100 sample questions for safety

8/17/2019 100 Sample QUESTIONS for Safety

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QUESTIONS AND ANSWERS

PART I. OBJECTIVE TYPE QUESTION

1.

A chemical or physical condition that has the potential to cause damage is themeaning of?

A. SafetyB. Hazard ☺C. RiskD. HA!"

2.

#hat is the total $ack pressure?

A. superimposed di%ided $y $uilt&up $ack pressuresB. superimposed multiply 'ith $uilt&up $ack pressuresC. minus of superimposed and $uilt&up $ack pressures

D. the sum of superimposed and $uilt&up $ack pressures☺

3.

#hat the guide 'ord (none of) mean in HA!" study?

A. *uantitati%e +ncreaseB. ,egation of +ntention☺C. *uantitati%e DecreaseD. *ualitati%e +ncrease

4.

#hat the guide 'ord (-ore of ) mean in HA!" study?

. *uantitati%e +ncrease☺

/. ,egation of +ntention0. *uantitati%e DecreaseH. *ualitati%e +ncrease

5.

#hat the guide 'ord (1ess of ) mean in HA!" study? A. *uantitati%e +ncreaseB. ,egation of +ntentionC. *uantitati%e DecreaseD. *uantitati%e Decrease☺

6.

#hat the guide 'ord ("art of ) mean in HA!" study?

A. ,egation of +ntentionB. *uantitati%e DecreaseC. *ualitati%e Decrease☺D. *uantitati%e Decrease

7.

#hat the guide 'ord ( As 'ell as) mean in HA!" study?

A. ,egation of +ntentionB. *uantitati%e DecreaseC. *ualitati%e +ncrease☺D. *uantitati%e Decrease

8. #hat the guide 'ord (Re%erse) mean in HA!" study?

A. Complete Su$stitution


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B. 1ogical !pposite☺C. ,egation of +ntentionD. *uantitati%e Decrease

9.

#hat the guide 'ord (!ther than) mean in HA!" study?

A. Complete Su$stitution☺B. 1ogical !ppositeC. ,egation of +ntentionD. *uantitati%e Decrease

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.

#hat are the typical material characteristic?

A. Reacti%ity2 /lamma$ility2 3o4icity2 Sta$ility☺B. Casta$ility2 permea$ility2 /lamma$ility2 3o4icityC. Reflecti%ity2 1uminosity2 Reacti%ity2 3o4icityD. Sta$ility2 permea$ility2 Reflecti%ity2 /lamma$ility

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.

#hat is the Attenuation step in inherent safety?

A. choosing and using smaller amounts of hazardous material.

B. replacing a hazardous material $y a less oneC. using hazardous materials in the least hazardous form☺D. made a system not only modest $y its look $ut also from its function

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.

#hat is the Simplification 5 error tolerance step in inherent safety?


B. replacing a hazardous material $y a less oneC. using hazardous materials in the least hazardous form

D. made a system not only modest $y its look $ut also from its function.☺

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.

#hat is the Su$stitution of effects step in inherent safety?


B. replacing a hazardous material $y a less one☺C. using hazardous materials in the least hazardous formD. made a system not only modest $y its look $ut also from its function

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.

#here should an air cooler e4changers take place from fired heaters?

A. at least 67 m %ertically from fired heaters.B. at least 87 m %ertically from fired heaters.

C. at least 67 m horizontally from fired heaters. ☺D. at least 87 m horizontally from fired heaters.

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.

#hat is recommended space for pump and 'ide foundation?

A. 7.9 & 8.7 meter and 6 meters center to center☺B. 8 & 8.9 meter and 6 meters center to center C. 7.9 & 8.7 meter and : meters center to center D. 6.7 ; :.7 meter and : meters center to center

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.

3he lo'est temperature at 'hich a li


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C. BondingD. !perating pressure

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.

#hat is the minimum spacing $et'een gas compressor and an open flames

A. 87 meters

B. 67 metersC. :7 meters☺D. =7 meters

18

.

#here is discharge check %al%es for an air compressors must $e installed

A. as near as possi$le to the comppressor☺B. as far as possi$le to the compressor C. :7 m from compressor D. 97 m form compressor

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.

