Engineer_Candidate_Assignment

1. Engineering
Candidate Evaluation
1. INTRODUCTION
Contained within this document are a set of simplified engineering problems designed to assess your
technical ability and capacity for critical thinking. They are related to everyday project scenarios that
Mammoet engineers commonly tackle.
Datasheets have been provided in the appendices and all assumptions related to each question have
been stated. If you feel that there is not enough information to accurately answer the question you may
make further assumptions provided that these are stated.
Show all workings and make any notes as necessary, cross through any work you wish to be ignored.
2. QUESTIONS
2.1. QUESTION 1
Note: Refer to the attached drawing sheet for accompanying diagram
• In the attached drawing is the plan view of a module
• The module weighs 1000 metric tonnes.
• You have been asked to lift the module up from the ground using one of our patented mega jack
systems.
• The module must be lifted using the four support points shown in the drawing (numbered 1 to 4).
Using the attached data sheets, specify one of the below capacity mega jack systems

2. Engineering
Candidate Evaluation

3. Engineering
Candidate Evaluation
2.2. QUESTION 2
Note: Refer to the attached drawing sheet for accompanying diagram
• In the attached drawing is the elevation view of the same module.
• The module has now had equipment additions and weighs 2000 metric tonnes
• The COG position remains unchanged.
2.2.1. Does this effect the capacity selection from question one? if so, which MJS system is now suitable?
2.2.2. Consider now the self-weight of the cassette towers and the safe working load of the chosen base,
what is the maximum height achievable?

4. Engineering
Candidate Evaluation
2.3. QUESTION 3
Note: Refer to the attached drawing sheet for accompanying diagram
• In the attached drawing there are two side by side windows.
• The left contains a plan view of the ALE250 Barge showing the available deck space in blue.
• The right contains some details related to a heavy lift item that needs to be transported by barge.
2.3.1. Step 1: Based on the available deck space, estimate how many items of heavy lift cargo can be
transported on one barge?
2.3.2. Step 2: Based in the answer to Step 1, how many trips will be required to transport 52 of the same
heavy lift items?
2.3.3. Step 3: Calculate the cost of diesel for the project based on the following?
• The total distance the barge must sale from the point of loading to the destination port is 680km (one
way)
• When being towed by the tug, the barge can achieve 14km/h
• The tug burns 115 litres of Diesel per hour
• Marine Diesel costs $0.70 USD/Litre
• You can assume that the tug does not burn diesel when stationary

5. Engineering
Candidate Evaluation

6. Engineering
Candidate Evaluation
2.4. QUESTION 4
The following two questions will involve estimation of the number of SPMT axles required for given cargo
which must be continuously supported. Only a single line of trailers is to be used.
For these questions, the following characteristics can be assumed:
• Safe working load (SWL): 28 t/axle
• Spacing between axles: 1,400mm
• Aspects such as stability, ground bearing pressure, power packs, and structural strength of the
trailers do not need to be considered.
• You may use 100% of the SWL and do not need to consider the self-weight of the trailers.
2.4.1. Estimate the required number of axles required for an item with the following characteristics:
Length: 28 m
Width: 3 m
Height: 5.7 m
Mass: 400,000 kg

7. Engineering
Candidate Evaluation
2.4.2. Estimate the required number of axles required for an item with the following characteristics:
Length: 18 m
Width: 6.3 m
Height: 3 m
Mass: 448 t

