped up in the transformer

C) provide a reserve of oil if the tank leaks

D) to allow the excape of oil in the event of an explosion

ANSWER: A

Transformer oil expands due to 

A) the oil temperature 

B) gas bubbles due to moisture

C) expansion of the windings under load

D) expansion of the iron core

ANSWER: A

Last modified: Monday, 31 May 2021, 8:36 PM