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CONFIDENTIAL EH/MID-TERM/CPE© Hak Cipta Universiti Teknologi MARA CONFIDENTIALUNIVERSITI TEKNOLOGI MARAMID-TERM ASSESSMENTCOURSE : PROCESS SAFETYCOURSE CODE : CPE 615DATE : 25 th NOVEMBER 2020TIME : 2 HOURSINSTRUCTIONS TO CANDIDATES Answer ALL questions in English and handwritten using PEN only. Ens...

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CONFIDENTIAL

EH/MID-TERM/CPE615

UNIVERSITI TEKNOLOGI MARA MID-TERM ASSESSMENT

COURSE

:

PROCESS SAFETY

COURSE CODE

:

CPE 615

DATE

:

25th NOVEMBER 2020

TIME

:

2 HOURS

INSTRUCTIONS TO CANDIDATES

1.

Answer ALL questions in English and handwritten using PEN only.

2.

Ensure ALL answer scripts are written with FULL NAME and STUDENT ID.

3.

The answers script MUST be scanned and uploaded into designated Mid Term Assessment platform (Google classroom).

4.

Submission of the answer scripts SHALL not be later than 1:00 pm on 25th November 2020.

5.

Please include the following statement into the first page of your answer scripts for student integrity declaration and duly signed,

"I hereby declare that all the online submissions are based on my original efforts, not plagiarized from any source(s), nor attempting to or communicating with any other person during the assessment period. I am fully aware that candidates who are suspected of violating this pledge are liable to be referred to the Disciplinary Committee of the Faculty"

DO NOT TURN THIS PAGE UNTIL YOU ARE TOLD TO DO SO This examination paper consists of 3 printed pages

© Hak Cipta Universiti Teknologi MARA

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CONFIDENTIAL

2

EH/MID-TERM/CPE615

QUESTION 1 (PO8, CO1, CO2, CO3, C4, C5, C4, C5) Petrochemicals, produced from petroleum, can be classified as olefins and aromatics. Olefins include ethylene, propylene, and butadiene which are raw materials for making plastics. Ethylene is polymerized to produce polyethylene or, in combination with propylene, to produce copolymers that are used extensively in food-packaging wraps, plastic household goods, or building materials. A catastrophic explosion and fire at the Williams Olefins Plant in Geismar, Louisiana, on Oct. 17, 2017 occurred during nonroutine operational activities that introduced heat to a type of heat exchanger called a “reboiler” which was offline, creating an overpressure event that has resulted an equipment rupture. WorkSafeBC is preparing an incident investigation report (IIR) of the incident. You are one of the investigation team and you need to prepare the report. a) In your report, apply the factors in sequence that lead to the incident as proposed by Domino’s Theory. The incident animation may guide you to prepare the report. (10 marks) b) From the investigation, it was found that the company did not implement OSHA standards. Propose three (3) suitable regulations that Williams Olefins Plant should be implemented to develop standards and recommended safety practices for olefins industry. Justify your answer. (6 marks) c) Identify two (2) potential hazards that can be found from the incident and analyse the potential hazards that correspond to the incident scenario in Williams Olefins Plant. (10 marks) d) Recommend three (3) control measures or safeguards to improve safety and reliability of the Williams Olefins Plant. (6 marks) QUESTION 2 (PO8, CO3, C6, C5, C6, C5) a) LC is defined as Lethal Concentration and the LC values usually refer to the concentration of a chemical in air. The LC50 value is referring to the concentrations of the chemical in air that kills 50% of the test animals during the observation period and could benefit in establishing occupational exposure limits for human beings. Evaluate which is the most toxicant chemical from the list below when individuals are exposed for 30 minutes and suggest one (1) most suitable type of PPE for this chemical. State all your assumptions.

CONFIDENTIAL

i. ii. iii.

3

EH/MID-TERM/CPE615

Ammonia Nitrogen dioxide Carbon monoxide (13 marks)

b) Justify the exposure of workers in a plant if they are surrounded with a gas mixture consists of 5 ppm of ammonia, 30 ppm of nitrogen dioxide, 50 ppm of carbon monoxide and 20 ppm of hydrogen sulfide through TLV-TWA value. (5 marks)

END OF QUESTION PAPER

© Hak Cipta Universiti Teknologi MARA

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