FMC2601
ASSESSMENT 03
UNIVERSITY OF SOUTH AFRICA
SCHOOL OF ENGINEERING
CONTINUOUS ASSESSMENT
Assessment 03
Semester Course
FMC2601
FLUID MECHANICS II
Lecturer: Ms NJ RAMANAMANE
Int. Moderator: Mr LN SEMAKANE
Marks: 35
Weight of Assessment: 15%
INSTRUCTIONS TO ALL STUDENTS:
Plagiarism is the act of taking words, ideas and thoughts of others and presenting them as your
own. It is a form of theft which involves several other dishonest academic practices. Plagiarism is
subject to disciplinary action which may lead to suspension from your studies.
You will find your assignment on the Moodle Platform.
1.
ALL CALCULATIONS MUST BE ROUNDED OFF TO 3 DECIMAL PLACES;
2.
ALL STEPS IN THE CALCULATION PROCESS MUST BE SHOWN;
3.
ANSWER ALL QUESTIONS;
4.
LIMIT YOUR ANSWER IN ACCORDANCE WITH THE MARKS ALLOCATED FOR THE
QUESTION.
Note: For data, not given make a realistic assumption, motivate your assumption, and then
answer the question.
FMC2601
ASSESSMENT 03
QUESTION 1 [15 MARKS]
Figure Q1 shows a portion of a piping system with a hose of 80 mm diameter. If the
average velocity of the water at point C is 8.50 m/s, determine the required power
output of the pump. Neglect friction losses.
Figure Q1: Schematic of pump used to draw water from a dam
FMC2601
ASSESSMENT 03
QUESTION 2 [15 MARKS]
Figure Q1 shows a pipe with water flowing through at a velocity (V). The manometer
containing mercury is held in the position as shown in Figure Q2. Take the density of
mercury as ρHg = 13600 kg⁄m3 . Determine the following:
a) Differential pressure between point A and point B,
(12)
b) And velocity at point A.
(3)
Figure Q2: Manometer containing mercury connected to a pipe
FMC2601
ASSESSMENT 03
QUESTION 3 [5 MARKS]
A horizontal venturimeter with inlet diameter 20 cm and throat diameter 10 cm is used
to measure the flow of oil at 0.8 specific gravity. The discharge of oil through
venturimeter is 60 litres/s, calculate the reading of the oil-mercury differential
manometer. Take 𝐶𝑑 = 0.98.
©
UNISA
2023