%
Mark:
ASSIGNMENT 1_T1 mark
AVAILABLE
DATE:
17 MAY 2021
08:00
SUBMISSION 18 MAY 2021 @10:00
DATE:
SUBJECT:
Fluid Mechanics 1
CODE:
DURATION:
26 Hours
MAXIMUM MARKS:
Question:
1
2
MFM21A
3
35
4
Total
Allocated marks:
/8
/18
/9
/35
INSTRUCTIONS:
• Answer all questions using Black/Blue pen.
•
Show all sketches/calculations with the necessary steps. Round off to 3 decimal places
•
Students must submit their own work. Plagiarism is considered as serious misconduct and
will be reported as guided by CUT rules.
•
Submit in PDF format document on eThuto.
INSTRUCTIONAL PROGRAMME:
DP_MEC: MECHANICAL ENGINEERING
CODE:
DP_MEC
L MASHEANE
STUDENT TO WRITE/COMPLETE THIS BLOCK ON THEIR ANSWER BOOK:
DECLARATION OF OWN WORK:
I,(name & surname) ________________________________________________________,
student
number______________________________________, hereby declare that the content of this assignment
is my own work, as defined and constituted in the Rules and Regulations of the Central University of
Technology, Free State (Please consult the Programme Guide of the Department).
Signed:
________________________________
Date:
________________________________
THIS PAPER CONSISTS OF 3 PAGES INCLUDING THIS COVER PAGE.
Page |2
QUESTION 1
Figure 1 shows a layer of oil (8.95 kN/m3), the thickness of 0.3 mm, between two parallel [8]
flat plates. The upper plate is pulled across the bottom plate with a cable connected to
a winch. The upper plate moves with a velocity of 0.05 m/s. The area of contact between
the upper plate and the oil is 1.5 m2. Determine the kinematic viscosity of the oil if the
torque acting on the winch drum should not exceed 24.5 x 10-3 Nm. Take the drum
diameter as 50 mm.
Figure 1
QUESTION 2
Figure 2 shows a 2 m width gate ABC. To maintain this location, what would be the F. [18]
Figure 2
Page |3
QUESTION 3
Find h when the pressure in tank B is 21 kPa.
SGoil = 0.91
Figure 3
[9]