En0158.a With Light Bulbs

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UTILITIES I EXAMINATION Module/SubCourse: EN0158 Edition: A Situation: For questions 1 and 2 use the diagram below:

Figure 1. 1. What is the total resistance of this circuit? (Refer to Figure 1) 24 Ohms 48 Ohms 12 Ohms 20 Ohms 2. What is the current flowing though the circuit? (Refer to Figure 1) 1.0 Amps 0 Amps 2.0 Amps 0.5 Amps Situation: You are an engineer utilities officer on the staff of the

communications zone engineer. You have been assigned the job of preparing the specifications for the water distribution system for the installations shown in the figure below. The following information applies to these installations: 1. The hospital is to be a 1000-bed unit with flush toilets. 2. The staging area will accommodate 8,000 men and will have flush toilets and bathing facilities. The water pressure at the staging area must be a minimum of 25 PSI. 3. Facilities at the wharf will be capable of supplying ships with a total of 75,000 gallons of water every 10 hours. 4. The jungle training area is to accommodate one division of 18,000 men and 2,500 vehicles. Water will be provided for cooking and drinking purposes and for vehicle operations only. 5. A satisfactory water source has been developed 2.5 miles inland. The water will be treated at this source. The minimum pressure required at all delivery points except the staging area will be 12 PSI. The main line from the source to the cross will be 8-inch pipe. 6. Elevations above sea level for the various installations are as indicated in the figure below. This situation pertains to questions 3 through 7. Figure 2. 3. You will have to provide water to the staging area at the rate of (Refer to Figure 2) 284 GPM 834 GPM NO 174 GPM 139 GPM 4. How much water must you supply to the jungle-training center? (Refer to Figure 2) 30 GPM 77 GPM 63 GPM 45 GPM 5. You will be required to supply water to the wharf site at a rate of ? (Refer to Figure 2)

125 GPM 750 GPM NO 363 GPM 233 GPM 6. Assume that the available head of water at the cross is 36.2 feet and that the staging area will require 150 GPM. What size pipe should you use for branch #1? (Refer to Figure 2) 6 inch 8 inch 2 inch 4 inch 7. Assume that the available head of water at the cross is 28.4 feet, and that the hospital area will require 85 GPM. What size pipe should you sue for branch #3? (Refer to Figure 2) 1 inch 2 inch 1 ¼ inch 4 inch 8. The three types of pressure include all except: Atmospheric Gage Absolute NO Cylinder YES!!!! 9. R-22 refrigerant is stored in what color cylinder? Light green with orange band Orange with yellow band Orange Light Green 10. What is the area in square feet that should be provided for a sludge drying bed without drains for a sewage contributing population of 2,500? 10,000 sqft <-PROBABLY? 7,500 sqft 15,000 sqft 11,500 sqft NO

11. _____________ products in sewage make treatment difficult, and ___________ vapors create an explosion hazard in manholes and pipes. Petroleum Biological Caustic Organic 12. What is the BOD required for 5,000 people in a theater of operation installation? 270 lbs/day 200 lbs/day 1,000 lbs/day 1350 lbs/day NO 13. How many BTUs must be removed from 50lbs of water at 75 degrees Fahrenheit to form solid ice at 32 degrees Fahrenheit? 7200 BTU 9350 BTU 2150 BTU NO 8750 BTU 14. Which utilities team is divided into two shifts to provide continuous operations? GJ HE HJ GE NO 15. Waterborne sewage is _______ percent or more water. 90.4 77.9 58.6 99.8 16. The ___________ or running trap may be used for multiple installations such as sinks or urinals. Drum Trap P-Trap U-Trap S-Trap

17. __________ is the term used to indicate negative gage pressure. Head Loss Suction Head Suction Lift Static Head 18. What wire size is required for a 240V single phase load 400ft away from the power source which draws 90A at full load? 2/0 AWG 2 AWG 4/0 AWG 6 AWG 19. Which of the below is not considered a basic type of water supply and distribution systems? Collection Direct Pumping Gravity Combination 20. Early rehabilitation of facilities for immediate military need are most efficiently accomplished by_____________. Military contractors Military engineers Local civilians All of the above NO 21. ___________ is essentially a controlled rotting or putrification which changes settled solids from a complex organic material to a stable and inoffensive earthlike material. Settling Cestpooling Sludge drying Digestion 22. A waste pipe carries the discharge from any fixture, except __________, to the soil or waste stacks or directly to the house drain. Water closets Lavatories Showers

Sinks 23. Which of the following is not a common temperature scale? Fahrenheit Absolute Celsius Centigrade 24. A transformer operational fault is indicated by which of the following: Abnormal heat Smoke Abnormal noise All of the above

Figure 25-1.

