Pre-reg Q&As: September exam practice paper

1

Multiple completion

Directions:  For the question below, ONE or MORE of the responses is (are) correct. Decide which of the responses is (are) correct. Then choose:
A if 1, 2 and 3 are correct
B if 1 and 2 only are correct
C if 2 and 3 only are correct
D if 1 only is correct
E if 3 only is correct

Which of the following has/have been shown to be effective as a mosquito repellent?

1. N,N-diethyl-m-toluamide

2. Thiamine

3. High frequency sound devices

Answer

2

Multiple completion

Directions:  See above.

Which of the following terms should not be used to describe an isotonic sterile solution of sodium chloride for intravenous infusion?

1.    Normal saline

2.    Physiological saline

3.    Sodium chloride intravenous infusion 0.9 per cent
 

Answer

3

Simple completion calculation

You are required to prepare 5 litres of an aqueous solution of chlorhexidine gluconate which when diluted 1 in 10 produces a 1 in 1000 solution, to be prepared from an aqueous stock solution of chlorhexidine gluconate 20 per cent. What is the correct formula for this preparation?

A.    Chlorhexidine gluconate 20 per cent solution 50ml, water to 5 litres

B.    Chlorhexidine gluconate 20 per cent solution 100ml, water to 5 litre

C.    Chlorhexidine gluconate 20 per cent solution 250ml, water to 5 litres

D.    Chlorhexidine gluconate 20 per cent solution 500ml, water to 5 litres

E.    Chlorhexidine gluconate 20 per cent solution 1 litre, water to 5 litres

Answer

4

Assertion/Reason

Directions: The question below consists of a statement in the left hand column followed by a second statement in the right hand column.
Decide whether the first statement is true or false.
Decide whether the second statement is true or false.
Then choose:
A.         If both statements are true and the second statement is a correct      explanation of the first statement.
B.        If both statements are true but the second statement is not a correct            explanation of the first statement.
C.        If the first statement is true but the second statement is false.
D.        If the first statement is false but the second statement is true.
E.         If both statements are false.

Answer

________________________________________

Answers

1: D
 
Rationale

1. is DEET, which is recommended as a mosquito repellent in the BNF.  2. (vitamin B1) and 3. have been shown to be ineffective.

2: D
 
Rationale

The BNF in section 9.2.2.1states that the term ‘normal saline' should not be used. 

3: C
 
Calculation

Concentration of final solution = 1 in 1000, after being diluted 1 in 10
Therefore, prepared solution   = 1 in 1000 x 10 = 1 in 100 = 1 per cent
Therefore, dilution of stock solution = 1 in 20 = 1/20 x 5000 ml = 250ml
Therefore, formula is:  Chlorhexidine gluconate 20 per cent solution 250ml, water to 5 litres

4: C
 
Calculation

Calculation/rationale:
Recommended dose of Niferex (BNF, section 9.1.1.1) = 1 drop per 450g body-weight 3 times daily.

Therefore, daily quantity for this child = 9kg / 0.45 = 20 x 3 = 60 drops = 60ml/ 20 = 3ml
                                             
Total quantity for 30 days = 3 x 30 = 90ml

This is exactly the correct quantity to fulfil the prescription. But the 30ml dropper bottle pack should not be supplied because it is not prescribable under NHS, except for treatment of iron deficiency in infants born prematurely (note to BNF entry), which this patient is not.  

5: C
 
Rationale


Measles shares some of the symptoms described with some of the other conditions listed, but the lesions in the mouth (Koplik's spots) are characteristic.