recommended that this model should receive maintenance every 3,000-6,000 hours of
operation. If each maintenance check costs $220 and the machine is expected to provide
30,000 hours of service, what is the total savings of scheduling maintenance every 6,000
hours over 3,000 hours?
4)
Answer: $1100
5) A company is considering two types of water heaters. The associated costs are shown
below. The estimated annual cost of operation for oil heaters equals 365 x 41045/EF x Fuel
Cost per Btu. The estimated annual cost of operation for electric heaters equals 365 x
12.03/EF x Electricity Cost per kWh. How much money could be saved each year if the
company used an oil heater?
Alternative Electricity Oil
Price of water heater $39,000 $36,000
EF 2.05 1.7
Fuel cost $0.095/kWh $0.0000064/Btu
Annual maintenance costs $1000 $500
5)
Answer: $647.08
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