#hat diameter of tank that a separate $ounded compound should $e pro%ided?

A. a$o%e => m☺B. a$o%e > mC. a$o%e 8> mD. a$o%e @> m

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.

#here is the control rooms2 and su$station shall $e spaced?

A. as far as possi$le to the process e


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.

A. /loating roof tanksB. /i4ed tankC. Domed or cone roof tanks 'ith internal floatersD. "ressure spheres☺

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.

#hat the spacing $et'een tanks e4ceed =9. meters 897 ft. in diameter?

A. minimum of 8 856 the diameter of the largest tankB. minimum of 856 the diameter of the largest tank☺C. minimum of 85= the diameter of the largest tankD. minimum of :5= the diameter of the largest tank

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.

#hat the spacing $et'een hot oil tanks heated a$o%e 9. !C 897 !/2e4cluding flash asphalt2 slop oil and emulsion $reaking tanks?

A. spaced apart $y the diameter of the largest tank in the group☺

B. minimum of 856 the diameter of the largest tankC. spaced apart $y the diameter of the smallest tank in the groupD. minimum of 85= the diameter of the largest tank

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.

Ho' to increasing inherent safety in reactor?

A. "ro%ide a 'elded pipeB. se less to4ic su$stance for sol%entC. Choose e


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33

#here the flare knock drum2 flare ignition and pumpout pump system should$e located?

A. minimum at @7 meters from other facilitiesB. at periphery of the clear area☺

C. 8> in. =9 mm upstream or do'nstream of a heating coilD. the nearest shut do'n %al%e

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.

#hat the ma4imum allo'a$le 'orking pressure of relie%ing pressure for firecontingency?

A. 89B. :9C. 68☺D. =:

35

Rupture disk structure consists of?

A. a thin diaphragm☺

B. a springC. a nozzleD. a %al%e

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#hat the defined of terms IinherentJ? A. the essential characteristic that not e4plicitly occured intrinsic ☺B. A chemical or physical condition that has the potential to cause

damageC. a measure of human inGury2 en%ironmental damage2 or economic loss

in terms of $oth the incident likelihoodD. Decreasing process pressures and temperatures

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#hat are types of relief de%ice are commonly used?

A. Con%entional relief %al%e2 $alanced relief %al%es2 pilot&operated relief %al%es2 rupture disk☺

B. 0lo$e %al%e2 Checked %al%e2 $alanced relief %al%es2 relief %al%eC. 0ate %al%e2 angel glo$e %al%e2 rupture disk2 $alanced relief %al%esD. Ball %al%e2 0ate %al%e 0lo$e %al%e2 Check %al%e

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#hat is the intensification step in inherent safety?

A. choosing and using smaller amounts of hazardous material. ☺

B. replacing a hazardous material $y a less oneC. using hazardous materials in the least hazardous form

D. made a system not only modest $y its look $ut also from its function

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#hat is the Su$stitution step in inherent safety?


B. replacing a hazardous material $y a less one☺C. using hazardous materials in the least hazardous formD. made a system not only modest $y its look $ut also from its function

40 'hat should $e used to pre%ent the possi$ility of feeding the fire in case of atu$e rupture or $reak in the distri$ution piping?

A. Automatic sprinklersB. fire detection


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C. automatic fire suppression systemD. Automatic and remotely operated %al%es and pump shutoffs☺

PART II. SHORT TYPE QUESTIONS

1.

#hat is -aterials Safety Data Sheet -SDS?

3he information of material. 3he -SDS contains the information needed to$egin analyzing materials and process hazards2 to understand the hazards to'hich the 'orkforce is e4posed2 and to respond to a release of the material or other maGor incident 'here emergency response personnel may $e e4posed tothe material.

2.

#hat is the /lash point?

3he lo'est temperature at 'hich a li


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3he employees are assumed to 'ork a total of 97 years. Hence2 the /AR is$ased on 87> 'orking hours

10.

#hat is the fatality rate?

an independent of the num$er of hours actually 'orked and reports only the

num$er of fatalities e4pected per person per year. 3his approach is useful for performing calculations on the general population2 'here the num$er of e4posed hours is poorly defined.

11.

#hat is the Hazard and !pera$ility Analysis HA!"?

