CHEMCO - Advanced Training for Chemical Tanker Cargo Operations Exit Exam Questions - Set 5

Question 1

The terminal indicates to you that they are going to use a booster pump to assist the discharging operation. You start the discharge and in a few minutes the pressure drops sharply. This could be a result of the ___________.

Accepted Answer

A: booster pump coming on the line and discharging properly

Answer

B: booster pump failing to start

Answer

C: ship's pump speeding up

Answer

D: booster pump being lined up in the wrong direction

Question 2

A restricted tank gauging system

Accepted Answer

B: Does not allow vapour to escape

Answer

A: Allows limited amounts of vapour to escape

Answer

C: Uses a float gauge

Answer

D: Does not use an ullage tape

Question 3

The lowest temperature at which the liquid remains a fluid is called the:

Accepted Answer

B: The pour point

Answer

A: The flow point

Answer

C: The melting point

Answer

D: The Liquefaction point

Question 4

Devices that release small amount of liquid or vapor while in use are known as ______ devices.

Accepted Answer

A: Restricted

Answer

B: detection

Answer

C: hydraulic

Question 5

An inert gas system installed on a tanker is designed to

Accepted Answer

D: lower the oxygen levels inside cargo tanks, making explosion nearly impossible

Answer

A: aid in the stripping and cleaning of cargo tanks

Answer

B: increase the rate of discharge of cargo

Answer

C: force toxic and explosive fumes from a cargo tank to vent to the outside atmosphere

Question 6

For the purposes of cargo oil containment, the fixed container under the manifold of an eight-inch loading line must hold a minimum of

Accepted Answer

A: three barrels

Answer

B: four barrels

Answer

C: six barrels

Answer

D: eight barrels

Question 7

What is the purpose of the relief valve of a cargo pump?

Accepted Answer

D: Permits the return of cargo to the suction side of the pump

Answer

A: Provides for the removal of vapors

Answer

B: Allows two or more tanks to be filled at the same time

Answer

C: Provides for the emergency shutdown of the pump

Question 8

Identify correct labelling for Tanker VEC

Accepted Answer

D: 1- P/V Valve; 2- Mast Riser; 3- P/V Breaker; 4 - Deck water seal

Answer

A: 1- P/V Valve; 2- P/V Breaker; 3- Mast Riser; 4 - Deck water seal

Answer

B: 1- P/V Valve; 2- P/V Breaker; 3- Deck water seal; 4- Mast Riser

Answer

C: 1- Mast Riser; 2- P/V Breaker; 3- P/V Valve; - Deck water seal

Question 9

A single fitting installed in a pipeline that either blanks off the pipe or allows a full flow passage of a liquid through the pipe is referred to as a _____.

Accepted Answer

D: spectacle flange

Answer

A: blind flange

Answer

B: pivot coupling

Answer

C: quick-release coupling

Question 10

Hydrocarbon gas normally encounted in petroleum tankers cannot burn in an atmosphere containing oxygen less than

Accepted Answer

B: 11%

Answer

A: 2%

Answer

C: 5%

Answer

D: 8%

Question 11

Who is responsible for ensuring instruments are sent ashore for calibration when required ?

Accepted Answer

D: The Chief Officer

Answer

A: The Company

Answer

B: The Master

Answer

C: The Safety Officer

Question 12

An on-board monitoring system, using level sensors permanently installed in each vessel compartment, will have a high level alarm set at not more than

Accepted Answer

B: 95% of compartment capacity

Answer

A: 90% of compartment capacity

Answer

C: 97% of compartment capacity

Answer

D: 99% of compartment capacity

Question 13

The volatility of a flammable liquid is indicated by its

Accepted Answer

B: flash point

Answer

A: ignition temperature

Answer

C: flammable range

Answer

D: conversion index

Question 14

Which action must be taken when an individual cargo tank is closed off from the inert gas system by the tank isolation valve?

Accepted Answer

C: The tank must be vented to the atmosphere.

Answer

A: The tank must be gas freed.

Answer

B: The tank must be ballasted.

Answer

D: The bypass valve must also be closed.

Question 15

The purpose of inert gas systems aboard tankers is to

Accepted Answer

B: prevent outside air from entering the tank

Answer

A: allow sufficient oxygen in the tank to sustain life

Answer

C: provide increase in cargo discharge pressure

Answer

D: comply with double hull pollution prevention regulations

Question 16

Before a tank is to be crude oil washed, the oxygen content in the tank must be measured at a position ________.

Accepted Answer

D: one meter from the deck

Answer

A: immediately above the level of the oil

Answer

B: at the top of the tank

Answer

C: in the vent riser

Question 17

The explosive range of petroleum vapors mixed with air is

Accepted Answer

B: 1% to 10%

Answer

A: 0% to 1%

Answer

C: 10% to 15%

Answer

D: 12% to 20%

Question 18

The (auto) ignition temperature is that temperature at which __________.

