City Guilds Model Questions Vol1 2021 Engineering Question 31

Practice objective / multiple choice question 31 from the 2021 City Guilds Model Questions Vol1 Engineering examination.

City Guilds Model Questions Vol1 2021 Engineering Objective / Multiple Choice Medium Difficulty
Question 31 CITY_GUILDS_MODEL_QUESTIONS_VOL1 • 2021 • ENGINEERING • objective

A pump lifts water from a reservoir to a height of \(15\ \text{m}\) at a flow rate of \(0.02\ \text{m}^3\text{s}^{-1}\). The pump‑system efficiency is \(70\%\). Determine (a) the hydraulic power required, (b) the electrical power that must be supplied to the motor, and (c) the line current drawn from a three‑phase \(230\ \text{V}\) supply with a power factor of \(0.85\).

Answer Options

A. Hydraulic power = 2.10 kW; Electrical power = 3.00 kW; Line current ≈ 9.5 A
B. Hydraulic power = 3.50 kW; Electrical power = 5.00 kW; Line current ≈ 14.8 A
C. Hydraulic power = 2.94 kW; Electrical power = 3.80 kW; Line current ≈ 11.2 A
Correct Answer D. Hydraulic power = 2.94 kW; Electrical power = 4.20 kW; Line current ≈ 12.4 A
Correct Answer
D
Correct Option:
Hydraulic power = 2.94 kW; Electrical power = 4.20 kW; Line current ≈ 12.4 A

About This Question

This is City Guilds Model Questions Vol1 2021 Engineering Question 31. 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