Test and Certification CEM introduction Test and Certification

CEM Certification What does this mean? Jobs: Corporate Energy Manager Energy Management Consultant Energy Auditor Product Energy Sales Product Energy Management Energy Buyer / Broker

CEM Certified All CEMS are not equal General areas of knowledge Specialization Regional Specialization DOE vs ASHRAE vs LEED What does this mean to you.

Applying your knowledge CEM Certification To raise the professional standards of those engaged in energy management. To improve the practice of energy management by encouraging energy managers in a continuing program of professional development. To identify persons with acceptable knowledge of the principles and practices of energy management related disciplines and laws governing and affecting energy managers through completing an examination and fulfilling prescribed standards of performance and conduct. To award special recognition to those energy managers who have demonstrated a high level of competence and ethical fitness for energy management.

Getting your CEM CEM requirements Minimum of 700 points on the exam Minimum of 700 points on the application A higher exam score is needed with a minimum application score. For Example if you engineering experience is borderline energy experience and you score low on the test the experience can be disallowed. Test scores are valid for 3 years

CEM Test CEM test has 17 sections 3 Mandatory sections Codes and Standards Energy Accounting and Economics Energy Audits and Instrumentation

CEM Test 14 Optional Sections Electrical Systems HVAC Systems Industrial Systems Building Envelopes Cogeneration & CHP systems Energy Procurement Building Automation and Control Systems Green Buildings, LEED and Energy Star

CEM Test 14 Optional Sections (cont) Thermal Energy Storage Systems Lighting Systems Boiler and Steam Systems Maintenance & Commissioning Alternative Financing

CEM Test 14 Optional Sections (cont) Only the first 8 will be scored If you mark in a section erase it totally if you decide to do a different section. What sections to do? You need a specialty, whatever it is do that section. Remember there is no penalty for wrong answers Spend a little time on each section to see which is the easiest Your teachers are a great source of knowledge use them Remember the first 8 are the only ones scored so ERASE COMPLETELY.

Techniques All tests have a technique that will help you. SAT, GRE, LSAT, Bar all have specific ways to take them This test is really 4 kinds of questions: Memorization Logic Evaluation Calculation

Techniques Memorization A lot of questions are pure memorization. What date did who do what. What is the level, rate etc accepted for this group. Learn important dates and names (memorize them) Create/index the data Memorize basics so you can look up specifics For example ASHRAE 62 deals with air in a building. I can look up specifics. These important items will be give you in the class.

Techniques Example Question ASHRAE standard 62-2007 defines the minimum standards for: (A) HVAC equipment sizing (B) Acceptable indoor air quality levels (C) Chiller efficiencies (D) Motor efficiencies

Techniques Logic These questions are items that require thought, not memorization but not calculation. These may be an evaluation they may be an application of knowledge. They will not be an exact item from a note or reference.

Techniques Sample Problem Ground source heat pumps may not meet efficiency projections due to: (A) Improperly installed ground loop (B) Poor water treatment (C) Soil contamination (D) Oversizing

Techniques Evaluation These are a combination of the previous 2 techniques: They require some knowledge, may require some logic and will require simple (in your head) math They will almost always be trying to trick you. Feel confident in yourself. Remember no penalty for wrong answers and you only need 88 right to pass.

Techniques Sample Problem What is the $/MMBtu for a 80% efficient gas furnace if gas costs $12.00/MCF? (A) $8.89 (B) $11.23 (C) $22.46 (D) $15.00

Calculation These are the down and dirty plug in the numbers and get the answer problems. Prepare a cheat sheet by section of appropriate equations Write equations down by section, if you repeat the equation its only paper. Be prepared for 2-3 per section Do them last!!!!!!! The count the same as a TRUE FALSE question.

Techniques Sample Problem Determine the solar heat gain through a 1’ x 3’ window at 1:00 pm in August located at latitude 28° N. The window has an east orientation. The SHGF for the specified conditions is 160 BTU/Hr- ft2. The SC is 0.70. (A) 1,120 Btu/hr (B) 228.6 Btu/hr (C) 336 Btu/hr (D) None of the above

Techniques Overall Test Techniques Time will be a factor Each problem you have less than 2 minutes If you spend to much time on a problem you will lose points because you didn’t get to an easier problem. Work the low hanging fruit Have a plan, after the class you will know what areas you understand and what ones you don’t. If you think a problem is going to take to much time, grade it and move on.

Techniques Test Plan Section order You will find sections you thought would be easy to be hard Be prepared with an order of which sections you want to do Be prepared to look at least 13 sections 3 require, 8 optionals you feel comfortable with and 2 secondary sections. Do not panic if a section has lots of calculation problems Follow your plan (88 right not 130) Grade the questions and move on.

Techniques Test Plan Time Management It’s a simple equation 4 hours/130 question = less than 2 minute per question. My plan was no more than a minute on a question on the first pass. Grade all questions no answered. 1 for look up questions 2 for quick calcs 3 for hard calcs 4 for no clue

Techniques Test plan With time management and grading it is a simple as 1,2,3. Work the test don’t let the test work you. Use you back up sections. Do not force you way through the test it will eat you alive. The faster you reach 88 the easier and more confident you will feel.

Questions?

Sample Problems Which of the following is correct: (A) 10 kWh = 34,130 Btus (B) 5 therms = 500,000 Btus (C) 3 tons = 3,600 Btu/hr (D) 10 therms = 10,000,000 Btus

Sample Problems The lighting efficiency term is lumens per watt. (A) True (B) False

Sample Problems A chiller has a full load rating of 0.7 kW/ton. What is the full load kW if this unit has a 200 ton rating? (A) 286 (B) 140 (C) 900 (D) 75

Sample Problems An office building has 50 employees and is occupied for 250 work days a year. It is estimated that each employee uses, on the average, 1 gallon of hot water per day for hand washing. The hot water temperature required is 120°F and the city water is 60°F. Calculate the amount of annual energy required to heat this water: (A) 12.50 MMBTUs (B) 6.25 MMBtus (C) 25 Mbtus (D) 15.4 MMBtus

Sample Problems An induction motor draws 13 amps at 240 volts. The power factor is .9. Determine the kW. (A) 5.54 (B) 5.16 (C) 4.86 (D) 6.32

Sample Problems A hospital uses 400,000 gallons of water per year just for showers. The showers have the old style showerheads that use 4.5 gpm. What is the annual amount of water saved if they replace the showerheads with new ones that comply with the maximum flow rates allowed per the Energy Policy Act of 1992? (A) 200,000 gallons per year (B) 285,765 gallons per year (C) 222,222 gallons per year (D) 177,778 gallons per year

Sample Problems An alternative refrigerant to CFC-114 is HCFC-124? (A) True (B) False

Sample Problems Participation in the Marching Grants Program for Schools and Hospitals, as authorized in the National Energy Conservation Policy Act (NECPA), requires an 80% match of funds from the recipient institutions except in hardship cases. (A) True (B) False

Sample Problems If electricity is selling for $0.06 per kilowatt-hour and is used for electric heating with an efficiency of 100%, what is the equivalent price of natural gas per therm if it can be burned with an efficiency of 80%? (A) $1.30/therm (B) $1.40/therm (C) $1.50/therm (D) $1.60/therm (E) $1.70/therm

Sample Problems An energy saving device will save $25,000 per year for 8 years. How much can a company pay for this device if the interest rate (discount rate) is 15%?

Thank - You & Good Luck