Primary FRCA Course Equipment Exam Prep Questions Flashcards by Alex Kinsky

Q

Concerning cryogenic liquid systems

Recommended on-site storage capacity is 4 days

A

False. 14 days

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

Concerning cryogenic liquid systems

One volume of liquid oxygen gives 130 times its volume of gas

A

False. 842 times its volume. 130 is the figure for a J size oxygen cylinder.

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

Concerning cyrogenic liquid systems

Pressure inside vacuum insulated evaporator is 4 Bar

A

False. 10.5 Bar

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

Concerning cyrogenic liquid systems

Heating of gaseous oxygen is required at the outlet

A

True. A heat exchanger is used

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

Concerning cryogenic liquid systems

Cylinder back-up is required

A

True.

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

Concerning medical gas cylinders

Titanium is most often used for making cylinders

A

False. Modern cylinders are made from Molybdenum steel, high-carbon manganese steel or light-weigh steel aluminium composite.

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

Concerning medical gas cylinders

In the UK oxygen cylinders are colour coded as blue

A

False. In the UK oxygen cylinders are colour coded as white. Colour coding only refers to the shoulder of the cylinder.

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

Concerning medical gas cylinders

Gauge pressure in a full molybdenum steel oxygen cylinder should read 137 Bar

A

True. This is true for traditional molybdenum steel cylinders. However, its’ 230 Bar or 300 Bar in lightweight steel aluminium composite cylinders.

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

Concerning medical gas cylinders

Nitrous oxide cylinders contains liquid

A

True. Up to 95% of Nitrous Oxide in cylinder is in liquid state.

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

Concerning medical gas cylinders

Size E oxygen cylinders contain 1800 litres

A

False. It contains 680 Litres of oxygen

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

Regarding piped gas supply

Pipes are made of aluminium alloy

A

False. They are made of copper

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

Regarding piped gas supply

Pressure in medical air pipe is 7 Bar

A

False. It is 4 Bar for Medical Air and 7 Bar for Surgical Air

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

Regarding piped gas supply

Schrader sockets and probes are used on the back of the anaesthetic machine to prevent inadvertent misconnection of gas supply

A

False. Schrader sockets and probes are used to connect to terminal outlets for medical gases. NIST is used to connect to anaesthetic machines.

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

Regarding piped gas supply

Schrader probes are of different size for different gases

A

False. No, they are the same but Schrader sockets are unique for each gas

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

Regarding piped gas supply

Pressure in oxygen pipe is the same as in nitrous oxide pipe

A

True. Pressure in all gas pipes is 4 Bar apart from Surgical Air (7 Bar).

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

The emergency oxygen flush

Bypasses the flowmeter block

A

True. Emergency oxygen feeds into the system just before common gas outlet hence bypasses flowmeter block.

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

The emergency oxygen flush

Should provide a flow of at least 20 litres/min

A

False. It should provide at least 35 L/min to match inspiratory flow rate

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

The emergency oxygen flush

It should be possible to lock it in the on position

A

False. There is no locking facility to prevent barotrauma

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

The emergency oxygen flush

Incorporates a pressure limiting valve to prevent barotrauma

A

False. There is no such valve.

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

The emergency oxygen flush

Use may lead to awareness

A

True. Yes, especially in case of inhalational anaesthesia as it will dilute anaesthetic agent concentration delivered to a patient

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

Regarding suction

Can be generated using Venturi system

A

True. Yes, but it requires about 20 L/min of oxygen hence it’s wasteful and rarely used.

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

Regarding suction

Should be able to generate unrestricted flow greater than 40 l/min

A

False. 25 L/min is a required displacement capacity of suction system.

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

Regarding suction

Should be able to generate negative pressure of more than 500 mmHg in 10 seconds

A

True. This is how one checks the performance of the suction system simply by kinking the tubing and observing the pressure gauge.

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

Regarding suction

Tubing should be of low resistance but high compliance

A

False. Both resistance and compliance should be low to prevent collapsing under negative pressure.

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Regarding suction Float controls are essential parts to protect the patient

False. Float controls are there to protect the system.

Flowmeters on the anaesthetic machine Are constant pressure, variable orifice devices

True. This is the definition of a flowmeter.

Flowmeters on the anaesthetic machine Readings are taken from the bottom of the bobbin

False. Readings are taken from the top of the bobbin.

Flowmeters on the anaesthetic machine Bobbins are universal for all medical gases

False. Bobbins are specific for each gas.

Flowmeters on the anaesthetic machine The tube is a cylindrical shape

False. The flowmeter tube is a conical shape.

Flowmeters on the anaesthetic machine The flow control knobs are colour coded

True. The flow control knobs are colour coded for specific gases.