Accepted Answer

A: no spark or flame is required to ignite gas or vapor

Answer

B: a fuel begins to give off explosive vapors

Answer

C: a fuel if ignited will continue to burn

Answer

D: a 1% mixture of the fuel with air will explode

Question 19

In reference to accidental oil pollution, the most critical time during bunkering is when

Accepted Answer

B: hoses are being blown down

Answer

A: you first start to receive fuel hoses are being disconnected

Answer

C: final topping off is occurring

Answer

D: hoses are being disconnected

Question 20

Which characteristic is an advantage of a butterfly valve as compared to a gate valve?

Accepted Answer

B: Quick operation

Answer

A: Precise control over cargo flow

Answer

C: No resistance to cargo flow when open

Answer

D: Less maintenance required

Question 21

Which of the following is not an exception provided under MARPOL, Annex-1, regarding the discharge of oil or oily mixture into the sea?

Accepted Answer

D: Discharge resulting due to damage to the ship not because of Master's fault, but because of a third party's fault and action awaited by Master from that third party to prevent /minimize discharge

Answer

A: Discharge for the purpose of securing safety of a ship

Answer

B: Discharge for the purpose of saving life at sea

Answer

C: Discharge resulting due to damage to the ship because of Master's fault even if the Master/Owner of the ship has taken all reasonable precautions to prevent/minimize discharge

Question 22

While using a combustible gas indicator, if the hydrocarbon content of the atmosphere exceeds the U.E.L., the needle of the indicator will

Accepted Answer

D: move to the maximum reading and immediately return to zero

Answer

A: remain at zero without moving

Answer

B: move to the maximum reading and stay there

Answer

C: move halfway up the scale

Question 23

In the ‘flow through’ method of ballast water exchange:

Accepted Answer

B: Ballast equal to approximately three times the tank capacity must be pumped through the tank

Answer

A: Ballast equal to approximately two times the tank capacity must be pumped through the tank

Answer

C: Ballast equal to approximately four times the tank capacity must be pumped through the tank

Answer

D: Ballast equal to approximately five times the tank capacity must be pumped through the tank

Question 24

The preferred type of pollution control for oil spills on the water is(are)

Accepted Answer

B: booms

Answer

A: straw

Answer

C: skimmers

Answer

D: chemical dispersants

Question 25

Which operation may cause the pressure in an inert tank to fall below the prescribed limits?

Accepted Answer

B: Discharging

Answer

A: Loading

Answer

C: Crude oil washing

Answer

D: Steaming tanks

Question 26

The most likely location for a liquid cargo fire to occur on a tanker would be

Accepted Answer

D: in the pumproom

Answer

A: in the midships house

Answer

B: at the main deck manifold

Answer

C: at the vent header

Question 27

Identify the correct labeling, when the tanker has heeled to a small angle.

Accepted Answer

D: 1- Metacenter; 2- GZ- Righting Lever; 3-Center of Buoyancy; 4- Center of Gravity

Answer

A: 1- Metacenter; 2- GZ- Righting Lever; 3-Center of Gravity; 4- Center of Buoyancy

Answer

B: 1- Center of Gravity; 2- GZ- Righting Lever; 3-Center of Buoyancy; 4- Metacenter

Answer

C: 1- Metacenter; 2- GZ-Shift of Buoyancy; 3-Center of Buoyancy; 4- Center of Gravity

Question 28

Each ship having an inert gas system must have a portable instrument to measure concentrations of hydrocarbon vapor in inert atmospheres and also to measure

Accepted Answer

B: oxygen

Answer

A: nitrogen

Answer

C: carbon dioxide

Answer

D: carbon dioxide

Question 29

Working instructions specifying the manner in which the ship is to be loaded and ballasted to avoid unacceptable stresses in the vessel’s structure is required for tankers:

Accepted Answer

D: Greater than 150 meters in length

Answer

A: Greater than 50 metres in length

Answer

B: Greater than 75 meters in length

Answer

C: Greater than 100 meters in length

Question 30

A self-contained breathing apparatus is used to

Accepted Answer

C: enter areas that may contain dangerous fumes or lack oxygen

Answer

A: make underwater repairs to barges

Answer

B: determine if the air in a tank is safe for men

Answer

D: resuscitate an unconscious person

Advanced Training for Chemical Tanker Cargo Operations (CHEMCO) (Set 5)

The terminal indicates to you that they are going to use a booster pump to assist the discharging operation. You start the discharge and in a few minutes the pressure drops sharply. This could be a result of the ___________.

Questions in CHEMCO Set 5

Question Discussion & Notes

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