Exam (elaborations)
OSHE 424 Questions & Detailed Answers
- Course
- OSHE 424
- Institution
- Eastern Kentucky University
OSHE 424 Questions & Detailed Answers
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OSHE 424 Questions & Detailed AnswersEvaluates the potential for an accident that results from a known initiating event
or cause - ANS ETA
an inductive reasoning process where the analyst begins with an initiating event
and develops the possible sequences of events that lead to potential
consequences - ANS ETA
a fully-quantitative method of risk analysis. - ANS ETA
Both the ________ and the ________ must be known (from insurance data or
from documented field data). - ANS Severity and Likelihood
is a failure analysis in which an undesired state of a system is analyzed using
Boolean logic to combine a series of lower-level events. - ANS FTA
FTA definition - ANS - FTA is a failure analysis in which an undesired state of a
system is analyzed using Boolean logic to combine a series of lower-level events.
- FTA is a very detailed deductive technique for determining the various ways in
which a particular type of failure could occur.
- FTA is a fully-quantitative analysis method where BOTH the severities and
likelihoods must be calculated (not estimated).
, FTA can - ANS - Model the likelihood of one undesirable event of interest (called
the"Top Event")
- Multiple equipment failures that result in a single system failure (theTop Event)
- Model systems with well-defined energy flow paths
Primary Fault - ANS - is denoted with a circle or a house symbol. It is a
condition that can occur on its own with no contributing factors.
- malfunctions occur when the component is operating in the
environment for which it is intended
Secondary Fault - ANS - Is usually denoted with a rectangle or a diamond. It is
a condition that requires contributing factors to occur.
- can be an equipment malfunction that occurs in an environment outside of the
intended operating envelope.
- can be caused by factors external to the system.
Command Fault - ANS typically describes a situation in which the
component has not physically failed but operates in the wrong time or context. In
such conditions, the component typically produces no output or incorrect output
in response to inappropriate or misleading inputs received either from sensors or
controllers that control its operation.
1. Define the problem - ANS Top event
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