Question Final Exam(1)
Content
PART A (50 marks) Time : 1 hour 30 minutes INSTRUCTION This part consists of FIVE (5) questions. Ans er ALL questions in the ans er !ook"et pro#i$e$.
1) Explain the following term: a) Process flowchart b) Layout plan c) Explain two basic requirement for work unit (3 marks) (3 marks) ( marks)
! "n the chemical health risk assessment process# the hazard rating is use$ to prioriti%e ha%ar$ base$ on the potential health effect of the chemical& 'he chemicals ha%ar$ous to health nee$ to be categorise$ into two groupings base$ on systemic effects an$ local effects& (ase$ on the chemical preparation below# please $etermine the ha%ar$ rating of that preparation: ) chemical preparation containing 3*+ xylene an$ ,*+ non-ha%ar$ous ingre$ients& 'his preparation has been $etermine$ to be harmful by inhalation an$ in contact with skin (.!*/!1) an$ irritating to skin (.30)& (y referring to Table 2# please reclassify this preparation for assessment& (1* marks) 3& ) worker is expose$ to asbestos fibers& .esults of two samples taken o1er an 0 hours perio$ are: 2uration .esults !** minutes 1&1 fiber/ml !3* minutes 1&3 fiber/ml (PEL for asbestos exposure is 1 fiber/ml) 3hat is his $egree of exposure assuming4 a) 5imilar exposure for the unmeasure$ time perio$4 (6 marks) b) 7ero exposure for the unmeasure$ time perio$4 (3 marks) c) (y using 'able 6# please assign the magnitu$e rating (8.) for the similar exposure (a) (! marks) & ) chemical management is important because it is a roa$map for companies to establish# buil$# maintain an$ impro1e chemicals management processes# an$ integrate them with other business processes as part of an o1erall corporate management system& Please state 5 important principle involved in the Chemical Management System. (1* marks) 6& "n trying to control the i$entifie$ risks# the measure taken shoul$ be in a certain hierarchy or or$er of priority an$ an assessment of the a$equacy of the control measures nee$ to be ma$e& Please explain the hierarchy of control measure in order. (1* marks)
PART B (50 marks) Time : 1 hour 30 minutes INSTRUCTION This part consists of T%& (') questions. Ans er ALL questions in the ans er !ook"et pro#i$e$.
1) "n 8alaysia# un$er the 9ccupational 5afety an$ :ealth )ct 1;; # employers are responsible for protecting their workers from the a$1erse effect of chemicals& "n this act# the assessment of chemicals use$ in the workplace must be performe$ in or$er to i$entify# e1aluate an$ control health risk associate$ with the exposure to chemicals& )s an assessor# you are assigne$ to con$uct the <hemical :ealth .isk )ssessment (<:.)) in automoti1e pro$uction facility base$ on following situation& ) worker in the painting section is expose$ to trichloroethylene ('<E) once a $ay for 6 $ay working week& 'he a1erage $uration of exposure to '<E is about &! hours per $ay& 8easurement of '<E le1el in painting section showe$ that the a1erage concentration of '<E is 1!* ppm& (PEL of '<E = 6* ppm)& 'richloroethylene is harmful through inhalation an$ if swallowe$ (.!*/!!)& >ote$ that# the existing control measure which is local exhaust 1entilation (LE?)# the capture 1elocity was not within the recommen$e$ 1alue for '<E& a) (y using the 'able ! please $etermine the ha%ar$ rating (:.) of trichloroetylene ('<E) (! marks) b) <alculate the total $uration of exposure an$ assign the $uration rating (2.) by using the 'able & (6 marks) c) <alculate the time weighte$ a1erage ('3)) of '<E exposure an$ by using the 'able 6 please assign the magnitu$e rating (8.) of '<E& Exposure (@ marks) $) base$ on the $uration rating (2.) an$ magnitu$e rating (8.)# hence please assign the exposure rating (E.) by using 'able 11& (! marks) e) by using the risk matrix table ('able 1!)# assign the risk rating (..) for trichloroetylene an$ e1aluate the risk# hence summari%es your $ecision for the risk e1aluate$& (6 marks) f) (ase$ on your risk $ecision an$ the assessment of existing control measure# please conclu$e the risk assessment of the '<E exposure& (6 marks) g) base$ on your risk $ecision an$ your conclusion on this assessment# state the appropriate or possible action to be taken inclu$ing suggesting for further precautions& (6 marks)
!) ) <hemical :ealth .isk )ssessment (<:.)) is con$ucte$ with the purpose of enabling $ecision to be ma$e in or$er to protect the health of employees who may be at risk towar$s the exposure of ha%ar$ous chemicals& Please briefly explain the steps that in1ol1e$ in the <:.)& (!* marks)
