City Guilds Model Questions Vol1 2021 Engineering Question 49

Practice objective / multiple choice question 49 from the 2021 City Guilds Model Questions Vol1 Engineering examination.

City Guilds Model Questions Vol1 2021 Engineering Objective / Multiple Choice Medium Difficulty
Question 49 CITY_GUILDS_MODEL_QUESTIONS_VOL1 • 2021 • ENGINEERING • objective

A balanced three‑phase Y‑connected load is supplied from a 400 V (line‑to‑line) source. The line current is 30 A and each phase has a resistance of 5 Ω. Determine (a) the per‑phase inductive reactance \(X_{L}\), (b) the total apparent power \(S\) of the load, and (c) the overall power factor (state whether it is lagging or leading).

Answer Options

Correct Answer A. X_L ≈ 5.86 Ω, S ≈ 20.8 kVA, power factor ≈ 0.65 lagging
B. X_L ≈ 4.33 Ω, S ≈ 25.0 kVA, power factor ≈ 0.55 lagging
C. X_L ≈ 5.86 Ω, S ≈ 22.5 kVA, power factor ≈ 0.60 lagging
D. X_L ≈ 6.50 Ω, S ≈ 18.2 kVA, power factor ≈ 0.70 leading
Correct Answer
A
Correct Option:
X_L ≈ 5.86 Ω, S ≈ 20.8 kVA, power factor ≈ 0.65 lagging

About This Question

This is City Guilds Model Questions Vol1 2021 Engineering Question 49. It is one of the objective questions from the 2021 City Guilds Model Questions Vol1 Engineering examination.

Difficulty level: Medium .

View More City Guilds Model Questions Vol1 2021 Engineering Questions More City Guilds Model Questions Vol1 Practice Questions Back to Questions

Master the Exam!

You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.

Unlock Full Access Available for Android & Windows
Chat with Support