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Basics Energy Efficiency Choose the correct answer : QUESTION 12 Which knowledge in the hands of an industrial...

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Electrical Engineering

Basics Energy Efficiency

Choose the correct answer :

QUESTION 12

  1. Which knowledge in the hands of an industrial consumer is mostlikely to lead to discovery of the most valuable energy costsavings?

a-The total energy bill
b-The energy bill split between sub-divisions of the plant
c-The energy bill split between end-uses on the plant

d-Time-based energy consumption profiles per end-use

QUESTION 13

  1. Suppose that we have a motor three phase voltages as 404, 395and 380 volts. Calculate the voltage imbalance??

a- 3.2 %
b - 3.3%
c- 3.4%
d- 3.5%

QUESTION 14

  1. A recent advertisement said an IE3 (premium efficiency) 50 kWmotor is available at 95%. It would replace an IE1 motor thatpresently runs at 91% efficiency. Given that (Motor runs 2,920hours/year, Demand cost is $ 10.00 kW per month, Energy cost is$0.6/kWh and Motor runs at 85% partial load all the time),calculate the annual savings ?

a-$ 580.44
b-$ 670.31
c-$ 1,741.15
d-$ 120.44

QUESTION 15

  1. A three-phase 90 kW motor which has an efficiency of 92.5%. Ifits operated with an electrical power input 68.1 kW, at what loadfactor the motor is operated?

a-80%
b-75%
c-70%
d-65%

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