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CHE 135-HAZARD AND RISK ASSESSMENT

Total questions: 40

Worksheet time: 3hrs 36mins

Name
Class
Date
1.

HAZOP is?

a)

Hazard and operability studies

b)

Hazardous and operability studies

c)

Hazard and operate studies

d)

Hazard and operability for studies

2.

FTA is?

a)

Faulty analysis

b)

Fault tree analysis

c)

Fault trees analysis

d)

Fault tree analyse

3.

ETA is?

a)

Event trees analysis

b)

Event tree analysis

c)

Events tree analysis

d)

Event tree analyse

4.

Choose hazard identification methods/s

a)

Process hazards checklists

b)

Hazards surveys

c)

Hazards and operability (HAZOP) studies

d)

Safety review

e)

All of above

5.

Choose correct meaning for NO/NOT/NONE guide word.

a)

The logical opposite of

b)

Qualitative decrease

c)

Qualitative increase

d)

The complete negation of the intention

6.

Choose correct meaning for MORE/HIGHER/GREATER guide word.

a)

In additional location

b)

Complete substitution

c)

Quantitative increase

d)

Qualitative increase

7.

Choose correct meaning for LESS/LOWER guide word.

a)

Quantitative decrease

b)

Qualitative decrease

c)

Complete substitution

d)

The logical opposite of

8.

Choose process flow parameter/s applicable in HAZOP studies.

a)

Flow

b)

Pressure

c)

Temperature

d)

Level

e)

All of above

9.

Choose function of team leaders in HAZOP team members.

a)

answer questions about the plant and process

b)

Understand and explain the plant design

c)

Planning and preparation

d)

Participant in study

10.

Lists four(4) advantages of hazard and operability studies.

4 lines
11.

Choose correct information/s about FTA

a)

Originated in the aerospace industry and have been used extensively by the nuclear power industry to qualify and quantify the hazards and risks associated with nuclear power plants.

b)

Applicable for anything but the simplest of plants can be large, involving thousands of process events.

c)

This approach is becoming more popular in the chemical process industries, mostly as a result of the successful experiences demonstrated by the nuclear

industry.

d)

A deductive method for identifying ways in which hazards can lead to accidents.

e)

All of above

12.

This FTA symbol represents?

a)

AND gate

b)

OR gate

c)

BASIC event

d)

INTERMEDIATE event

e)

None of the above

13.

This FTA symbol represents?

a)

EXTERNAL event

b)

UNDEVELOPED event

c)

OR gate

d)

AND gate

e)

None of the above

14.

This FTA symbol represents?

a)

BASIC event

b)

INTERMEDIATE event

c)

UNDEVELOPED event

d)

EXTERNAL event

15.

This FTA symbol represents?

a)

AND gate

b)

OR gate

c)

BASIC event

d)

INTERMEDIATE event

16.

This FTA symbol represents?

a)

EXTERNAL event

b)

INTERMEDIATE event

c)

UNDEVELOPED event

d)

BASIC event

17.

This FTA symbol represents?

a)

BASIC event

b)

EXTERNAL event

c)

INTERMEDIATE event

d)

UNDEVELOPED event

18.

Choose advantages of FTA

a)

Begins with top event

b)

Use to determine the minimal cut sets

c)

Can be effectively performed on varying leves of design detail.

d)

All of above

19.

Choose disadvantages of FTA

a)

Complicated process

b)

Require considerable amount of time to complete

c)

Require an analyst with some training and practical experience.

d)

All of above

20.

Choose advantages of ETA

a)

Use to determine the minimal cut sets

b)

Begins with top event

c)

Can be effectively performed on varying leves of design detail.

d)

None of above

21.

Choose disadvantages of ETA

a)

Require considerable amount of time to complete

b)

Require an analyst with some training and practical experience

c)

An analysis only have one initiating events, therefore multiple analysis will be required

d)

All of above

22.

________begin with a top events and work backward toward the initiating events

a)

HAZOP

b)

ETA

c)

FTA

d)

QRA

23.

_______begin with an initiating event and work toward the top events

a)

QRA

b)

HAZOP

c)

FTA

d)

ETA

24.

Discuss the relationship between FTA and ETA

4 lines
25.

Refer to figure and choose the correct answers.


A=B________C

B ______ C must occur

for event A to occur

a)

Union,OR

b)

Intersection,OR

c)

Union,AND

d)

Intersection,AND

26.

Refer to figure and choose the correct answers.

D= E __________ F

E_____ F must occur

for D to occur

a)

Union,OR

b)

Intersection,OR

c)

Union,AND

d)

Intersection,AND

27.

Arrange the typical steps in event tree analysis in correct order.


A.Identify the safety functions designed to deal with the initiating event

B.Describe the resulting accident event sequences.IV.

C.Construct the event tree

D.Identify an initiating event of interest

a)

D>A>C>B

b)

A>B>C>D

c)

D>B>C>A

d)

B>A>C>D

28.

The ETA is written from ________ to ________.

a)

left,right

b)

top,bottom

c)

right,left

d)

bottom,top

29.

Figure representing a fault tree describing the various events contributing to a flat tire.Choose correct FTA symbols for the event.

a)

A=AND,B=AND

b)

A=AND,B=OR

c)

A=OR,B=OR

d)

A=OR,B=AND

30.

Choose detailed information on the process must be available in order to perform HAZOP analysis.

a)

Process flow diagrams (PFDs)

b)

Process and instrumentation

diagrams (P&IDs)

c)

Detailed equipment specifications

d)

Materials of construction

e)

Mass and energy balances

31.
  1. A formal procedure to identify hazards in a chemical process facility.
  2. The procedure is effective in identifying hazards and is well accepted by the chemical industry.
  3. The basic idea is to let the mind go free in a controlled fashion in order to consider all the possible ways that process and operational failures can occur.


Statements above best to describe about?

a)

FTA

b)

ETA

c)

HAZOP

d)

Hazard survey

32.

What are roles of RECORDER in HAZOP team members?

a)

Understand and explain the plant design

b)

Answer questions about the plant and process

c)

Document the analysis

d)

Participant in study

e)

All of above

33.

Identify sections that is/are not available in HAZOP study form.

a)

Deviation

b)

Consequence

c)

Guide words

d)

Cause

e)

None of above(all included)

34.
  1. Begin with an initiating event and work toward a final result. This approach is inductive.
  2. The method provides information on how a failure can occur and the probability of occurrence.
  3. When an accident occurs in a plant, various safety systems come into play to prevent the accident from propagating.
  4. These safety systems either fail or succeed. The analysis approach includes the effects of an event initiation followed by the impact of the safety systems.


Statements above best described?

a)

FTA

b)

ETA

c)

HAZOP

d)

Safety review

35.

What are the definitions of hazards?

4 lines
36.

What are the definitions of operability?

4 lines
37.

What are the definitions of risk?

4 lines
38.

This is example of ?

a)

FTA

b)

ETA

c)

HAZOP

d)

All of above

39.

This is an example of ?

a)

FTA

b)

HAZOP

c)

ETA

d)

QRA

e)

None of the above

40.

Identify type of symbols used in Q39.

a)

AND gate

b)

OR gate

c)

BASIC event

d)

INTERMEDIATE event

e)

All of above

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