CHEMCO - Advanced Training for Chemical Tanker Cargo Operations Exit Exam Questions - Set 6

Question 1

A combustible gas indicator will operate correctly ONLY when the

Accepted Answer

A: hydrocarbon content of the atmosphere is less than the U.E.L.

Answer

B: atmosphere is deficient in oxygen

Answer

C: compartment to be tested is free of CO2

Question 2

Part A of the the ISGOTT Ship/Shore Safety Check-List provides operational procedures for:

Accepted Answer

A: Transfer of bulk liquids, physical checks

Answer

B: Transfer of bulk liquids – elements to be verified verbally

Answer

C: Additional considerations for Bulk Liquid Chemicals

Answer

D: Additional considerations for Bulk Liquefied Gases

Question 3

The approval period for a shipboard Oil Pollution Emergency Plan expires after

Accepted Answer

D: five years

Answer

A: two years

Answer

B: three years

Answer

C: four years

Question 4

Which of the listed functions is the purpose of a gas scrubber in an inert gas generation system?

Accepted Answer

A: Cools the inert gas.

Answer

B: Maintains the oxygen content at 5% by volume.

Answer

C: Bleeds off static electricity in the inert gas.

Answer

D: Maintains flow to the water seal on the gas main.

Question 5

With an increase in temperature the volume of flammable and combustible liquids____.

Accepted Answer

A: expands

Answer

B: contracts

Answer

C: remains constant

Answer

D: remains constant if pressure remains constant

Question 6

The standard unit of liquid volume used in the petroleum industry, as well as the tanker industry, is a __________.

Accepted Answer

A: barrel

Answer

B: drum

Answer

C: gallon

Answer

D: liter

Question 7

Combustible gas indicators operate by drawing an air sample into the instrument

Accepted Answer

A: over an electrically heated platinum filament

Answer

B: where it is mixed with nitrogen

Answer

C: where it is ignited by a sparking device

Answer

D: where its specific gravity is measured

Question 8

As required by Reg.31 of Annex 1 of Marpol the ODMCS should be provided with a recording device for _________ recording the discharge in litres per nautical mile and total quantity discharged. This discharge should be kept onboard at least for a period of _________

Accepted Answer

B: Continuous, 1 year

Answer

A: Intermittent, 1 year

Answer

C: Intermittent, 3 years

Answer

D: Continuous, 3 years

Question 9

Which is the most accurate instrument for measuring the amount of oxygen in the atmosphere of a confined space?

Accepted Answer

B: Oxygen indicator

Answer

A: Combustible gas indicator

Answer

C: Flame safety lamp

Question 10

After each reading of an oxygen indicator, the instrument should be purged with

Accepted Answer

B: fresh air

Answer

A: CO2

Answer

C: the tested compartment's air

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D: water

Question 11

The maneuvering vessel normally berths on which side during STS operations ?

Accepted Answer

B: Port side to

Answer

A: Any side to

Answer

C: Starboard side to

Answer

D: As instructed by the mother vessel

Question 12

When the cofferdam to be purged to check the leakage and remove the leaked oil?

Accepted Answer

B: Before starting the cargo operation and after the cargo operation is completed

Answer

A: Before starting the cargo operation

Answer

C: During the cargo operation

Answer

D: After the cargo operation is completed

Question 13

How the Framo pump has almost eliminated cavitation for free flowing liquids?

Accepted Answer

D: Since the suction pipe is eliminated, cavitation is also eliminated for liquids with free flow

Answer

A: Volute casing is designed in such a way, that its smoothness avoids cavitation

Answer

B: The backwards curved vanes eliminate the cavitation

Answer

C: The hydrofoil design of the curved vanes, eliminate cavitation

Question 14

State if the following is True or False? After fixing the snap on hydraulic couplings of portable Framo, secure it with locking ring—only then the arrangement is safe.

Accepted Answer

A: true

Answer

B: false

Question 15

Select the correct statement.

Accepted Answer

B: Dynamic pressure is a function of the fluid velocity and its density.

Answer

A: Pressure type vacuum valves can prevent Backflow.

Answer

C: The water reservoir of a self-priming pump may be at the back of the impeller.

Answer

D: Stripping pumps are not of the self-priming type.

Question 16

How portable pumps are used?

Accepted Answer

D: When main pump is not working, the portable pump is used to transfer the cargo from this tank to another empty tank, where the main pump is working

Answer

A: Potable pumps are used in parallel with the main Framo pump to discharge the tank in a short time

Answer

B: When main pump is not working, portable pumps are used to discharge the liquid cargo to the terminal

Answer

C: Potable pumps are used in series with the main Framo pump to discharge the tank with large pressure.

Answer

E: When main pump is not working, the portable pump is used to transfer the cargo from this tank to another tank, having the same cargo, where the main pump is working

Question 17

Why a two way valve is provided in the air or inert gas line provided to check the leakage of oil in the cofferdam?