8. Engineering
Candidate Evaluation
APPENDICES
APPENDIX A - DRAWINGS
APPENDIX B - DATA SHEETS

9. Appendices
APPENDIX A - DRAWINGS

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First Issue
00 11APR22 YYyy
9xxxx
YYyy
9xxxx
Karel Doormanweg 47, 3115 JD Schiedam, Harbour 580
P.O. Box 570, 3100 AN Schiedam, THE NETHERLANDS
Tel. +31(0)10-2042424 / Fax. +31(0)10-2042442
www.mammoet.com
DOC:
- D
DRAWING NUMBER
SAP No:
CLIENT:
TITLE:
PROJECT:
SCALE: SIZE:
PROJECT No: SUB:
-
REV.
PART: SHT.
- - -
THIS PUBLICATION REMAINS THE PROPERTY OF THE
PUBLISHER AND SHALL BE TREATED AS CONFIDENTIAL,
UNLESS CONTRACTUALLY SPECIFIED OTHERWISE. NO
PART OF IT MAY BE REPRODUCED, STORED IN A
RETRIEVAL SYSTEM OR TRANSMITTED IN ANY FORM OR
BY ANY MEANS, WITHOUT THE PRIOR WRITTEN
PERMISSION OF THE PUBLISHER.
© 2000 MAMMOET [CQSP-02-01-01]
REV. DESCRIPTION: DATE: DRAWN: CHECKED:
Without authorized signatures this document is uncontrolled, not binding and for indicative purposes only.
NOTED A1
1/1 00
QUESTION 1:
- IN THE ABOVE DRAWING IS THE PLAN VIEW OF A MODULE.
- THE MODULE WEIGHS 1000 METRIC TONNES.
- YOU HAVE BEEN ASKED TO LIFT THE MODULE UP FROM THE GROUND USING ONE OF OUR PATENTED MEGA JACK
SYSTEMS.
- THE MODULE MUST BE LIFTED USING THE FOUR SUPPORT POINTS SHOWN IN THE DRAWING (NUMBERED 1 TO 4).
- USING THE ATTACHED DATA SHEETS, SPECIFY ONE OF THE BELOW CAPACITY MEGA JACK SYSTEMS, AND SHOW YOUR
WORKING?
MJS 300 - SAFE WORKING LOAD = 300 METRIC TONNES
MJS 800 - SAFE WORKING LOAD = 800 METRIC TONNES
YOU MAY ASSUME THAT THE PAD UNDER THE MODULE IS PERFECTLY FLAT.
YOU MAY NEGLEGT THE SELF WEIGHTS OF THE CASSETTES, AND FORCES INFLICTED ON THE MODULE BY THE
ENVIRONMENTAL CONDITIONS.
NOTE:

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16
First Issue
00 11APR22 YYyy
9xxxx
YYyy
9xxxx
Karel Doormanweg 47, 3115 JD Schiedam, Harbour 580
P.O. Box 570, 3100 AN Schiedam, THE NETHERLANDS
Tel. +31(0)10-2042424 / Fax. +31(0)10-2042442
www.mammoet.com
DOC:
- D
DRAWING NUMBER
SAP No:
CLIENT:
TITLE:
PROJECT:
SCALE: SIZE:
PROJECT No: SUB:
-
REV.
PART: SHT.
- - -
THIS PUBLICATION REMAINS THE PROPERTY OF THE
PUBLISHER AND SHALL BE TREATED AS CONFIDENTIAL,
UNLESS CONTRACTUALLY SPECIFIED OTHERWISE. NO
PART OF IT MAY BE REPRODUCED, STORED IN A
RETRIEVAL SYSTEM OR TRANSMITTED IN ANY FORM OR
BY ANY MEANS, WITHOUT THE PRIOR WRITTEN
PERMISSION OF THE PUBLISHER.
© 2000 MAMMOET [CQSP-02-01-01]
REV. DESCRIPTION: DATE: DRAWN: CHECKED:
Without authorized signatures this document is uncontrolled, not binding and for indicative purposes only.
NOTED A1
1/1 00
QUESTION 2:
- IN THE ABOVE DRAWING IS THE ELEVATION VIEW OF THE SAME MODULE.
- THE MODULE HAS NOW HAD EQUIPMENT ADDITIONS AND WEIGHS 2000 METRIC TONNES. THE COG POSITION REMAINS UNCHANGED.
- DOES THIS EFFECT THE CAPACITY SELECTION FROM QUESTION ONE? IF SO, WHICH MJS SYSTEM IS NOW SUITABLE?
MJS 300 - SAFE WORKING LOAD = 300 METRIC TONNES
MJS 800 - SAFE WORKING LOAD = 800 METRIC TONNES
- CONSIDER NOW THE SELF WEIGHT OF THE CASSETTE TOWERS AND THE SAFE WORKING LOAD OF THE CHOSEN BASE, WHAT IS THE MAXIMUM HEIGHT ACHIEVEABLE?
HEIGHT: M
NOTE: YOU MAY ASSUME THAT THE PAD UNDER THE MODULE IS PERFECTLY FLAT.
YOU MAY NEGLEGT THE FORCES INFLICTED ON THE MODULE BY THE ENVIRONMENTAL CONDITIONS. YOU MAY
CONSIDER THAT ALL CASSETTES ARE THE WEIGHT AND HEIGHT OF A STANDARD CASSETTE