Regarding plenum vaporisers Temperature compensation is not required

False. Temperature compensation is a feature of all plenum vaporisers and is achieved mainly by large metal capacity and bimetallic strips.

Regarding plenum vaporisers The output is independent of the gas flow

False. The output is calibrated only between 0.5 and 15 L/min.

Regarding plenum vaporisers TEC 6 vaporiser is heated to 23.5 C

False. TEC 6 is heated to 39C. 23.5C is boiling temperature of Desflurane.

Regarding plenum vaporisers Splitting ratio ensures better vaporisation

False. Splitting ratio ensures saturation of fresh gas flow with anaesthetic vapour.

Regarding plenum vaporisers Latent heat of vaporisation reduces agent concentration

True. This is true based on a fact that when any substance changes from liquid to vapour (or solid to liquid), heat must be supplied despite change of state taking place at constant temp. When liquid vaporises its temperature falls therefore compensation required otherwise SVP falls and delivered concentration falls.

Concerning Soda Lime Heat is produced in the process of its action

True. It is an exothermic reaction

Concerning Soda Lime The largest component is sodium hydroxide

False. The largest component calcium hydroxide (80%)

Concerning Soda Lime Usually presented as a powder

False. It is presented in granules

Concerning Soda Lime May react with sevoflurane to produce carbon monoxide

False. This happens with Desflurane during prolonged use of low flow. Sevoflurane at low flows may lead to a build up of compound A.

Concerning Soda Lime 1 kg will absorb about 100 litres of CO2

False. 1 kg absorbs about 250 litres of CO2.

Regarding scavenging Maximum recommended concentrations for Nitrous oxide in theatre are 100 ppm

True. According to Pollution - COSSH 1996 guidelines UK: N2O 100 ppm

Regarding scavenging It is attached to breathing systems with a 22mm connection

False. It is a 30 mm connector

Regarding scavenging Pressure relief valves are incorporated in passive systems to maintain pressure within the -50 to 1000 Pa range

True.

Regarding scavenging Active scavenging systems incorporate a reservoir that is open to the atmosphere

True. Components of active scavenging system include Collection, Transfer, Receiving, and Disposal. Receiving part is represented by a reservoir with positive and negative pressure relief valves.

Regarding scavenging Active systems and suction use the same vacuum supply

False. These are two separate systems.

Regarding breathing systems There is no Mapleson classification for a circle system

True. Mapleson classification only includes semi-open systems

Regarding breathing systems The circle system has the lowest minimum fresh gas flow requirement of all commonly used systems

True. This is one of the main advantages of using circle system

Regarding breathing systems During spontaneous ventilation, Mapleson D and E systems have the same minimum fresh gas flow requirement to prevent rebreathing

True. Mapleson D and E systems both require high flow rate during spontaneous ventilation to prevent re-breathing.

Regarding breathing systems Mapleson E system can only be used with spontaneously breathing patients

False. This is not true as one a thumb to occlude the system and provide inspiration. Releasing a thumb will ensure expiration.

Regarding breathing systems The Mapleson A system functions as a T-piece if the bag is removed

False. Mapleson A differs from T-piece in the way that fresh gas flow is not delivered at the patient's end, hence it does not function as T-piece.

Concerning Nitrous Oxide cylinders The amount of N2O can be calculated using Charles's law

False. It does not apply

Concerning Nitrous Oxide cylinders The amount of N2O can be calculated using Boyle's law

False. Boyle's law is used to calculate the content of a cylinder containing gas only as N2O is a mixture of liquid and gas in a cylinder

Concerning Nitrous Oxide cylinders The filling ration in the UK is 0.85

False. It is 0.75 in the UK and 0.67 in hotter climates

Concerning Nitrous Oxide cylinders The knowledge of molecular weight of N2O is required to calculate the remaining amount

True. MW of N2O (44) is required as well as Avogadro's number (22.4), cylinder's weight and cylinder's weight when empty.

Concerning Nitrous Oxide cylinders The size is determined by the cylinder weight when empty

False. The size is determined by the water capacity of the cylinder

The Desflurane Tec 6 vaporiser The vaporisation chamber is heated to a temperature of 23.5˚C

False. It is heated to 39˚C

The Desflurane Tec 6 vaporiser The vaporisation chamber is pressurised to approximately 200 kPa

True. 2 bar.

The Desflurane Tec 6 vaporiser Is an example of a variable bypass vaporiser

False. It is different from ordinary TEC vaporizers to provide very accurate electronically controlled gas injection of Desflurane into carrier gas. It is called measure flow vaporiser.

The Desflurane Tec 6 vaporiser Fresh gas flow never goes through the vaporising chamber

True. The vaporising chamber is completely sealed so FGF joins the gas flow from the chamber near the outlet of the vaporiser

The Desflurane Tec 6 vaporiser Incorporates a differential pressure transducer

True. This is one of it's integral features.

