SOUTHEAST TEXAS CONTINUING EDUCATION HIGH TEMPERATURE WATER HEATING SYSTEMS

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1 EXAM No. 151 HIGH TEMPERATURE WATER HEATING SYSTEMS 1. Due to pressure limitations on pipe and fittings, equipment, and accessories, what is the practical temperature limit of circulating water in district and area heating systems? A. 192 degrees F B. 278 degrees F C. 300 degrees F D. 440 degrees F 2. HTW systems must be maintained at a positive pressure to. A. generate higher system costs as higher rated components are required. B. keep water in the liquid state at high temperatures. C. create a uniform flow through the generator at all operating conditions. D. be similar to more familiar low temperature hot water systems. 3. Which of the following is an advantage of a HTW systems compared to steam heat distribution systems? A. closed circuits B. possible fuel savings C. both A and B D. neither A or B 4. The recirculation system reduces transmission and thermal losses to a minimum. A. open B. obtuse C. perpendicular D. closed 5. In a closed recirculation system, both supply and return high temperature water piping can be run A. at various levels B. up and down C. to suit the contours of the ground D. all of the above

2 6. pipe sizes are used with HTW systems than with steam systems. A. More B. Smaller C. Larger D. Less 7. Savings in operating costs are in the closed circulation HTW system. A. possible B. indefinite C. extremely low D. impossible 8. Maintenance of traps and reducing valves is A. reduced with HTW systems B. increased with HTW systems C. eliminated with HTW systems D. None of the above 9. One HTW system in operation for 15 years, without water treatment, was found to be A. unusable after such a long time. B. free of scale and corrosion. C. extremely corroded from oxygen in the condensation. D. unchanged in its operating capabilities. 10. Future expansion should be A. considered in the initial design of any system. B. ruled out in all cases. C. a difficult task to accomplish.

3 11. The properties of low temperature water are to most engineers A. unknown B. unrealistic C. considered stupid D. familiar 12. It is not well known that the properties of water at high temperatures are favorable than those at low temperatures. A. less B. more C. not any more 13. The influence of pressure on the properties of high temperature water within this operating range has effect on its properties. A. random B. no exact C. a positive D. negligible 14. Which are two basic pressurization methods employed for standby service? A. Steam Pressurized B. Inert Gas Pressurization C. Water Pressurization D. Both A and B. 15. The hydraulic pressurization system consists of a A. regulator valve. B. pressurizing pump. C. pressurizing pump with a regulator valve. 16. Water is circulated by either a

4 A. single cycling method. B. dual cycling method. C. Both A and B. D. None of the above 17. Combinations of the single and dual cycling methods results in basic types of water circulation. A. 4 B. 3 C. 5 D Return water temperatures should be between degrees F. to degrees F. minimum. A. 150,175 B. 250, 275 C. 280,300 D. 350, Most HTW generators are the type generating HTW quickly. A. fuel-fired B. oldest C. newest 20. Single-stage centrifugal pumps are used to circulate water through the distribution system. A. low temperature B. high temperature C. distilled D. stagnant

5 EXAM No. 151 HIGH TEMPERATURE WATER HEATING SYSTEMS PLEASE SHADE THE BUBBLE THAT CONTAINS THE CORRECT ANSWER USE NO.2 PENCIL ONLY, ERASE COMPLETELY ANSWER SHEET LEAVE ANY UNUSED ANSWERS BLANK 1 A B C D 21 A B C D 41 A B C D 2 A B C D 22 A B C D 42 A B C D 3 A B C D 23 A B C D 43 A B C D 4 A B C D 24 A B C D 44 A B C D 5 A B C D 25 A B C D 45 A B C D 6 A B C D 26 A B C D 46 A B C D 7 A B C D 27 A B C D 47 A B C D 8 A B C D 28 A B C D 48 A B C D 9 A B C D 29 A B C D 49 A B C D 10 A B C D 30 A B C D 50 A B C D 11 A B C D 31 A B C D 51 A B C D 12 A B C D 32 A B C D 52 A B C D 13 A B C D 33 A B C D 53 A B C D 14 A B C D 34 A B C D 54 A B C D 15 A B C D 35 A B C D 55 A B C D 16 A B C D 36 A B C D 56 A B C D 17 A B C D 37 A B C D 57 A B C D 18 A B C D 38 A B C D 58 A B C D 19 A B C D 39 A B C D 59 A B C D 20 A B C D 40 A B C D 60 A B C D Name: Date : By signing this sheet I hereby certify that I have studied the course materials and the answers given are my own. I received no assistance with the answers on this exam. Signature: Seal or Number: FORM: E7051 REVISED 2005 Copyright 2005

6 EXAM REGISTRATION EXAM No. 151 HIGH TEMPERATURE WATER HEATING SYSTEMS NAME: Company: Address 1: Address 2: City : Telephone: Fax: PE Registration Number: State: Send this Exam Registration along with your completed Answer Sheet. Include check or money order in the amount of $90 for each course. No third-party checks accepted. FORM: E7051 REVISED 2005 Copyright 2005