SPM

Q: All are true about randomized control trial except?

(a) :  Baseline characteristics of intervention and control groups must be similar
(b) :  Investigator bias can be minimized by double blinding
(c) :  The sample size depends on the hypothesis tested
(d) :  Drop outs should be excluded from the analysis
(e) :  None of the above
Answer:  Drop outs should be excluded from the analysis
Explanation:  

Q: Quantity of water available per capita considered adequate to meet the needs of all urban domestic purposes?

(a) :  100-150 L
(b) :  150-200 L
(c) :  200-250 L
(d) :  250-300 L
(e) :  None of the above
Answer:  150-200 L
Explanation:  

Q: Safe yield of a water supply source is the yield that is adequate for?

(a) :  80% of the year
(b) :  90% of the year
(c) :  95% of the year
(d) :  The whole of the year
(e) :  None of the above
Answer:  95% of the year
Explanation:  

Q: Modes of disease transmission by vectors are all except?

(a) :  Regurgitation
(b) :  Biting
(c) :  Ingestion
(d) :  Rubbing of of infected excrement
(e) :  None of the above
Answer:  Ingestion
Explanation:  

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