A:-Vital layer
B:-Zoogleal layer
C:-Primary treatment of sewage
D:-Secondary treatment of sewage
Correct Answer:- Option-D
Question19:-Which of the following is protective foods?
A:-Roots and tubers
-Wheat
C:-Vegetables
D:-Rice
Correct Answer:- Option-C
Question20:-Keratomalacia is caused by deficiency of which vitamin
A:-Vitamin A
B:-Vitamin D
C:-Vitamin E
D:-Vitamin K
Correct Answer:- Option-A
Question21:-The best indicator of infant nutrition is
A:-Height
B:-Weight
C:-Head circumference
D:-Chest circumference
Correct Answer:- Option-B

Question22:-Non nutritious substances which are added intentionally to food to improve the appearance, flavour or storage
properties are called

A:-Canning
B:-Steaming
C:-Food Additives
D:-Food fortification
Correct Answer:- Option-C
Question23:-Collection of pus around the teeth is called
A:-Pyorrhoea
B:-Dental plaque
-Dental Caries
D:-Halitosis
Correct Answer:- Option-A
Question24:-Mode of transmission of meningococcal meningitis is
A:-Droplet infection
B:-Contact with soil
C:-Biological transmission
D:-Mechanical transmission
Correct Answer:- Option-A
Question25:-The best method of refuse disposal is
A:-Dumbing
:-Composting
C:-Controlled tipping
D:-Burning
Correct Answer:-Question Cancelled
Question26:-Waste water which does not contain human excreta is
A:-Sewage
-Sullage
C:-Sludge
D:-Effluent
Correct Answer:- Option-B
Question27:-Which one of the following is used for fumigation of rat burrows?
A:-Barium carbonate
B:-Zinc phosphate
C:-Cyanogas
D:-Biogas