Test Q&A

1. What does a 1 ton refrigerant represent: a. The weight of the air conditioner b. The amount heat required to cool 1 ton of air in 1 hour c. The amount of heat required to melt 1 ton of ice at 0 degree in 24 hours d. The weight of the refrigerant used. 2. Water boiling in an open pan a. Pressure constant b. Temperature constant c. Volume constant d. A&B e. All the above 3. What is the function of cooling towers in a refrigeration system: a. Cool the exhaust air to reduce environmental impact b. Cool the evaporator in the rooms to maintain required temperature c. Cool the condenser in a central A/C unit d. Cool the compressor to a normal operating temperature 4. R134a refrigerant is environmental friendly and is commonly used, what is the molecular formula a. CH2FCF3 (correct answer) 5. If you leave an ON refrigerator with the doors open in a closed room for 2 days, what will happen: a. The temperature of the room will degrease b. The temperature of the room will increase c. Two other choices 6. Zero velocity of a flow inside a pipe will be: a- At the center b- At the wall c- At the d- None of the above 7. If we lay two pipes in a parallel system which statement is true a. The dimension of the pipes is the same b. The flow is the two pipes is the same c. The head loses per unit length of the two pipes is the same d. The head loss across the entire pipes is the same. 8. Bernoulli’s equation applies under certain conditions - Incompressible flow - Viscous flow - Steady flow - Conservation of energy a. a, b, c, d b. a, b & c c. c, d d. a, c & d

9. The pressure forces on a curved submersed object will be: a. Tangential to the object’s body b. Parallel c. Normal d. None of the above

10. Why is an expansion tank used in a water chiller a. Because it is a closed loop system b. To compensate for the water temperature changes in the system c. A & B d. None of the above 11. If your boss allocate a new assignment of which part of it you are not sure about a. Tell your boss to retrieve it from you b. Take the assignment and do your best to complete c. As for professional help on the part which you do not know about d. Do the part that you know and learn about the part you do not know and do it. 12. Which statement is true? a. Project management is used only for primary projects. b. Project management is replacing the middle management in controlling projects c. Project management is… (a true statement!!!!) d. B & C 13. What will a change over changes? a. The duration of a project b. The Scope c. The cost of project d. The design of a project e. A & B 14. Which is the authority/organization/person responsible to ensure that the standards, codes, procedures are being applied. a. Committee of professional engineers b. National Fire Prevention Association c. Qatar Civil Defense d. Can’t recall 15. What is the inspection frequency of the Fire Alarm Boxes a. Yearly b. Semi-annually c. Monthly d. Weekly 16. What is the unit of Strain a. Dimensionless b. N c. M d. Mm 17. What does the ratio of stress over strain a. Bulk Modulus b. Poisson's ratio c. Viscosity Ratio d. Can’t recall

18. What is the Car Dashboard made of a. Metal Alloy b. Polymers c. Hard Material d. None of the above 19. General conditions and Home office overhead are costs? a. Direct b. In direct c. Both d. Contingency Costs 20. Thermoplastic material a. If shaped under heating and applying pressure the chemical properties will change and it will permanently change into hard material b. If heat and pressure will apply the chemical properties of material will not change 21. Which of these is not a rule of interaction a. Law b. Etiquette c. Morals d. Ethics e. Communication 22. Which membrane can be fixed vertically or horizontally between fire rated walls which control the spread of the smoke a. Smoke and Fire dampers b. Fire Damper c. Air Flow device d. Smoke (… something) 23. Corrosion is a result of: a. Chemical reaction b. Electro-chemical reaction c. Both d. None of the above 24. A system of turbine-generator with efficiency of turbine is 90% and efficiency of generator is 80%. The overall system efficiency is a. 10% b. 100% c. 72% d. 170% 25. Can’t remember….