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First Issue
00 11APR22 YYyy
9xxxx
YYyy
9xxxx
Karel Doormanweg 47, 3115 JD Schiedam, Harbour 580
P.O. Box 570, 3100 AN Schiedam, THE NETHERLANDS
Tel. +31(0)10-2042424 / Fax. +31(0)10-2042442
www.mammoet.com
DOC:
- D
DRAWING NUMBER
SAP No:
CLIENT:
TITLE:
PROJECT:
SCALE: SIZE:
PROJECT No: SUB:
-
REV.
PART: SHT.
- - -
THIS PUBLICATION REMAINS THE PROPERTY OF THE
PUBLISHER AND SHALL BE TREATED AS CONFIDENTIAL,
UNLESS CONTRACTUALLY SPECIFIED OTHERWISE. NO
PART OF IT MAY BE REPRODUCED, STORED IN A
RETRIEVAL SYSTEM OR TRANSMITTED IN ANY FORM OR
BY ANY MEANS, WITHOUT THE PRIOR WRITTEN
PERMISSION OF THE PUBLISHER.
© 2000 MAMMOET [CQSP-02-01-01]
REV. DESCRIPTION: DATE: DRAWN: CHECKED:
Without authorized signatures this document is uncontrolled, not binding and for indicative purposes only.
NOTED A1
1/1 00

13. Appendices
APPENDIX B - DATA SHEETS

15. EQ NUMBER:
DIMENSIONS:
REVISION:
of
Page
WEIGHT BASE:
CAPACITY:
WEIGHT CASSETTE:
WEIGHT STARTER
CASSETTE:
Mega Jack 300 System
ALE Mega Jack 300
1 1
1100
Ø560
1246 1200
685
730
Variable
height
End Cassette
Cassette
Starter Cassette
Feed-in system
Jacking Base
Interface with
top structure
Forklift
bracket
Sliding Support
2000
1800
Cassette
350
1000
650
Location for
bracing eye
(350)
(560)
min.
starting
height
(1310)
192553-000
0
300t
(See views)
6065 kg
281 kg
1199 kg

16. For reference, only
Issue:1
EQUIPMENT DATA SHEET – SCHEUERLE SPMT
The development of self-propelled modular transporters (SPMT’s) is a major advance in the technology of
moving very large loads. This new generation of heavy transport equipment combines state of the art design with
proven components. The 4 and 6 axle line transporter units can be operated independently or assembled into any
combination.
Individual transporters can be hydraulically and electronically linked to provide a support platform matched to
the characteristics of the load and the route. Programmable, 360-degree electronic steering achieves extremely
accurate load positioning even under arduous site conditions.
The SPMT transport system is an unrivalled method for the safe and effective transport of the largest loads.
Key features of the SPMT system include:
· Hydraulically driven for movement in any direction.
· Multi-axle, high torque drive units, maximising
the tractive effort.
· 25 to 50 percent of all axles driven.
· Multi power modules capable of being interlinked.
· Advance coupling system to reduce rigging time.
· In cab or remote control option.
· Single point control for multi transfer operation.
· 3, 4 or multi suspension.

17. For reference, only
Issue:1
SPMT DETAIL DRAWING
STEERING MODE

18. Appendices
END OF TEST