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E-lfh FRCA Primary: Equipment & Monitoring - Primary FRCA Course Exam Prep Questions > Primary FRCA Course Equipment Exam Prep Questions > Flashcards

Primary FRCA Course Equipment Exam Prep Questions Flashcards

1
Q

Concerning cyrogenic liquid systems

Recommended on-site storage capacity is 4 days

A

False. 14 days

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2
Q

Concerning cyrogenic 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.

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3
Q

Concerning cyrogenic liquid systems

Pressure inside vacuum insulated evaporator is 4 Bar

A

False. 10.5 Bar

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4
Q

Concerning cyrogenic liquid systems

Heating of gaseous oxygen is required at the outlet

A

True. A heat exchanger is used

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5
Q

Concerning cyrogenic liquid systems

Cylinder back-up is required

A

True.

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6
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.

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7
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.

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8
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.

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9
Q

Concerning medical gas cylinders

Nitrous oxide cylinders contains liquid

A

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

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10
Q

Concerning medical gas cylinders

Size E oxygen cylinders contain 1800 litres

A

False. It contains 680 Litres of oxygen

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11
Q

Regarding piped gas supply

Pipes are made of aluminium alloy

A

False. They are made of copper

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12
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

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13
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.

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14
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

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15
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).

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16
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.

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17
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

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18
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

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19
Q

The emergency oxygen flush

Incorporates a pressure limiting valve to prevent barotrauma

A

False. There is no such valve.

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20
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

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21
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.

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22
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.

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23
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.

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24
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.

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25
Q

Regarding suction

Float controls are essential parts to protect the patient

A

False. Float controls are there to protect the system.

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26
Q

Flowmeters on the anaesthetic machine

Are constant pressure, variable orifice devices

A

True. This is the definition of a flowmeter.

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27
Q

Flowmeters on the anaesthetic machine

Readings are taken from the bottom of the bobbin

A

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

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28
Q

Flowmeters on the anaesthetic machine

Bobbins are universal for all medical gases

A

False. Bobbins are specific for each gas.

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29
Q

Flowmeters on the anaesthetic machine

The tube is a cylindrical shape

A

False. The flowmeter tube is a conical shape.

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30
Q

Flowmeters on the anaesthetic machine

The flow control knobs are colour coded

A

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

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31
Q

Regarding plenum vaporisers

Temperature compensation is not required

A

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

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32
Q

Regarding plenum vaporisers

The output is independent of the gas flow

A

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

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33
Q

Regarding plenum vaporisers

TEC 6 vaporiser is heated to 23.5 C

A

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

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34
Q

Regarding plenum vaporisers

Splitting ratio ensures better vaporisation

A

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

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35
Q

Regarding plenum vaporisers

Latent heat of vaporisation reduces agent concentration

A

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.

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36
Q

Concerning Soda Lime

Heat is produced in the process of its action

A

True. It is an exothermic reaction

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37
Q

Concerning Soda Lime

The largest component is sodium hydroxide

A

False. The largest component calcium hydroxide (80%)

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38
Q

Concerning Soda Lime

Usually presented as a powder

A

False. It is presented in granules

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39
Q

Concerning Soda Lime

May react with sevoflurane to produce carbon monoxide

A

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

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40
Q

Concerning Soda Lime

1 kg will absorb about 100 litres of CO2

A

False. 1 kg absorbs about 250 litres of CO2.

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41
Q

Regarding scavenging

Maximum recommended concentrations for Nitrous oxide in theatre are 100 ppm

A

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

42
Q

Regarding scavenging

It is attached to breathing systems with a 22mm connection

A

False. It is a 30 mm connector

43
Q

Regarding scavenging

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

A

True.

44
Q

Regarding scavenging

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

A

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.

45
Q

Regarding scavenging

Active systems and suction use the same vacuum supply

A

False. These are two separate systems.

46
Q

Regarding breathing systems

There is no Mapleson classification for a circle system

A

True. Mapleson classification only includes semi-open systems

47
Q

Regarding breathing systems

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

A

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

48
Q

Regarding breathing systems

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

A

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

49
Q

Regarding breathing systems

Mapleson E system can only be used with spontaneously breathing patients

A

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

50
Q

Regarding breathing systems

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

A

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.

51
Q

Concerning Nitrous Oxide cylinders

The amount of N2O can be calculated using Charles’s law

A

False. It does not apply

52
Q

Concerning Nitrous Oxide cylinders

The amount of N2O can be calculated using Boyle’s law

A

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

53
Q

Concerning Nitrous Oxide cylinders

The filling ration in the UK is 0.85

A

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

54
Q

Concerning Nitrous Oxide cylinders

The knowledge of molecular weight of N2O is required to calculate the remaining amount

A

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

55
Q

Concerning Nitrous Oxide cylinders

The size is determined by the cylinder weight when empty

A

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

56
Q

The Desflurane Tec 6 vaporiser

The vaporisation chamber is heated to a temperature of 23.5˚C

A

False. It is heated to 39˚C

57
Q

The Desflurane Tec 6 vaporiser

The vaporisation chamber is pressurised to approximately 200 kPa

A

True. 2 bar.

