Fifty Defibrillators Are Tested for 48 Hours Per Machine

question 31

Multiple Choice

Fifty defibrillators are tested for 48 hours per machine. Of all the machines tested, 2 experience malfunctions during the test. What is the failure rate for the machines?

• A) 0.004
• B) 0.042
• C) 0.01
• D) 0.008
• E) 0.0008

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Definitions:

Driveshaft Assembly

A mechanical component used to transmit torque from the vehicle's engine to its wheels.

Chassis

The base frame of a vehicle to which various components are attached.

Center Support Bearing

A hanger bearing used to suspend the first section of a driveshaft in a double driveshaft assembly. It is required on truck driveshafts when the distance between the transmission and drive carrier exceeds 70 inches (178 cm) and consists of a rolling bearing element supported by a rubber insulator and bracket. Also known as hanger bearing.

Maximum Length

The greatest length allowed or possible for a given object, system, or dimension.