( Part 3 ) 100 MCQ for DHA & DOH Exams

 1- Which of the following is true about anesthesia machine ?

• Desflurane vaporizer is heated to 39 C

• Halothane vaporizer at 39 C

• Rotameter is a variable pressure flow meter and variable orifice device for gases only

• O2 sensor is attached to inspiratory limb at the machine end 

2- Which is the main component of sodalime in close circuit ?

• Sodium hydroxide 

• Barium hydroxide

• Calcium hydroxide

• Potassium hydroxide

3- True about rotameter :

• Rotameter reading may not affected by dirt inside the tube 

• Rotameter reading may not get affected by static electricity 

• The height to which bobbin rises indicates the flow rate 

• A rotameter is variable pressure flowmeter 

4- True about wrights spirometer is / are :

• Flow rates can be calculated 

• Gives false high values at low flow rates 

• Gives false low values at high flow rates 

• Used for calculation of expired volume 

• Reads bidirectional flow 

5- True about anesthesia breathing circuit is :

• Cylinder is a part of high pressure system

• O2 flush delivers < 35 liters

• O2 flush delivers > 35 liters

• Pipelines is a part low pressure system

6- All of the following are safety measures to prevent the delivery of hypoxic gas mixture to the patient except :

• Location of oxygen valve after the nitrous oxide valve

• Presence of a pin index system to prevent wrong attachment of the nitrous oxide and oxygen cylinders 

• Location of a fail-safe valve downstream from the nitrous oxide supply source 

7- Pin index system is a safety feature adopted in anesthesia machines to prevent: (AIIMS 03, DNB 08)

• Incorrect attachment of anesthesia machines.

• Incorrect attachment of anesthesia face masks.

• Incorrect inhalational agent delivery

• Incorrect gas cylinder attachment

8- The Pin index code of nitrous oxide is: (AIIMS 03, CMC 02)

• 2, 5

• 1, 5

• 3, 5

• 2, 6

9-  True statement regarding pin index: (PGI May 10, DNB 08)

• Pin is present on cylinder

• Pin is present on machine

• Not effective if wrong gas is filled in cylinder

• Pin index of air is 2, 5

•  Hole positions on cylinder valves

10- Gas which is filled as liquid in cylinder is: (PGI Dec 07)

• O2

• CO2

• N2O

• Cyclopropane

• Halothane

11- An anaesthetist orders a new attendant to bring the oxygen cylinder. He will ask the attendant to identify the correct cylinder by following color code: (AI 03, DNB 08)

• Black cylinders with white shoulders

• Black cylinders with grey shoulders

• White cylinders with black shoulders

• Grey cylinder with white shoulders

12- True about N2O cylinder: (PGI June 04, DNB 05)

• Pressure is 2200 psig

• Blue in color

• Gas in liquid form

• Pin index 3.5

• It is flammable

13- Use of intra-arterial cannula in major surgery is are:

• Measurement of direct intra-arterial BP (PGI 2005)

• Sample for ABG

• Drug injection

• BT

14- All statements are true about gas cylinders except:

• Pressure of N2O is 745 psig at 20°C

• Higher pressure indicates impurity in N2O (DNB 01)

• N2O is in liquid form

• Emergency oxygen ‘E’ cylinder has more gas than ‘H’ cylinder

15- Regarding critical temperature which of following is true:

• TC of O2 is – 119°C

• TC of N2 is – 119°C

• TC of N2O is 36.5°C

• TC of N2O is 36.5°C

• TC of air is - 140.6°C

ANSWERS :

1- a                2- c                        3- c                    4- a and d             5- a and c              

6- a                7- d                        8- c                   9- b and c             10- b, c and d       

11- a              12- b ,c and d       13- a and b     14- a and d          15- a , d and e

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