Haz Chem 1.1 - Liquid Nitrogen

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Haz Chem 1.1 - Liquid Nitrogen - REFILL PLV F10

Quiz for module Haz Chem 1.1 - Liquid Nitrogen - REFILL PLV F10 (HC_1.1_v2)

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Name *

zID *

Module Document Declaration

This module is based on the following documents which you must have read, and declared as read, and the following videos which you must declare as viewed:

SCI-CHEMSCI-SWP-2072 - Refilling PLV and Dewars from the F10 BSV
SCI-CHEMSCI-RMF-1786 - Refilling PLV and Dewars F10 BSV

PLEASE NOTE:
-> The declaration statement has no bearing on your quiz score.
-> If you have declared the documents as read during a previous quiz attempt, you do not need to declare them as read again.
-> If you have passed the quiz previously but not declared the documents as read, you may declare them as read at any time but you do not need to pass the quiz again.

I declare...

… that I have read the following required documents, and viewed the following required videos (if applicable) for this module and will comply with the instructions and procedures contained within them. (Select all that apply)

SCI-CHEMSCI-SWP-2072

SCI-CHEMSCI-RMF-1786

Module Quiz

A Portable Liquid Vessel (PLV) has the following characteristics: (select all that apply) *

Stainless steel cylinder with an inner stainless steel vessel separated by an insulating vacuum void

Used to store and transport liquid gases as low as -196 C and up to 300 psi

Used to store and transport liquid gases as low as -196 C but not under pressure (loose fitting caps)

Two flasks, one within the other with a partially evacuated gap between the two

Larger capacity (up to about 240 L)

Smaller capacity (up to about 50 L)

Required

A dewar has the following characteristics: (select all that apply) *

Used to store and transport liquid gases as low as -196 C but not under pressure (loose fitting caps)

Larger capacity (up to about 240 L)

Two flasks, one within the other with a partially evacuated gap between the two

Stainless steel cylinder with an inner stainless steel vessel separated by an insulating vacuum void

Smaller capacity (up to about 50 L)

Used to store and transport liquid gases as low as -196 C and up to 300 psi

Required

How many people are required to transport a PLV? *

Which of the following is true when transporting PLVs and dewars: (select all that apply) *

You should use a lift key to put the lift into dangerous goods mode (to prevent potential lift users from accessing the lift)

You should use signage on the PLVs and dewars to warn potential lift users not to enter the lift

You should move quickly to minimise downtime

You can travel in the lift with PLVs and dewars if they are empty

You should never travel in a lift with any PLV or dewar, even if you think it’s empty

You should travel in the lift with the PLVs and dewars so you can warn others of potential asphyxiation hazards

Required

Which of the following must be worn when filling a 25 or 50 L dewar from the large 180 L PLV: (select all that apply) *

Lab coat fully fastened

Long trousers over the tops of shoes

A full-face shield or goggles (safety glasses are not sufficient to protect against splashes)

Gloves suitable for handling cryogens worn INSIDE the sleeves of a fastened lab coat

Covered, non-permeable footwear (use shoe covers provided if required)

Required

Which of the following must be worn when filling a large 180 L PLV from the bulk storage vessel (BSV): (select all that apply) *

Covered, non-permeable footwear (use shoe covers provided if required)

Long trousers over the tops of shoes

A full-face shield or goggles (safety glasses are not sufficient to protect against splashes)

Lab coat fully fastened

Gloves suitable for handling cryogens worn INSIDE the sleeves of a fastened lab coat

Hearing protection (ear muffs or ear plugs)

Required

True or false – you can leave the PLV unattended while filling it from the BSV. *

True

False

True or false – you must use bollards and plastic bunting to create a 5 m exclusion zone around the PLV when refilling from the BSV. *

True

False

The following items are available in the storage box at the BSV. (Select all that apply) *

Lip balm

Face shield

Hearing protection

Spanners

Leather gloves

Bucket for water to de-ice the valves

Cryogenic gloves

Safety glasses

Required

Liquid nitrogen transfer involving the BSV should only be carried out in: (select all that apply) *

Dry clothing

Wet weather

Dry weather

Wet clothing

Required

True or false – you should remove the flexible hose from the PLV before transporting it to the loading dock for filling. *

True

False

Before filling the PLV, you should check it to ensure: (select all that apply) *

Control valves, pressure relief devices and gauges are not damaged, broken, corroded or blocked.

External surfaces are free from damage, corrosion or "cold spots".

The PLV is correctly labelled.

Required

True or false – before filling you should remove any residual pressure on the PLV by opening the VENT valve. *

True

False

The flexible hosing from the BSV should be connected to which valve on the PLV? *

LIQUID

PRESSURE BUILDER

VENT

True or false – frost forming on the outside of the PLV may indicate a problem with the dewar and should be reported to the lab manager. *

True

False

After closing the BSV filling valve C and the LIQUID valve on the PLV, the first thing you should do IMMEDIATELY is: *

Unscrew the transfer hose from the PLV and store it appropriately

Use the bucket to pour water onto the flexible hose line connection to remove ice build-up

Open the BSV VENT valve to release pressure in the flexible hose line

True or false – if you do not open the BSV VENT valve to release pressure in the flexible hose line it may rupture and explode violently. *

True

False

Which transfer hose is used to transfer liquid nitrogen between the BSV and small portable dewars? *

The same transfer hose that is used to fill PLVs

A different flexible hose with a diffuser fitted to the end

True or false – you are required to attend hands-on training by qualified trainer prior to filling PLVs. *

True

False

If at any time you are unsure of the procedure to follow, you should: *

Keep it a secret so as not to be embarrassed

Ask the Chemistry Store staff for assistance

Walk away and hope someone else will take care of things

Carry on with what you hope might be the correct procedure

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