GN6002_Machines_Electricity

A delta circuit has each element of value R/2. The equivalent elements of star circuit with be ?

• R/6

• R/3

• 2R

• 3R

ln a delta network each element has value R. The value of each element in equivalent star network will be ?

• R/6

• R/4

• R/2

• R/3

In a delta circuit, each element has a value of 2R. What will be the equivalent value of each element in a star circuit?

• R/2

• R

• 2R/3

• 4R/3

If each element in a star network has a value of 3R, what will be the value of each element in the equivalent delta network?

• R

• 2R

• 3R

• 6R

Given a star circuit with each element having a value of R/4, what will be the value of each element in the corresponding delta circuit?

• R/16

• R/8

• R/4

• R/2

A transformer transforms ?

• voltage

• current

• current and voltage

• power

During open circuit test of a transformer ?

• Primary is supplied rated voltage

• Primary is supplied full-load current

• Primary is supplied current at reduced voltage

• Primary is supplied rated kVA

The noise produced by a transformer is termed as ?

• zoom

• Hum

• ringing

• buzz

What happens during a short circuit test of a transformer?

• Primary is supplied rated voltage

• Primary is supplied full-load current

• Primary is supplied current at reduced voltage

• Primary is supplied rated kVA

The type of load for which the voltage regulation of a transformer is negative is ?

• Capacitive

• Inductive

• resistive

• none of the above