Accepted Answer

C: One is for the normally closed position, the other is for checking the leakage of cargo oil in the pump side and the third one is for checking the leakage of hydraulic oil in the motor side

Answer

A: One is for the normally closed position and the other is for checking the leakage of hydraulic oil in the motor side

Answer

B: One is for the normally closed position and the other is for checking the leakage of cargo oil in the pump side

Answer

D: One is for the normally closed position, the other is for checking the leakage of cargo oil in the pump side and the third one is for checking the leakage of hydraulic oil in the motor side

Question 18

How vacuum drain is done in Framo pumps?

Accepted Answer

A: Pump has a different vacuum line which is connected to the cargo tank well; vacuum pump is used to suck the oil out to make the well dry

Answer

B: Vacuum is created in the stripping line to pump the cargo out to make the well dry

Answer

C: Vvacuum drain is used to check leakage in pump’s cofferdam acuum drain is part of the pump casing

Question 19

Why the cargo pump in the Framo cannot be overloaded?

Accepted Answer

B: The pressure of hydraulic oil to the motor driving the cargo pump is designed in such a way that, the pump runs at the optimum speed

Answer

A: The pressure of hydraulic oil to the motor driving the cargo pump is designed in such a way that, the flow is always kept constant

Answer

C: The pressure of hydraulic oil to the motor driving the cargo pump is designed in such a way that, when the pump over speeds, the flow of oil is reduced

Answer

D: The pressure of hydraulic oil to the motor driving the cargo pump is designed in such a way that, the pressure can run the pump at 75% of the capacity

Question 20

Normally how much hydraulic oil is required to run the Framo portable pump?

Accepted Answer

C: 140 litres per min

Answer

A: 360 litres per min

Answer

B: 250 litres per min

Answer

D: 90 litres per min

Question 21

Select the correct point regarding the operation of the portable pumps?

Accepted Answer

D: Ensure that only the lower half of the pump is submerged and is lowered as the cargo level falls.

Answer

A: Before using portable pump, rig the pump on the deck and while pumping, lower the hose in the tank

Answer

B: When the liquid cargo level goes down, lower the hose accordingly, keeping the rigged pump on the deck

Answer

C: Make sure that the portable pump is completely submerged and lowered till the bottom of the tank and then start the pumping operation

Question 22

What is the pressure of the hydraulic oil in the return side after running the hydraulic motor?

Accepted Answer

A: Around 3 Bar

Answer

B: Around 10 bar

Answer

C: Around 15 bar

Answer

D: Above 15 bar

Question 23

Normally what is the discharge capacity of Framo portable pumps?

Accepted Answer

C: 70 cubic meter per hour

Answer

A: 150 cubic meter per hour

Answer

B: 100 cubic meter per hour

Answer

D: 200 cubic meter per hour

Question 24

In a centrifugal pump:

Accepted Answer

C: The fluid moves in the same direction as the impeller.

Answer

A: The discharge side has a negative pressure.

Answer

B: The fluid moves in a direction opposite to the impeller.

Answer

D: The width of the discharge pipeline decreases outwards.

Question 25

How purging and seal monitoring is done?

Accepted Answer

B: Air or inert gas pipe connected to the line, the two way valve is moved to hydraulic oil side and air or inert gas is opened and if there is any leak, it is purged out and the quantity is measured, then the two way valve is moved to the cargo oil side and the air or inert gas is opened and if there is any leak, it is purged out and the quantity is measured

Answer

A: Air or inert gas pipe connected to the line, the two way valve which remains closed is moved to hydraulic oil side and air or inert gas is opened and if there is any leak, it is purged out and the quantity is measured.

Answer

C: Air or inert gas pipe connected to the line, the two way valve is moved to cargo oil side and air or inert gas is opened and if there is any leak, it is purged out and the quantity is measured.

Question 26

Where is cofferdam in Framo pumps?

Accepted Answer

C: On both pump and motor side of the seal

Answer

A: On the cargo pump side of the seal

Answer

B: On the hydraulic motor side of the seal

Answer

D: Not on the pump end or the motor end

Question 27

Bernoulli’s principle states that:

Accepted Answer

C: pressure (P) x velocity (V) is a constant

Answer

A: pressure (P) x height (H) is a constant

Answer

B: height (H) x velocity (V) is a constant

Answer

D: pressure (P) x density (D) is a constant

Question 28

How the speed of the portable pump can be varied?

Accepted Answer

D: The portable pump is always rigged with its own flow control valve which is used for speed variation

Answer

A: Portable pump speed cannot be varied

Answer

B: Using the flow control valve of the main cargo pump

Answer

C: By varying the speed of the feed pump

Question 29

What kind of pumps can move extremely thick fluids like sludge without clogging ?

Accepted Answer

D: Screw pumps

Answer

A: Rotary vane pumps

Answer

B: Reciprocating pumps

Answer

C: Deep well pumps

Question 30

What is the pressure of the hydraulic oil in the inlet side for running the hydraulic motor?

Accepted Answer

B: Around 170 bar

Answer

A: Around 50 Bar

Answer

C: Around 100 bar

Answer

D: Around 25 bar

Advanced Training for Chemical Tanker Cargo Operations (CHEMCO) (Set 6)

A combustible gas indicator will operate correctly ONLY when the

Questions in CHEMCO Set 6

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