CHEMCO - Advanced Training for Chemical Tanker Cargo Operations Exit Exam Questions - Set 14

Question 1

The minimum concentration of a vapor in air which can form an explosive mixture is called the

Accepted Answer

C: lower explosive limit (LEL)

Answer

A: auto-ignition point

Answer

B: flash point

Answer

D: threshold limit value (TLV)

Question 2

What is the material used in cargo pump?

Accepted Answer

D: Stainless steel

Answer

A: EN 8

Answer

B: Bronze

Answer

C: Aluminium

Question 3

What happens in the volute casing of the centrifugal pump?

Accepted Answer

C: Kinetic energy converted into pressure energy

Answer

A: Pressure energy converted into Kinetic energy

Answer

B: Velocity of the liquid increases

Answer

D: Air bubbles are produced, creating cavitation

Question 4

How the speed of the cargo pump in a Framo system can be varied?

Accepted Answer

B: By controlling the amount of hydraulic oil to the hydraulic motor

Answer

A: Speed of the cargo pump in Framo system is not varied at all

Answer

C: By controlling the amount of hydraulic oil to the cargo pump

Question 5

What type of pump, the FRAMO system uses for liquid chemical cargo?

Accepted Answer

C: Centrifugal pump

Answer

A: Reciprocating pump

Answer

B: Variable delivery axial flow pump

Answer

D: Gear pump

Question 6

What is the purpose of the seal?

Accepted Answer

C: To prevent mixing of both Cargo and Hydraulic oil seeping into other’s place

Answer

A: To prevent hydraulic oil to seep to the cargo oil side

Answer

B: To prevent cargo oil to seep to the hydraulic oil side

Question 7

Each inert gas system gas main must have an automatic shut down valve at the outlet of the gas production plant.

Accepted Answer

B: blower failure

Answer

A: cargo pump failure

Answer

C: deck seal low water level

Answer

D: low inert gas temperature

Question 8

Cargoes carried by a tanker as miscellaneous liquids are

Accepted Answer

D: Freshwater, Wine, Beer

Answer

A: Palm oil, molasses, tallow

Answer

B: Soybean oil, Sunflower oil, Other vegetable oils

Answer

C: Animals oils, Grease

Question 9

The organic chemical liquids are

Accepted Answer

D: Vinyl chloride, Acetone, Acetic acid

Answer

A: Phosphoric acid, Hydrochloric acid, Molten sulfur

Answer

B: Tallow and greases, Molasses, Wine

Answer

C: Boric acid, Sulfuric acid, Caustic soda

Question 10

The chemical liquids may be categorized as

Accepted Answer

A: Organic or Inorganic

Answer

B: Volatile or Non-volatile

Answer

C: Flammable or combustible

Answer

D: Petroleum or special

Question 11

Why personal protective equipment may be required when a chemical tanker carry high vapor pressure cargo?

Accepted Answer

A: Because high vapor pressure releases more vapor

Answer

B: Because high vapor pressure releases less vapor

Answer

C: Because high vapor pressure releases hot vapor

Answer

D: Because high vapor pressure releases cold vapor

Question 12

Molarity = Number of moles of solute per

Accepted Answer

B: Solution in litres

Answer

A: Solvent in kilograms

Answer

C: Mililitres

Answer

D: Litres

Question 13

Vegetable and animal oils may vary in composition and the most important factor is their free fatty acid content, which greatly affects

Accepted Answer

C: The suitability of coatings

Answer

A: The carriage pressure

Answer

B: The cargo pumping rate

Answer

D: The cargo tank atmosphere

Question 14

What is the effect of intermolecular forces on vapor pressure?

Accepted Answer

B: Relatively strong force will decrease vapor pressure

Answer

A: Relatively strong force will increase vapor pressure

Answer

C: Relatively weak force will decrease vapor pressure

Answer

D: Relatively weak force does not have any effect on vapor pressure

Question 15

Specific gravity is used by the American Petroleum Institute (API) to classify various

Accepted Answer

C: Weights of oil

Answer

A: Viscosities of oil

Answer

B: Vapor densities of oil

Answer

D: Volumes of oil

Question 16

Vegetable and animal oils may vary in composition. The most important factor is their

Accepted Answer

D: Free fatty acid content

Answer

A: Alkalinity content

Answer

B: Hydrocarbon content

Answer

C: Composition

Question 17

System in which both matter and energy can be exchanged with the surroundings is

Accepted Answer

A: Open system

Answer

B: Closed system

Answer

C: Surrounding

Answer

D: Isolated system

Question 18

Combustion of carbon is an example for

Accepted Answer

A: Exothermic reaction

Answer

B: Endothermic reaction

Answer

C: Reversible reaction

Answer

D: Irreversible reaction

Question 19

Sublimation is the transition of a substance directly from

Accepted Answer

D: Solid to the gas phase & Vice versa

Answer

A: Liquid to the gas phase & Vice versa

Answer

B: Solid to the Liquid phase & Vice versa

Answer

C: Gas to the super heated gas phase & Vice versa

Question 20

The change in the internal energy is represented as

Accepted Answer

A: ∆U

Answer

B: ∆H

Answer

C: ∆G

Answer

D: ∆T

Question 21

The quantitative relationship between pressure and solubility of the gas in solvent is known as

Accepted Answer

A: Henry's law

Answer

B: Poisous law

Answer

C: Michalis menten

Question 22

The process which separates a pure solid in the form of its crystals from a solution

Accepted Answer

A: Crystallisation

Answer

B: Sublimation

Answer

C: Chromatography

Question 23

Bottle A contains a dilute solution of vinegar and bottle B contains sodium carbonate solution, the colours seen in pH paper dipped in A and B are :

Accepted Answer

A: orange, blue

Answer

B: green, blue

Answer

C: blue, orange

Answer

D: orange, green

Question 24

Which process does not result in the formation of both carbon dioxide and water?

Accepted Answer

A: addition of a dilute acid to a carbonate

Answer

B: burning ethanol

Answer

C: burning methane

Answer

D: heating crystals of hydrated sodium carbonate

Question 25

In a volumetric experiment involving the addition of hydrochloric acid to 25.0 cm3 of aqueous sodium hydroxide it is necessary to determine when the reaction is just complete. Which piece of apparatus could be used to determine the end-point of the reaction

Accepted Answer

D: thermometer

Answer

A: balance

Answer

B: gas syringe

Answer

C: stop watch

Question 26

When there are four components present in the solution it is called _________

Accepted Answer

B: Quartnary

Answer

A: Ternary

Answer

C: Primary

Question 27

Which compound in a 1 mol/dm3 solution has the lowest pH value?

Accepted Answer

B: hydrogen chloride

Answer

A: ethanoic acid

Answer

C: sodium chloride

Answer

D: sodium hydroxide

Question 28

In a binary homogeneous solution the component present in a _____ amount is called a solute.

Accepted Answer

A: smaller

Answer

B: Larger

Answer

C: fixed

Answer

D: miscible

Question 29

The energy possesed by all the molecules or atoms is called

Accepted Answer

A: Internal energy

Answer

B: Enthalpy

Answer

C: Gibbs energy

Answer

D: Free energy

Question 30

Indicators used in acid-base titrations are

Accepted Answer

C: weak organic acids or weak organic bases

Answer

A: strong organic acids

Answer

B: strong organic bases

Answer

D: non electrolysis

Advanced Training for Chemical Tanker Cargo Operations (CHEMCO) (Set 14)

The minimum concentration of a vapor in air which can form an explosive mixture is called the

Questions in CHEMCO Set 14

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