CHAPTER 13 - SAFETY PROCEDURES AND DESIGN

Question 1

In Delegation, It is important to have ____ participation with regard to safety responsibilities

Answer 1

b.) employee

Question 2

Active systems include process control systems, ______, automatic _____, and automated
mitigation systems.

Answer 2

d.) safety interlocks; shutdown system

Question 3

What are the four categories of process safety strategies, in order?

Answer 3

a.) inherent, passive, active, and procedural

Question 4

_______ are prevented by managing the development and maintenance of important process
activities.

Answer 4

c.) Process accidents

Question 5

Motivate everyone influenced by this document to do what needs to be done.

Answer 5

b.) Communication

Question 6

simple and general description of a good management process includes deciding what needs to
be done, doing it, documenting that it has been done, and improving the process

Answer 6

c.) Managing Safety

Question 7

It describes what needs to be done to eliminate hazards and accidents.

Answer 7

a.) Documentation

Question 8

It identifies and implements ways to completely eliminate or significantly reduce hazards, rather
than to develop add-on protective systems and procedures.

Answer 8

d.) Inherent

Question 9

Which of these does not belong to Layers of Protection?

Answer 9

b.) Plant Emergency Retort

Question 10

Passive devices perform their intended functions without personnel or control actions. Passive
systems include ____, passive flame arrestors, and the use of welded fitting versus flanges and
_____ connections.

Answer 10

d.) dikes; threaded

Question 11

What designed and managed to help operators run a plant or facility with no problems or mishaps
are called?

Answer 11

c.) Operating procedures

Question 12

This should be highlighted with the consequences of exceeding these limits, and with steps to
correct or avoid deviations from normal conditions.

Answer 12

a.) Operating limits

Question 13

It is used to control nonroutine activities that are conducted in potentially hazardous environments.

Answer 13

a.) Permit

Question 14

It is used to prevent someone from being injured in a confined space.

Answer 14

b.) Vessel Entry Permit

Question 15

This permit prevents the ignition of flammable or combustible gases or liquids in a work
environment.

Answer 15

c.) Hot Work Permit

Question 16

This permit prevents injuries or damage due to the accidental release of stored energy from
equipment.

Answer 16

a.) Lock-Tag-Try Permit

Question 17

Typical activities that require this permit include an employee going into a danger zone (rotating
equipment or in a vessel with an agitator), repairing electrical circuits, maintaining machinery with
moving parts, cleaning jammed mechanisms, and removing guards or safety devices.

Answer 17

a.) Lock-Tag-Try Permit

Question 18

The permit includes a description of the hazards and actions taken to prevent accidents. The formal
permit communicates irrelevant information between the people doing the work and the operating
personnel who are affected by the work.

Answer 18

a.) First statement is true

Question 19

Hot work operations include welding, grinding, torch cutting or soldering, and any other ignition
sources. These permits are valid for only one shift at a time.

Answer 19

c.) Both statements are true

Question 20

The objectives of investigations are to identify the causes of incidents, understand the
interrelationship between causes, and develop actions to prevent the recurrence of similar incidents.
Review of accident investigations is particularly important after designing a new plant.

Answer 20

a.) First statement is true

Question 21

Design steam, water, electricity, and air supplies to be available during emergencies. Place substations
away from process areas

Answer 21

a.) Utilities

Question 22

A twofold strategy is used to limit the potential damage from fires and ________.

Answer 22

a.) explosions

Question 23

. The process of adding an inert gas to a combustible mixture to reduce the concentra- tion of
oxygen below the limiting oxygen concentration (LOC)

Answer 23

b.) Inerting

Question 24

Is the most common inerting procedure for vessels.

Answer 24

d.) Vacuum Purging

Question 25

Design to consume the reactants rapidly to avoid the accumulation of reactants. Design the system to
remove the heat and gaseous products generated by the reactions

Answer 25

d.) Both statements are true.

Question 26

Add ________ to prevent runaways due to equipment and control failures

Answer 26

b.) safeguards

Question 27

________ have flammability regions similar to gases, and they can burn and explode as deflagrations
and detonations.

Answer 27

d.) Dust

Question 28

____________ have the five-sided fire pentagon that includes fuel, an ignition source, oxygen, low
moisture, and suspension in air.

Answer 28

d.) Flammable Dusts

Question 29

_____________ have a three-sided fire triangle that illustrates the three necessary conditions for
fires; that is, to burn a flammable gas you need fuel (flammable gas) and an ignition source, and oxygen.

Answer 29

a.) Flammable gases

Question 30

When transferring dusts to ___________, use containment and inerting

Answer 30

b.) Flammable liquids

Question 31

What does inherently safer technology (IST) aim to achieve?

Answer 31

B) Permanently eliminate or reduce hazards

Question 32

Which of the following is NOT one of the four alternatives for achieving inherent safety?

Answer 32

C) Maximize

Question 33

What is the primary function of a double block and bleed system?

Answer 33

B) To prevent reactor contents from
backing up into feed tanks

Question 34

How do safeguards or redundant controls contribute to process safety?

Answer 34

C) By providing additional layers of safety to prevent accidents

Question 35

What is the purpose of block valves in chemical plants?

Answer 35

B) To shut down a system during unusual circumstances

Question 36

What does an explosion suppression system do?

Answer 36

B) Detects flames and injects flame-quenching

Question 37

What is the function of flame arrestors in a chemical process?

Answer 37

B) To quench flames and prevent propagation in pipelines

Question 38

Why is material selection crucial in process vessel design?

Answer 38

C) It helps withstand internal and external

Question 39

What happens during deflagrations in pipes or vessels?

Answer 39

B) They result in gradual pressure increases with localized tears.

Question 40

In what scenario are detonations most likely to occur?

Answer 40

B) In pipelines with large length-to-diameter ratios