2704_UEENEEJ104ATest

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Asia Pacific International College *

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Student Book Written Assessment UEENEEJ104A Establish the basic operating conditions of air conditioning systems

WRITTEN ASSESSMENT UEENEEJ104A Establish the basic operating conditions of air conditioning systems Student Name: Date: Student Number 00000 NS S Assessor Signature ______________________ Assessor Guideline The Assessment Benchmark developed for each unit of competency is the evidence criteria used to judge the quality of performance (i.e. the assessment decision-making rules). Assessors must use these benchmarks to make judgement on whether competency has been achieved and to determine if the participant has performed to the standard expected to meet unit requirement and learning outcomes. Assessment Results To achieve “Satisfactory” level for this exam you will need to score a level of 80% or better. Overall you are required to be assessed as ‘Satisfactory’ on completion of Assessments as assigned by your assessor/s for this unit of competency. You need to achieve a satisfactory for all components to progress. S = Satisfactory NS = Not Satisfactory Students who fail to achieve the required result will be deemed ‘not satisfactory” and are entitled to ONE second attempt. Re-assessment Any re-assessment will be conducted as soon as practicable after you have been informed of the requirement to be re- assessed and have been given the opportunity to be re-trained in the unit. Students that are assessed “satisfactory” after re-assessment of areas deemed NS will achieve competency for this assignment. This summative assessment will be conducted in the classroom environment under Test conditions as follows:  Under supervision by your Assessor  Your Assessor will assist with clarification on Test questions without giving any reference to the answers  You are to answer all of the questions.  No mobile phones or electronic devices will be permitted during assessment.  Papers must have the student’s name and date on the front page Resource Developers to provide a guideline timeframe as follows: Type of Test: Closed Book Assessment max Time: 2 hrs I acknowledge the assessment process has been explained and agree to undertake assessment. I declare that the work contained in this assessment is my own. I understand that a person found responsible for academic misconduct will be subject to disciplinary action Student Signature: 2

WRITTEN ASSESSMENT UEENEEJ104A Establish the basic operating conditions of air conditioning systems Test Topic 1 The Air-conditioning Industry 1. Match the following applications with the equipment type / classification Large central chilled water plant   Domestic / small mobile areas Large package A/c units   Domestic Large split ducted systems   Shopping centres Small split systems   Industrial / Factories R A C units   Commercial Topic 2 Working safely with air conditioning systems 2. Place the 5 Steps of risk management in the correct order ( number 1 to 5 ) Review control measures Identify hazards Implement control measures Assess risks Decide on control measures 3. Match the following hazards with their risk control measures Hot / Cold pipework measurement   Isolate before removing guards Rotating machinery (Fans , Drive shafts etc…)   Only by qualified people Confined spaces (ductwork)   Use remote equipment Biological   Avoid contact / wear gloves working at heights   Wear PPE (breathing) 3

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WRITTEN ASSESSMENT UEENEEJ104A Establish the basic operating conditions of air conditioning systems Topic 3 Temperature & relative humidity measuring devices 4. Complete these sentences using the words supplied 1. Ice 2. Care 3. Humidity 4. Boiling 5. Batteries 6. Stems 7. Temperature 8. Wet Bulb Depression 9. Psychrometer a. A digital or sling _______ is used to read _______ resulting in a _______ reading. b. Instruments require care and maintenance such as removing _______ after use and ensuring _______ are protected from bending c. _______ must be taken around moving machinery / equipment d. Melting _______ and _______ water are 2 constant readings able to be used for _______ calibration 5. Circle the correct answer a. The evaporator is effected more by RH% than temperature b. The condenser is not greatly effected by temperature c. The evaporator is effected more by temperature than RH% d. The condenser is unaffected by RH% Topic 4 Air velocity measuring devices 6. Match the types of anemometers to their applications Hot wire (velocity below 0.25 mtr/sec)   Supply / Return / outside air Grills & ductwork Rotating vane   Supply / Return /outside air Grills & ductwork Digital   toilet exhaust/fume cupboards 7. Complete the following sentences with the supplied words 1. velocity 2. patch 3. area 4. sweep 5. batteries 6. hood 7. outlet / grille 8. L/s 9. working at heights 10. calibration 11. m/s a) Velocity of air is measured in _____ whereas air volume flow rate is measured in _____ using a _____ or either the _____ or _____ methods, which require you to calculate the _____ by the _____ at the _____ b) Hazards to be aware of when taking reading include moving machinery and _____ c) Care and maintenance include removing _____ and having specialists complete _____ when required. 4

