ABS Specializes in Repair and Maintenance of Industrial Machines

question 58

Multiple Choice

ABS specializes in repair and maintenance of industrial machines.One repair technician has been assigned to five identical grinding machines for repair and maintenance.The machine breaks down after about 20 hours of use,and breakdowns have a Poisson probability distribution.It takes 6 hours to repair a machine,and repair times follow an exponential distribution.Machine downtime costs the company $250 an hour,and the technician is paid $50 an hour.Determine the average cost per hour of downtime.

• A)$500.34
• B)$532.50
• C)$234.50
• D)$675.50

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Definitions:

Wind Erosion

The removal of soil, rock fragments, or fine particles by the force of the wind over land surfaces.

Volcanic Necks

Solidified lava within the conduit of an extinct volcano, exposed after the surrounding softer rock has eroded away.

Desertification

The converting of a land into a desert by natural or human causes.

Evaporation

The process where liquid water transforms into vapor and enters the atmosphere.