WorksheetsATCTCO - PRACTICE SET 2
Total questions: 25
Worksheet time: 25mins
In chemical tankers, to avoid having a deteriorating effect on cargoes and also to avoid cargoes attacking them, steam heating coil are generally made of:
Cuprous alloys
Stainless steel
Mild steel
Copper
Stainless steel tanks are sometimes required to be 'passivated' especially after tank surface repairs have been carried out and aggressive cargoes are to be loaded. 'Passivation' normally consists of:
Grinding off any corrosion spot with a grinding disc of about '80 grain'
Spraying concentrated hydrofluoric acids in the tank and then wiping it off
Applying 12 - 15% nitric acid on tank surfaces, either then washing off after 10 - 20 minutes using copious amounts of fresh water
Cleaning the tank by application of caustic soda on all surfaces, then washing it off using copious amounts of fresh water
Epoxy coatings in tanks, which have been stressed beyond their chemical resistance during the carriage of strong solvents, tend to soften (you test for this with your nails or with standardised test pencils). If you encounter this condition you would:
Heat up the coating and try to speed up the re-hardening process
Do nothing - the softness of the coating is not of any consequence
Give the coating time to 'weather out' the trapped solvents using good ventilation, and recover it's hardness again, prior loading the next cargo
Inform the Owner that the coating has been rendered useless
In the chemical trade the acceptable means of cargo line segregation in case of two non-compatible products is:
By double valve segregation
By double blank flanges with a drain between them
By double valve segregation and using sluice valves
By double blank flanges with a drain between them
Chemical tankers are built with either 'gravity' or 'pressure' type cargo tanks. A 'gravity' tank is one having a design pressure at the top of the tank of:
2.7 bar
1.7 bar
0.7 bar
0.07 bar
Sometimes, in order to improve suction to the pumps when discharging "light" or "gassing" cargoes, the tanks are pressurised by admission of inert gas under overpressure from the inert gas fans. In this respect one must remember that tanks are generally dimensioned to withstand a vapour pressure of:
2500 mm wg
1200 mm wg
3200 mm wg
4000 mm wg
Submerged pumps are commonly driven _____
mechanically
by steam
electrically
hydraulically
To accommodate expansion of piping on the deck of a chemical tanker the following are fitted:
Expansion glands
Natural bends at intervals
Flanges on the pipes at frequent intervals
Stainless Steel Extra strong pipes that can withstand the forces of expansion
The category of cargo requiring the most efficient stripping arrangement is Category _____
A
B
C
D
Before cargo operations start the Master should establish proper liaison between the ship and _____
Operator
Terminal
Harbour Control
Port Authority
Cargos carried by a tanker as miscellaneous liquids are
palm oil molasses tallow
soybean oil sunflower oil other vegetable oil
animal oils grease
fresh water wine beer
Boric acid molten sulfur caustic soda Etc are chemicals categorized as
organic chemicals
volatile chemicals
inorganic chemicals
solid chemicals
What are the three board classification of cargos transported on tankers
Liquefied natural gas, liquefied petroleum gas, liquefied nitrogen
Container, dry bulk and refrigerated cargo
petroleum liquids, chemical liquids and special liquids
General cargo, dry brake bulk and Frozen cargo
answer
Petroleum liquids, chemical liquids and special liquids
The chemical liquids may be categorized as
organic or inorganic
volatile or non-volatable
flammable or combustible
petroleum are special
Find the correct statement with respect to special liquids carried in tankers
special liquids are divided into three groups as animal oils vegetable oils and miscellaneous liquids
special liquids are divided into two groups as animals oil and miscellaneous liquids
special liquids are divided into two groups animal or vegetable oils and miscellaneous liquids
special liquids are divided into three groups as chemical liquids vegetable oils and miscellaneous liquids
Organic chemical liquids are
Phosphoric acid hydrochloric acid molten sulfur
Tallow and greases molasses wine
Boric acid acetone caustic soda
Vinyl chloride acetone acetic acid
Liquids that have an open cup flash point at or below 80 degree Fahrenheit 26.7 degrees Celsius are classified as
non-volatable liquids
flammable liquids
volatile liquids
combustible liquids
Tankers carry palm oil molasses and Tallow as special liquids cargos and bulk which are grouped as
animal or vegetable oils
miscellaneous liquids
non-volatable liquids
other chemical liquids
For the titration between oxalic acid and sodium hydroxide the indicator used is
Potassium permanganate
Phenolphthaleine
Litness
Aluminium Sulphate
_________ is the process of separating any substance from its Solution by removing water
distillation
evaporation
decantation
filtration
In chemical storage, what is the primary purpose of secondary containment?
Rapid disposal of spilled chemicals
Containment of hazardous substances in case of spills
Enhancing visual appeal of storage areas
Minimizing employee exposure to chemicals
Which chemical process involves the combination of two or more substances to form a new product?
Decomposition
Combustion
Synthesis
Sublimation
What is the primary function of a chemical reactor in the manufacturing process?
Storage of finished products
Initiation of chemical reactions
Transportation of raw materials
Quality control of end products
In chemical analysis, what does the acronym "NMR" stand for?
Nuclear Magnetic Resonance
Non-Metallic Reaction
Networked Manufacturing Resource
Nitrogen Management in Reactors
What is the primary purpose of a chemical spill response plan?
Minimize public awareness
Maximize chemical production
Ensure rapid disposal of spilled chemicals
Minimize environmental and health risks