WRITTEN ASSESSMENT UEENEEJ104A Establish the basic operating conditions of air conditioning systems Topic 5 Psychrometrics 8. Circle the correct legend for this pie chart a. b. 9. Using the psychometric chart provided. a) Plot the points and complete the following chart. DB o C WB o C H Kj/kg DP o C V m 3 /kg RH % Ώ g/kg 1 25 18 2 30 50 b) Match the supplied abbreviations to their meanings WB DRY BULB h WET BULB ŵ ENTHALPY RH DEW POINT DP SPECIFIC VOLUME DB RELATIVE HUMIDITY V WATER CONTENT Oxygen Nitrogen Argon Other Nitrogen Oxygen Argon Other 5

WRITTEN ASSESSMENT UEENEEJ104A Establish the basic operating conditions of air conditioning systems 10. Sensible Heat + Latent Heat = Total Heat (circle the correct answer) TRUE FALSE 11. Sensible Heat Ratio is (circle the correct answer) a. Heating/cooling load Multiplied By The total Heating/cooling load b. Total Heating/cooling load Multiplied By The sensible Heating/cooling load c. Total Heating/cooling load Divided By The latent Heating/cooling load d. Heating/cooling load Divided By The total Heating/cooling load Topic 6 Basic air conditioning process 12. The four (4) main factors that affect the human comfort zone (circle the correct answer) a. temperature, humidity, movement, cleanliness b. Cleanliness, movement, sensible heat, speed c. Moisture, air speed, humidity, temperature d. Volume, temperature, speed, cleanliness 13. The standard human comfort zone is recognised by the industry as (circle the correct answer) a. 20°C / 50%RH b. 25°C / 50%RH c. 20°C / 60%RH d. 25°C / 60%RH 14. Comfort conditions are obtained through these processes (circle 3 correct answers) a. Sensible Cooling b. Cleanliness c. Humidifying d. De-humidifying Topic 7 Ventilation 15. Complete the sentence with the supplied words 1. forced 2. toxic gasses 3. kitchens 4. natural 5. car parks 6. induced 7. stale Ventilation is used for the removal of ____ and ____ air using ____ , ____ or ____ draft in places such as ____ and ____ 6

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WRITTEN ASSESSMENT UEENEEJ104A Establish the basic operating conditions of air conditioning systems Topic 8 Regulations 16. What Australian standard covers Ventilation Codes (circle the correct answer) a. AS 1668 parts 1 & 2 b. AS 1008 parts 6 & 9 c. AS 3000 d. AS MO56 17. Local councils have requirements and regulations regarding noise and fresh air in residential environments. (Circle the 2 correct statements) a. No noise more than 5dBA above background and floor area method for calculating fresh air b. No noise more than 15dBA above background and floor area method for calculating fresh air c. No noise more than 5dBA above background and air change method for calculating fresh air d. No noise more than 15dBA above background and air change method for calculating fresh air Topic 9 Heat loads 18. Match the following Sensible heat sources include A change is system capacity Latent heat sources include Humans, Moisture The effect of sensible / latent ratios is Computers, Lighting, Solar 19. Industry check figures for heat load calculations are based on Dry bulb, Wet bulb, RH %, Air volume, outside air, Occupancy and machinery, as well as floor areas. (circle the correct answer) TRUE FALSE 20. For RAC/Split system unit selection, a rule of thumb is used. (circle the correct answer) a) 100 watts/sq mtr b) 150 watts/sq mtr c) 200 watts/sq mtr d) 250 watts/ sq mtr 7