Hazard and !pera$ility Analysis HA!" is one of the most used safetyanalysis methods in the process industry. +t is one of the simplest approaches tohazard identification. HA!" in%ol%es a %essel to %essel and a pipe to pipere%ie' of a plant. HA!" is $ased on guide 'ords such as no2 more2 less2re%erse2 other than2 'hich should $e asked for e%ery pipe and %essel

12.

#hat is the HA!" study focuses on?

A HA!" study focuses on specific points of a process called Lstudy nodes2Lprocess sections2 or operating steps. Depending on the e4perience of the studyleader2 the portion of a process included in a single study node can %ary. 3heHA!" team e4amines each study node for potentially hazardous processde%iations.

13.

#hat is the hazard analysis?

3he identification of undesired e%ents that lead to the materialization of ahazard2 the analysis of the mechanisms $y 'hich these undesired e%ents couldoccur and usually the estimation of the conse


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tur$ine air intakes 'hich shall $e in accordance 'ith manufacturerJsre


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to pre%ent air ingress into the flare system thus pro%iding flash$ack protection.Belo' is discussed that should $e considered to design seal drum

30.

'hat the function of relief system to safety?

Relief system is used 'hen inherently safe design simply cannot eliminate

e%ery pressure hazards and passi%e design can $e e4ceedingly e4pensi%e andcum$ersome

31.

#hat the function of "ressure relief system?

to protect piping and e


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41.

#hat are the factor selected to represent the inherent safety in "reliminary"rocess Design?Heat of Reaction2 Hazardous Su$stances2 Corrosi%eness2 Chemical +nteraction23emperature2 "ressure2


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falls off 'ith the distance.

• 1ess property damage caused $y a gi%en incident.

• asier access for emergency ser%ices such as fire fighting.

• asier access to e


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• Drainage and grade sloping

• "re%ailing 'ind direction

• /uture e4pansions

6.

#hat are the important factors in sitting central ser%ices2 such as the $oiler house2 cooling to'ers2 po'er station?

• Central ser%ices should not $e put out of action $y fire or e4plosion or

flood.

• Central ser%ices should not constitute a source of ignition.

• Cooling to'ers should $e located to minimize 'ater drift to a%oid

corrosion of other units.

• /lare stacks should $e located up'ind to minimize the ignition of %apor

cloud releases and should $e analyzed for intensity of thermal radiationand noise.

7.

#hat are the rule thum$s for layout and spacing of the 'aste treatment facilities?

• 1ocation of the 'aste treatment area should $e at a refinery5plant lo'

point to insure gra%ity flo' from all unit process areas. 3he lift stationscould also $e pro%ided.

• 3he 'aste treatment area must $e remoote from the process and utility

area and arranged to permit future e4pansion of the system.

• 3he layout of the area must in%ol%ing %ehicle accessi$ility for

maintenance purposes

8.

'hat are the items that should $e check in distillation?

• 1e%elness

• Do'ncomer clearance

• #eir heights

• +nlet 'eir clearance

• Bolt tightness

• /eed and reflu4 piping

• /a$rication rrors

9. #hat are the rule thum$s for layout and spacing of flare?

• Qeep the radiant flu4 $elo' allo'a$le limits $y mainting them 'ith a

sufficient space.

• /lare stack must $e placed remote from offsite and process facilities2

prefera$ly do'n 'idn from any areas 'here personnel are re


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cntinuous operation.

• /lare stack must $e located minimum at @7 meters from other facilities

and ha%e a clear perimeter surrounding them.

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0.

-entioned and e4plain four maGor categorize of strategies for designing

inherently safer design processes 'hich pu$lished $y Center for Chemical"rocess Safety CC"S?

• Su$titute +ncluding use less hazarous materials2 chemistry and

processes

• -inimize -inimze means only use a small


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• /atal Accident Rate /AR.

• /atality rate or deaths per person per year

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5.

#hat is an inherent safe plant relies on?

An inherent safe plant relies on chemical and physical parameter to pre%entaccidents rather than on control systems2 interlocks2 redundancy2 and specialoperating procedures to pre%ent accidents. +nherently safer plants are also moretolera$le of errors and are often the most cost effecti%e system that usuallyapplied in plant

100 sample questions for safety

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