Regarding breathing system components The standard adult reservoir bag size is 1 litre

False. 2 litres

Regarding breathing system components Reservoir bags limit the pressure within the breathing system to 40 cm H2O

True.

Regarding breathing system components When fully open, the adjustable pressure limiting (APL) valve requires a pressure of 2-5 cm H2O to allow exhalation of gasses

False.

Regarding breathing system components The pressure across an APL valve is limited to a maximum of 50 cm H2O

False. It is limited to 60 cm H2O.

Regarding breathing system components All connections except those for scavenging are 15 or 22mm

True. The only different size connector is of scavenging tune that is 30 cm H2O

The following are safety features of a modern anaesthetic workstation Emergency oxygen flush

True.

The following are safety features of a modern anaesthetic workstation NIST connections

True.

The following are safety features of a modern anaesthetic workstation Colour coded pressure gauges

True.

The following are safety features of a modern anaesthetic workstation Ohmeda Link 25 system

True. This system prevents the output gas being hypoxic when using N2O.

The following are safety features of a modern anaesthetic workstation Colour coded cylinder bodies

False. It is the shoulders of the cylinder that are colour coded.

Regarding the oxygen supply failure alarm Activation is dependent solely on oxygen supply pressure

True.

Regarding the oxygen supply failure alarm It eliminates the possibility of anoxic gas mixtures

False.

Regarding the oxygen supply failure alarm It is coupled to a valve that interrupts the flow of anaesthetic gases

True.

Regarding the oxygen supply failure alarm It requires oxygen in the back-up cylinder as a power source

False.

Regarding the oxygen supply failure alarm Requires an electrical power source for its audible component

False.

Concerning Vacuum Insulated Evapouriser It contains only liquid oxygen

False. It is a mixture of liquid oxygen with gas on top

Concerning Vacuum Insulated Evapouriser The temperature inside is -119˚C

False. The temperature is -150 to -180

Concerning Vacuum Insulated Evapouriser The blow-off valve opens at 1000 kPa

False. It opens at 1500 kPa. 15 bar.

Concerning Vacuum Insulated Evapouriser The pressure inside is less than 100 kPa

False. It is 1000 kPa.

Concerning Vacuum Insulated Evapouriser Amount of oxygen inside is determined by pressure gauge

False. By weight.

Concerning Mapleson D (Bain circuit) Fresh gas flow is delivered via inner tube

True.

Concerning Mapleson D (Bain circuit) Is a type of T-piece system

True.

Concerning Mapleson D (Bain circuit) Is more efficient for controlled ventilation than spontaneous

True.

Concerning Mapleson D (Bain circuit) Could be used with low-flow anaesthesia

False. it relies on a high flow to prevent CO2 rebreathing.

Concerning Mapleson D (Bain circuit) Better for controlled ventilation due to high resistance to breathing

False. It is due to the fact that exhaled dead space gas goes into the bag and is rebreathed but exhaled alveolar gas vents through the APL valve.

In circle system A unidirectional valve must be located between patient and reservoir bag only on the expiratory limb

False.

In circle system Fresh gas flow cannot enter between patient and expiratory valve

True.

In circle system APL valve can be located between patient and inspiratory valve

False.

In circle system Soda lime is always essential for use

False. if exhausted high flows can still be used and will effectively work as a semi-open system

In circle system Scavenging is easier compared to Jackson Rees circuit

True.

The variable bypass vaporisers currently available Are based on the principle of dilution of the vapour produced in the vaporising chamber by a bypass gas stream

True.

The variable bypass vaporisers currently available Deviate the major part of the gas flow though a channel which bypasses the vaporising chamber

True.

The variable bypass vaporisers currently available Completely saturate the carrier gas passing through the vaporising chamber with anaesthetic vapour

True.

The variable bypass vaporisers currently available Have a comparatively high resistance to flow

True. Compared to draw-over vaporisers. 2 kPa at 5 L/min of flow.

The variable bypass vaporisers currently available Have a temperature sensitive valve that reduces flow through the vaporiser when cooled

False. It has bimetallic strip which increases flow when cooled.

Regarding anaesthetic machines It is recommended that vaporisers be removed from the machine prior to filling them

False.

Regarding anaesthetic machines Tilting vaporisers can result in a delivery of a dangerously high concentration of vapour

True.

Regarding anaesthetic machines The oxygen failure alarm should be checked weekly by disconnection of the oxygen hose

True.

Regarding anaesthetic machines The anti-hypoxia device should ensure that when nitrous oxide is used at least 25% oxygen also flows

True.

Regarding anaesthetic machines The AAGBI anaesthetic machine checklist includes checking the scavenging system

True.