58
Q

The Desflurane Tec 6 vaporiser

Is an example of a variable bypass vaporiser

A

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.

59
Q

The Desflurane Tec 6 vaporiser

Fresh gas flow never goes through the vaporising chamber

A

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

60
Q

The Desflurane Tec 6 vaporiser

Incorporates a differential pressure transducer

A

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

61
Q

Regarding breathing system components

The standard adult reservoir bag size is 1 litre

A

False. 2 litres

62
Q

Regarding breathing system components

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

A

True.

63
Q

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

A

False.

64
Q

Regarding breathing system components

The pressure across an APL valve is limited to a maximum of 50 cm H2O

A

False. It is limited to 60 cm H2O.

65
Q

Regarding breathing system components

All connections except those for scavenging are 15 or 22mm

A

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

66
Q

The following are safety features of a modern anaesthetic workstation

Emergency oxygen flush

A

True.

67
Q

The following are safety features of a modern anaesthetic workstation

NIST connections

A

True.

68
Q

The following are safety features of a modern anaesthetic workstation

Colour coded pressure gauges

A

True.

69
Q

The following are safety features of a modern anaesthetic workstation

Ohmeda Link 25 system

A

True.

70
Q

The following are safety features of a modern anaesthetic workstation

Colour coded cylinder bodies

A

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

71
Q

Regarding the oxygen supply failure alarm

Activation is dependent solely on oxygen supply pressure

A

True.

72
Q

Regarding the oxygen supply failure alarm

It eliminates the possibility of anoxic gas mixtures

A

False.

73
Q

Regarding the oxygen supply failure alarm

It is coupled to a valve that interrupts the flow of anaesthetic gases

A

True.

74
Q

Regarding the oxygen supply failure alarm

It requires oxygen in the back-up cylinder as a power source

A

False.

75
Q

Regarding the oxygen supply failure alarm

Requires an electrical power source for its audible component

A

False.

76
Q

Concerning Vacuum Insulated Evapouriser

It contains only liquid oxygen

A

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

77
Q

Concerning Vacuum Insulated Evapouriser

The temperature inside is -119˚C

A

False. The temperature is -150 to -180

78
Q

Concerning Vacuum Insulated Evapouriser

The blow-off valve opens at 1000 kPa

A

False. It opens at 1500 kPa. 15 bar.

79
Q

Concerning Vacuum Insulated Evapouriser

The pressure inside is less than 100 kPa

A

False. It is 1000 kPa.

80
Q

Concerning Vacuum Insulated Evapouriser

Amount of oxygen inside is determined by pressure gauge

A

False. By weight.

81
Q

Concerning Mapleson D (Bain circuit)

Fresh gas flow is delivered via inner tube

A

True.

82
Q

Concerning Mapleson D (Bain circuit)

Is a type of T-piece system

A

True.

83
Q

Concerning Mapleson D (Bain circuit)

Is more efficient for controlled ventilation than spontaneous

A

True.

84
Q

Concerning Mapleson D (Bain circuit)

Could be used with low-flow anaesthesia

A

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

85
Q

Concerning Mapleson D (Bain circuit)

Better for controlled ventilation due to high resistance to breathing

A

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.

86
Q

In circle system

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

A

False.

87
Q

In circle system

Fresh gas flow cannot enter between patient and expiratory valve

A

True.

88
Q

In circle system

APL valve can be located between patient and inspiratory valve

A

False.

89
Q

In circle system

Soda lime is always essential for use

A

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

90
Q

In circle system

Scavenging is easier compared to Jackson Rees circuit

A

True.

91
Q

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

A

True.

92
Q

The variable bypass vaporisers currently available

Deviate the major part of the gas flow though a channel which bypasses the vaporising chamber

A

True.

93
Q

The variable bypass vaporisers currently available

Completely saturate the carrier gas passing through the vaporising chamber with anaesthetic vapour

A

True.

94
Q

The variable bypass vaporisers currently available

Have a comparatively high resistance to flow

A

True. compared to draw-over vaporisers. 2 kPa at 5 l/min of flow.

95
Q

The variable bypass vaporisers currently available

Have a temperature sensitive valve that reduces flow through the vaporiser when cooled

A

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

96
Q

Regarding anaesthetic machines

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

A

False.

97
Q

Regarding anaesthetic machines

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

A

True.

98
Q

Regarding anaesthetic machines

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

A

True.

99
Q

Regarding anaesthetic machines

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

A

True.

100
Q

Regarding anaesthetic machines

The AAGBI anaesthetic machine checklist includes checking the scavenging system

A

True.

E-lfh FRCA Primary: Equipment & Monitoring - Primary FRCA Course Exam Prep Questions (3 decks)

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