1) Explain the following term: a) Process flowchart b) Layout plan c) Explain two basic requirement for work unit (3 marks) (3 marks) ( marks)
! "n the chemical health risk assessment process# the hazard rating is use$ to prioriti%e ha%ar$ base$ on the potential health effect of the chemical& 'he chemicals ha%ar$ous to health nee$ to be categorise$ into two groupings base$ on systemic effects an$ local effects& (ase$ on the chemical preparation below# please $etermine the ha%ar$ rating of that preparation: ) chemical preparation containing 3*+ xylene an$ ,*+ non-ha%ar$ous ingre$ients& 'his preparation has been $etermine$ to be harmful by inhalation an$ in contact with skin (.!*/!1) an$ irritating to skin (.30)& (y referring to Table 2# please reclassify this preparation for assessment& (1* marks) 3& ) worker is expose$ to asbestos fibers& .esults of two samples taken o1er an 0 hours perio$ are: 2uration .esults !** minutes 1&1 fiber/ml !3* minutes 1&3 fiber/ml (PEL for asbestos exposure is 1 fiber/ml) 3hat is his $egree of exposure assuming4 a) 5imilar exposure for the unmeasure$ time perio$4 (6 marks) b) 7ero exposure for the unmeasure$ time perio$4 (3 marks) c) (y using 'able 6# please assign the magnitu$e rating (8.) for the similar exposure (a) (! marks) & ) chemical management is important because it is a roa$map for companies to establish# buil$# maintain an$ impro1e chemicals management processes# an$ integrate them with other business processes as part of an o1erall corporate management system& Please state 5 important principle involved in the Chemical Management System. (1* marks) 6& "n trying to control the i$entifie$ risks# the measure taken shoul$ be in a certain hierarchy or or$er of priority an$ an assessment of the a$equacy of the control measures nee$ to be ma$e& Please explain the hierarchy of control measure in order. (1* marks)
PART B (50 marks) Time : 1 hour 30 minutes INSTRUCTION This part consists of T%& (') questions. Ans er ALL questions in the ans er !ook"et pro#i$e$.
1) "n 8alaysia# un$er the 9ccupational 5afety an$ :ealth )ct 1;; # employers are responsible for protecting their workers from the a$1erse effect of chemicals& "n this act# the assessment of chemicals use$ in the workplace must be performe$ in or$er to i$entify# e1aluate an$ control health risk associate$ with the exposure to chemicals& )s an assessor# you are assigne$ to con$uct the <hemical :ealth .isk )ssessment (<:.)) in automoti1e pro$uction facility base$ on following situation& ) worker in the painting section is expose$ to trichloroethylene ('<E) once a $ay for 6 $ay working week& 'he a1erage $uration of exposure to '<E is about &! hours per $ay& 8easurement of '<E le1el in painting section showe$ that the a1erage concentration of '<E is 1!* ppm& (PEL of '<E = 6* ppm)& 'richloroethylene is harmful through inhalation an$ if swallowe$ (.!*/!!)& >ote$ that# the existing control measure which is local exhaust 1entilation (LE?)# the capture 1elocity was not within the recommen$e$ 1alue for '<E& a) (y using the 'able ! please $etermine the ha%ar$ rating (:.) of trichloroetylene ('<E) (! marks) b) <alculate the total $uration of exposure an$ assign the $uration rating (2.) by using the 'able & (6 marks) c) <alculate the time weighte$ a1erage ('3)) of '<E exposure an$ by using the 'able 6 please assign the magnitu$e rating (8.) of '<E& Exposure (@ marks) $) base$ on the $uration rating (2.) an$ magnitu$e rating (8.)# hence please assign the exposure rating (E.) by using 'able 11& (! marks) e) by using the risk matrix table ('able 1!)# assign the risk rating (..) for trichloroetylene an$ e1aluate the risk# hence summari%es your $ecision for the risk e1aluate$& (6 marks) f) (ase$ on your risk $ecision an$ the assessment of existing control measure# please conclu$e the risk assessment of the '<E exposure& (6 marks) g) base$ on your risk $ecision an$ your conclusion on this assessment# state the appropriate or possible action to be taken inclu$ing suggesting for further precautions& (6 marks)
!) ) <hemical :ealth .isk )ssessment (<:.)) is con$ucte$ with the purpose of enabling $ecision to be ma$e in or$er to protect the health of employees who may be at risk towar$s the exposure of ha%ar$ous chemicals& Please briefly explain the steps that in1ol1e$ in the <:.)& (!* marks)
