CEM 試験問題を無料オンラインアクセス

In a warehouse, lights are mounted 4 meters above the floor. This provides an average light level of 150 lux.
To increase the light level without installing more lights or higher Wattage lights, you lower the light fixtures with pendants so that the lights are located 3.25 meters above the floor. Calculate the new average light level on the floor.

• A.176 lux
• B.166 lux
• C.150 lux
• D.276 lux
• E.227 lux

A cooling tower delivers water to a chilled-water plant at 21°C. The outside ambient air conditions are 19°C dry bulb, 50% relative humidity. Using the psychrometric chart, what is the approach temperature of the cooling tower outlet water temperature to the ambient air wet-bulb temperature?
SELECT THE CORRECT ANSWER

• A.10°C
• B.6°C
• C.8°C
• D.4°C

If outside air has a temperature of 25°C dry bulb and 15°C wet bulb, what is the enthalpy of the air?

• A.42 kJ/kg
• B.62 kJ/kg
• C.32 kJ/kg
• D.52 kJ/kg

The International Performance Measurement and Verification Protocol (IPMVP) has how many categories (method options) to determine the performance of an energy- or water-consuming system?

• A.6 Options
• B.4 Options
• C.5 Options
• D.2 Options
• E.3 Options

An air conditioning unit cools make-up air from 25°C (dry bulb temperature) and 50% relative humidity down to 13°C. What type of heat has been removed from the air?

• A.Latent heat
• B.Both sensible and latent heat
• C.No heat energy has been removed
• D.Sensible heat