Site MapHelpFeedbackS-Self Quiz from CD
S-Self Quiz from CD
(See related pages)



1

Reliabilities are typically specified with respect to normal operating conditions.
A)True
B)False
2

If a system is made up of two components that are in series, and both have failure rates of 50%, the probability that the system will fail is 75%.
A)True
B)False
3

The probability that a serial system will work is the sum of the probabilities that each component will work.
A)True
B)False
4

A system is composed of three components, 1. II, III. All three of these components must function in order for the system to work. Their reliabilities are respectively: I. 0.4; 11, 0.5; III, 0.5. The overall system reliability is:
A)0.70
B)0.99
C)0.10
D)0.18
E)0.97
5

A life test has shown that coffeemakers fail in use at the rate of 0.04257 per month. The manufacturer warranties that a coffeemaker will last for 12 months of ordinary usage. What is the reliability of a coffeemaker?
A)0.4
B)0.5
C)0.6
D)0.7
E)0.8
6

A system is composed of two parts which must both operate in order for the system to perform as intended. The parts have reliabilities of .6 and .5. There is an identical backup system connected to the main system by a switch which has a reliability of .9. The probability that the overall system will operate is closest to:
A).30
B).40
C).50
D).60
E).70
7

If the transformer has a mean time to wear-out of 20 years with a standard deviation of 2 years, what is the probability that it will wear out within 19 years?
A)0.1915
B)0.3085
C)0.383
D)0.5
E)0.6915





To learn more about the book this website supports, please visit its Information Center.
(c)2002 McGraw-Hill Higher Education
Any use is subject to the Terms of Use and Privacy Policy.
McGraw-Hill Higher Education is one of the many fine businesses of The McGraw-Hill Companies.


Stevenson OM7Online Learning Center with Powerweb

Home > Chapter 4 > S-Self Quiz from CD