25. Refer to the diagram above. What is the voltage measured across light bulb #2? 4.8 Volts 6 Volts 10 Volts 12 Volts 26. An 8-inch horizontal drainage pipe with a ? inch fall per foot can support what number of fixture units? 2240 1600 NO 940 1920 27. A ________ is frequently inserted in a main line at points where branches may be required in the future expansion of the area. Tee Cross Y-Branch Tee, reducing 28. A plumbing system, in its simplest form, consists of one _________ pipe leading to a fixture and one _________ pipe taking the wastewater away from the fixture. Supply, drain Supply, branch Main, branch Main, drain 29. Secondary treatment of effluent is not accomplished by which of the following methods? Digestion Irrigation Use of Oxygen Ponds Sand Filtering

30. Transmission and distribution lines normally receive ____________ damage in comparison with power stations. Major Considerable Catastrophic Little 31. That body, gas, or liquid which reduces heat is a _____________. Condenser Evaporator Refrigerant Insulator 32. Cementing of joints is common practice in ___________ drainage and waste systems. Surface Exposed Underground Storm 33. Three phase motors will ____________ when two of the three phase inputs are reversed. Overheat Rotate in the same direction Rotate in the opposite direction Explode 34. Some of the more important basic principals for wartime rehabilitation include all of the following except: Cannibalization Expedient Repair Damage Inventory Substitution 35. What is the approximate capacity of galvanized iron pipe 1-inch in diameter over a 100ft length with a 30 PSI pressure source? 35 GPM 16 GPM 34 GPM

30 GPM 36. Which team provides for maintenance of utilities at installations with personnel numbering 8000 individuals? HF HG GI GG 37. Which formula properly depicts Ohm?s Law? E = IR I = E/R R = E/I All of the above 38. _____________ are relatively unimportant as compared to other utilities, and may not be damaged. Sewer Mains Water Storage Tanks Oil Platforms Incinerators 39. Hot water piping is laid out like cold water piping except that _________ are undesirable and paralleling cold waterlines should be avoided if possible. Dead ends Fixtures Returns Loops 40. ____________ is the most important item of sewer maintenance. Manhole cover replacement Repairing breaks Sealing leaks Clearing stoppages 41. The mission of engineer cellular teams include: To provide command and administrative personnel for some brigade engineer units To provide engineer technical, combat, service, and combat support where units of less than company size are required

To decrease the capability of fixed strength units where increments of more than company size are required NO All of the above NO 42. __________ heat is heat added to a substance causing a rise in temperature but no change in state. Fusion Latent Vaporization Sensible 43. Damage to _____________ from sabotage or bombing is relatively unimportant. Pumping Stations Sewers Cesspools/Septic Tanks Treatment Units 44. Which of the following current sources is used to power heavy motors and equipment? Direct Current Three Phase Current Single Phase Current Alternating Current 45. Engineer installation support in the combat zone is provided for the COSCOM by teams from what TOE series? 29-600 5-500 29-500 5-520 46. The highest priority of power allocation is: Civilian requirements Industries beneficial to the military effort Essential military needs, such as hospitals, ports, and shops Essential public needs, such as water pumping, hospitals, sewage pumping stations 47. Which of the following is NOT a disinfecting agent for water treatment? Chlorine

Nitrogen Iodine Oxygen 48. In designing a swage disposal system you estimate that your will require discharge of 3,000 GPM at a minimum allowable velocity of 4 ft/sec with a ground slope of 0.45%. What pipe size will be required? 10 inch 15 inch 12 inch 18 inch 49. Utility engineer service teams can be one of the following classes except: Area Surveying Fire Fighting Engineer Combat Support Dredging 50. The ______________ is where the pressure of the refrigerant liquid is reduced so that it can begin its process of absorbing heat. Condenser Expansion Valve Compressor Evaporator