Technical Test Water and Habitat Engineer
Recruitment of WatHab Engineer
Skills and Knowledge Test
We are happy to welcome you for the test for the position of Water & Habitat Engineer in Sa’ada.
All answers should be written in English.
Use only these pages for your answers and calculations. You may use a
simple table calculator, but
no further external support (documents, colleagues, internet...) is
permitted.
The score is as follows:
|
PART A - Various questions |
20 questions, each 2 points, multiple choice 1 point |
|
PART B - Drawings |
2 questions, 10 and 15 points |
You have 90 minutes to
complete all the tasks.
|
For the examiner |
Part A |
/ 34 |
|
|
Part B |
/ 25 |
|
|
Total |
/ 59 |
PART A – Various questions
PROJECT MANAGEMENT
1. List four prequalification criteria you would apply in the evaluation of contractors.
2. List all five of the documents that are available to the contractor and on which he must make a decision to bid or not? The collection of these documents is called?
3. You have three contractors bidding on some of your project work. You have worked with one of the sellers (X) before and know they do excellent work. The project manager from company X calls to ask for clarification on the request for proposal you sent out last week so they can better address your needs. What do you do?
4. You provide a project cost estimate for the project to the project sponsor. He is unhappy with the estimate, because he thinks the price should be lower. He asks you to cut 15 percent of the project estimate. What should you do?
5. The client representative responsible for overseeing your project asks you to provide a written cost estimate that is 30 percent higher than your estimate of the project’s cost. He explains that the budgeting process requires managers to estimate pessimistically to ensure enough money is allocated for projects. What is the BEST way to handle this?
a. Add 30 percent as a lump
sum contingency fund to handle project risks
b. Add the 30 percent to
your cost estimate by spreading it evenly across all project
activities
c. Create one cost baseline
for budget allocation and a second one for the actual project management
plan
d. Ask for information on risks that would cause estimate to be too low
6. Negotiations between two parties are becoming complex, so Party A makes some notes that both parties sign. However, when the work is being done, Party B claims that they are not required to provide an item they both agreed to during negotiations, because it was not included in the subsequent contract. In this case, party B is:
a. Incorrect, because both
parties must comply with what they agreed upon.
b. Correct, because there
was an offer.
c. Generally correct,
because both parties are only required to perform what is in the
contract.
d. Generally incorrect, because all agreements must be upheld.
7. When do stakeholders have the MOST influence on a project?
a. At the beginning of the
project
b. In the middle of the
project
c. At the end of the
project
d. Throughout the
project
WATER AND SANITATION
8. The recommended pumping rate for a borehole is 2 litres/s. How long would it take to fill a water tank with a volume of 100 m3?
9. List all the steps you know in a water supply system, in the right order, from abstraction to distribution:
10. What is the value of volumetric flow (Q) in a pipe with an Internal Diameter of 250 mm and a velocity of 1.5 m/s
11. In disease transmission the term "vector" refers to:
a. an animal, often an insect which carries a pathogenic agent from one host to another or to the human body.
b. a pathogenic agent (e.g. a bacteria) which causes disease in the human body
c. a water-based disease
which is transmitted to the human body by insects.
d. I don't know.
12. Cholera:
a.
Can be easily treated with intravenous fluids and common antibiotics.
c.
Is fatal to all patients who do not receive appropriate medical care.
d.
vibrions (the pathogenic agent causing cholera) survive in water or mud
for a few days only.
e. I don't know
13. "Safe water" is water which does not have any:
a. unpleasant taste.
b. turbidity.
c. pathogenic bacteria.
d. I don't know.
ELECTROMECHANICAL
14. By means of which device is ensured the overcurrent protection in an electrical installation?
15. Which are the three main categories of electrical machines?
16. How does the resistance R of an electrical cable vary with the cable lenght L, with its cross section A and with the resistivity ρ of the conducting material? Write the formula:
17. What is the difference between kW and kVA? How do you calculate one from the other?
CIVIL ENGINEERING
18. How can shrinkage in the concrete be reduced?
19. What means DPC and what is its purpose?
20. Given a (1:2:4) Reinforced Concrete floor slab of 4 x 5 meters (20 m2) 100 mm thickness (reinforced with 10 mm, 20 x 20 cm), disclose the quantity of each material, as requested below.
For the work force (unskilled and skilled) make an estimation based on
your experience.
|
Cement |
|
bags (1 bag=50 kg, specific weight: 1400 kg/m3) |
|
Sand |
|
m3 |
|
Gravel |
|
m3 |
|
Iron bars |
|
pieces (10 mm, 12 m) |
|
Water |
|
litres |
|
Unskilled workers |
|
days |
|
Skilled workers |
|
days |
PART B - Drawings
1. Sketch the profile and a plan of an imaginary water supply system with estimated dimensions for each component (with borehole, main and secondary pipelines, tank, manholes, etc…)
2.
Sketch the section and a detailed plan of a standard disabled toilet to
be constructed in the yard of public Hospital. Choose the respective
material and show clearly the foundation, the walls, the slabs, the roof
and any items needed for a fully functional Toilet. Put doors and windows
when necessary.
Good Luck.
