Three-Phase System Quiz

Three-Phase System Quiz

University

10 Qs

quiz-placeholder

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Three-Phase System Quiz

Three-Phase System Quiz

Assessment

Quiz

Education

University

Medium

Created by

Sridevi J

Used 1+ times

FREE Resource

10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In a balanced three-phase system-delta load, if we assume the line voltage is VRY = V∠0⁰ as a reference phasor. Then the source voltage VBR is?

V∠120⁰

V∠240⁰

V∠-240⁰

V∠-120⁰

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In a delta-connected load, the relation between line voltage and the phase voltage is?

line voltage > phase voltage

line voltage = phase voltage

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

If the load impedance is Z∠Ø, the current (IR) is?

(V/Z)∠-Ø

(V/Z)∠Ø

(V/Z)∠90-Ø

(V/Z)∠-90+Ø

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A three-phase balanced delta connected load of (4+j8) Ω is connected across a 400V, 3 – Ø balanced supply. Determine the phase current IY.

44.74∠183.4⁰A

45.74∠183.4⁰A

44.74∠-183.4⁰A

45.74∠-183.4⁰A

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The three impedances Z1 = 20∠30⁰Ω, Z2 = 40∠60⁰Ω, Z3 = 10∠-90⁰Ω are delta-connected to a 400V, 3 – Ø system. Find the line current I3.

(24.646+j20) A

(-24.646+j20) A

(-24.646-j20) A

(24.646-j20) A

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The voltage between __________ and ___________ is called phase voltage.

line and line

line and reference

neutral point and reference

line and neutral point

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In delta-connected system, the currents IR, IY, IB are equal in magnitude and they are displaced by _____ from one another.

0⁰

60⁰

90⁰

120⁰

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