Q1. Design simulation has no benefit to manufacturers for verifying, validating or assessing the intended function of a product under development, as well as the manufacturability of the product. (Answer True or False)
☐ True ☒ False
Q2. When a component or part is designed on CAD and calculus is utilised to design dimensions and grade of steel, what two (2) further tests could be done to ensure confirmation of said part or component to the required tasks?
a) ____________________________________________________________________________
____________________________________________________________________________
) ____________________________________________________________________________
____________________________________________________________________________
Q3. A tool manufacturing company has convinced your workplace to test their new tool steel for construction of milling and borer tools. The tool steel has been forged into a slot drill for faster and deeper cuts in a single pass. The tool company has calculated the cutting speeds and feeds, and now want to use a milling machine in the workshop to test said cutter. As the site mechanical engineer, you have been tasked with testing this tool to its limits and possibly beyond and reporting back on usability, wear and
eakages etc. Before beginning the test, what are the answers to the following?
a) Who should you (as the engineer) communicate with on site and what is a fair and reasonable chain of responsibility?
_Stakeholder and all employees who will be helping out and those within the versinity of where the test will be performed________________________________________________________________________________
_________________________________________________________________________________
_________________________________________________________________________________
_________________________________________________________________________________
) What is a list of reasonable WH&S tasks to perform?
_________________________________________________________________________________
_________________________________________________________________________________
_________________________________________________________________________________
_________________________________________________________________________________
c) Who should you communicate with and what must be done to ensure the same or better sustainability implications are documented of the features and functions of the new tool steel cutter and any changes to the use of the milling machine?
Safety officers, the direct supervisor_________________________________________________________________________________
_________________________________________________________________________________
_________________________________________________________________________________
_________________________________________________________________________________
Q4. A conveyor system in a mine is to be tested with a new compound of ru
er belt. The ru
er belt and conveyor speed and tension has been already deemed suitable in theory. However, it is your job to fit, run up, test and report on the new conveyor belt. The conveyor travels from the stock pile to the washery and is fully covered/guarded. Answer the following:
a) Who should you (as the engineer) communicate with on site and what is a fair and reasonable chain of responsibility?
_________________________________________________________________________________
_________________________________________________________________________________
_________________________________________________________________________________
_________________________________________________________________________________
) What is a list of reasonable WH&S tasks to perform?
_________________________________________________________________________________
_________________________________________________________________________________
_________________________________________________________________________________
_________________________________________________________________________________
c) Who should you communicate with and what must be done to ensure the same or better sustainability implications are documented of the features and functions of the new belt and existing conveyor mechanism?
_________________________________________________________________________________
_________________________________________________________________________________
_________________________________________________________________________________
_________________________________________________________________________________
Q5. Fill in the missing blanks from the Table below.
Fraction
Prefix
Symbol
10-3
milli
m
10-6
micro
µ
10-12
pico
p
Multiple
Prefix
Symbol
103
kilo
k
106
mega
M
109
giga
G
Q6. Calculate the problem below. Convert all measurements in figure below to centimetres. Express answer to 5 significant figures. Show all working and express answer in co
ect units.
1m=100cm
Therefore converting 1.75m to cm will = 1.75*100 = 175cm
1mm=0.1cm
Therefore 600mm = 600*0.1 = 60cm
Therefore will be
Q7. Two masses, = 1.5kg and = 2.5kg, rest on a frictionless surface and are connected by a light string. A horizontal force of 10N is applied to m1 as shown in the figure below.
a) What is the magnitude of the acceleration of the combined masses?
) What is the magnitude of the tension (T) in the string?
Q8. A block of metal with a mass of 2kg lies on a horizontal metallic surface. A horizontal force of 5N is required to move the block, and a horizontal force of 4N is required to keep the block moving at a constant velocity. Calculate:
a) The coefficient of STATIC friction
) The coefficient of KINETIC friction
Q9. The velocity of an object increases with uniform acceleration from rest to 12 m/s in 6 seconds. What is the acceleration and the distance covered by the object? Show all working.
Q10. A rocket fired vertically burns its fuel for 25s, which provides a thrust producing a constant upward acceleration of 8m/s2. Determine:
(a) the altitude reached at the instant the rocket runs out of fuel
(b) Tthe maximum altitude reached by the rocket. Neglect air resistance.
Q11. Convert the following:
(a) 36 revolutions to radians
36? × 2π = 226.195Rad
(b) 315 RPM to rads/s
(c) 127 rads/s to RPM
Q12. State the definition of the term RADIAN in your own words?
______________________________________________________________________________
Q13. How many degrees are there in a RADIAN? Select one (1) co
ect response).
☐ 75.3º
☐ 37.5º
☐ 53.7º
☒ 57.3º
Q14. A piece of mild steel round bar is to be faced off in a lathe. What would be the ANGULAR VELOCITY and the TANGENTIAL SPEED of the tool path when the tool starts cutting on the 100mm diameter and when it is half way through the facing operation at the 50 mm diameter position? The work piece is revolving at 360
min. Show all working out.
Q15. A trolley of mass 150 kg is pulled along a horizontal track by an applied force of 450 N. The coefficient of friction between the wheels of the trolley and the track is 0.18. What is the velocity of the trolley 15 m along the track if the trolley starts from rest?
mm
cm
x
m
600
250
75
1
×
aTTFMm
a
T
T
F
M
m