Question

QUESTION 1

1. The term "Slip" indicates the difference between the motor's synchronous speed and the no-load speed

   		True
   		False

1 points   

QUESTION 2

1. Wet Bulb (WB) Temperature: is for the temperature reading form an ordinary mercury bulb thermometer or regular temperature sensor.

   		True
   		False

1 points   

QUESTION 3

1. The refrigerant (R-134a) is the new replacement of the refrigerant (R-22) as it is less harmful to the environment.

   		True
   		False

1 points   

QUESTION 4

1. Draft Gauge and Bourdon Gauge are used in the pressure measurement

   		True
   		False

1 points   

QUESTION 5

1. For a large boiler, you have the choice of the following energy sources. which source will be the best with lowest point of use cost? Option1:Natural gas @ $0.4/m3, Efficiency 84%. Option2: Fuel Oil #2 @ $0.8/liter, Efficiency 86%. Option3: Electricity @ $0.095/kWh, Efficiency 96%

   		Natural Gas
   		Fuel Oil#2
   		Electricity
   		Both a & c

1 points   

QUESTION 6

1. 5,000 L/s of air leaves an air handler at 10 ºC . It is delivered to a room at 18 ºC. How many kW if air conditioning capacity was lost in the ductwork?

   		48 kW
   		20 kW
   		36 kW
   		60 kW

1 points   

QUESTION 7

1. Which has the greatest NPV assuming a 25 year planning horizon and MARR = 12%?

   		Install a $20,000 solar system that will last 25 years, and generate 38,000 kWh/year at $0.10/kWh.
   		Install a $25,000 Ground-Source Heat pump that will last 50 years and save $3,500/year.
   		Both options has equal NPV
   		Not possible to be calculated

1 points   

QUESTION 8

1. A 20 kW electric roof top A/C unit (RTU) is 10 years old, and has a COP of 2.0 . It operates at full load for 3,000 hours a year. The electric cost is $0.10 per kWh. If this to unit to be replaced with a new 20 kW, what is the minimum value of COP for the new unit to reach an annual savings of $1,500?

   		3.5
   		4.0
   		4.5
   		Can not be determined

1 points   

QUESTION 9

1. kWh is a measure of …………… and kW is a measure of ……………..?

   		Energy, Energy
   		Energy, Power
   		Power, Energy
   		Power, Power

1 points   

QUESTION 10

1. A 20 kW motor is presently driving a centrifugal fan at 1,480 rpm. What would the savings in kW and US $ be if the fan pulley was changed so that the new speed was 1,350 rpm? The motor efficiency is 93.5%. Assume motor is operated 3,500 hours annually and the energy cost is $ 0.10/kWh

   		$ 1,605
   		$ 1980.2
   		$ 1,804.4
   		$ 2049.7

1 points   

QUESTION 11

1. For a particular month the energy consumption is 150 000 kWh and the maximum demand is 420 kVA. The applicable utility rates are €0.08c/kWh and €45/kVA. The factory produced 2050 units of product in that month. Calculate the cost intensity.

   		€ 15 /unit
   		€ 15.07 /unit
   		€ 22.3 /unit
   		€ 30.9 /unit

1 points   

QUESTION 12

1. A roof top air conditioner has an EER of 14.4, what is its COP?

   		1.0
   		2.0
   		3.0
   		4.0

1 points   

QUESTION 13

1. Calculate the amount of reactive power that must be supplied by capacitors to correct a power factor of 80% to 95% in a 315 kW motor at 75% load and 94% efficiency

   		66.9 kVAR
   		82.5 kVAR
   		90.4 kVAR
   		105.8 kVAR

1 points   

QUESTION 14

1. A Hockey Arena has a desiccant unit installed to assist in controlling humidity and to make the ice harder. The unit will last 17 years and is projected to save $57,200 per year in HVAC and Refrigeration energy costs. If the system will cost $223,650 to be installed, what is the internal rate of return of the project?

   		10%
   		12%
   		15%
   		25%

1 points   

QUESTION 15

1. Why do utilities charge a power factor charge?

   		The utility has to deliver more current for the same kW billed
   		The utility has to install capacitors to compensate
   		The utility has to install conductors to compensate
   		All of the above

1 points   

QUESTION 16

1. A facility Which instrument is useful for identifying uninsulated steam lines:

   		Tachymeter
   		Psychrometer
   		Infrared Camera
   		Bourdon Gauge

1 points   

QUESTION 17

1. Which instrument is used to monitor O2, CO in flue gas?

   		Combustion analyser
   		Power analyser
   		Pyrometer
   		Fyrite

1 points   

QUESTION 18

1. If a 75-kW fan motor has a VSD installed that slows down the fan by 20% what is the effect on air flow rate and the kW savings?

   		20% CFM reduction, and 36.6 kW savings
   		80% CFM reduction, and 51.2 kW savings
   		20% CFM reduction, and 20 kW savings
   		20% CFM reduction, and 37.4 kW savings

1 points   

QUESTION 19

1. …………. is the light energy radiated per second, and it is measured in ……………. ?

   		Lux , Lu/m2
   		Lux, Lm
   		Luminous Fulx , Lm
   		Luminous flux, Lu/m2

1 points   

QUESTION 20

1. A new lighting system is installed to reduce energy use in a building. What data is NOT needed to verify savings for this project?

   		Measurement of the CO2 level in the building
   		Measurement of light levels
   		Measurement of the power on the lighting circuit
   		Measurement of the lighting system operating hours

Answer 1

1). False

Difference between synchronous speed and rotor speed.

2). False

3). True

4). True

Draft Gauge and Bourdon Gauge are used in the pressure measurement

9). kWh is for energy and KW is for power

15). The utility has to install capacitors to compensate.

16). Option c - Infrared camera. Explanation: Tachymeter is used to mesure speed based on time tavelled over a fixed distance. Whereas, Pshycrometer is used for measuring humidity of air

17). Combustion analyser

Hand held Flue Gas Analyser (FGA) A handheld FGA will typically measure O₂ and/or CO₂ and sometimes other toxic gases such as Nitric Oxide (NO) and Carbon Monoxide (CO). Various technologies are used for the gas measurement

18). Luminous Flux is the light energy radiated per second , Lm is its units.