QUIZ THREE PHASE

QUIZ THREE PHASE

By ssmi

Multiple Choice

Below are advantages of 3 phase system EXCEPT

• more efficient

• easy to extract single phase power

• more complexity of network

Multiple Choice

what is balance source? 

what is balance load?

• equal magnitude and same angle phase

• equal magnitude and 120° phase shift between each source.

• equal magnitude with $$240\degree$$  apart

Multiple Choice

phase sequences are.....

• acb,

  abc

• abc,

  cab

• acb,

  acb

Multiple Choice

what is balance load?

• same value impedance at source

• each phase has same value of impedance

• equal magnitude and 120° phase shift between each source.

Fill in the Blanks

 

list two types of 3 phase connection

Fill in the Blanks

what sequence is it?

Multiple Choice

what type of connection source and load?

• $$Y\ -\ \Delta$$  

• $$\Delta\ -\ Y$$  

• $$Y\ -\ Y$$  

• $$\Delta\ -\ \Delta$$  

Multiple Choice

If $$V_{bn}=120\angle60\degree\ V$$  , determine $$V_{an}$$  , consider as it is negative sequence

• $$120\angle300\degree\ V$$

• $$120\angle120\degree\ V$$

• $$120\angle180\degree\ V$$

Fill in the Blanks

if $Z_{\Delta}=10-j6\Omega,\ I_{AB}=2\angle-10\degree\ A\$  , determine $V_{ab}$  

Multiple Choice

Y - Y connection, positive sequence, Z = 10 + j40 $$\Omega$$  , $$I_a=1.5A$$  , determine $$V_{cn}$$  ?

• $$15\ +\ j60\ V$$  

• $$61.8\angle76\degree$$  

• $$61.8\angle-240\degree\ V$$  

• $$61.8\angle-164\degree\ V$$  

​WELL DONE !!!!