21) While dusting a carpet, we give a sudden jerk or beat it with a stick, because
(A) Inertia of rest keeps the dust in its position and the dirt is removed by the movement of carpet away
(B) Inertia of motion removes the dust
(C) The jerk compensates for the force of adhesion between the dust and the carpet and the dust is removed
(D) None of the above
22) After drinking contaminated water, you would be most apt to develop symptoms of
(A) Malaria
(B) Typhoid fever
(C) Yellow fever
(D) Schistosomiasis
23) In eye donation. which one of the following parts of donor's eye is utilized?
(A) Iris
(B) Lens
(C) Cornea
(D) Retina
24) Storage batteries commonly contain
(A) Copper
(B) Mercury
(C) Lead
(D) Iron
25) Washing soda in water behave
(A) Alkaline
(B) Acidic
(C) Neutral
(D) None of these
26) The gland which maintains temperature is the
(A) Pituitary gland
(B) Thyroid gland
(C) Adrenals
(D) Hypothalamus
27) Vinegar is prepared by the
(A) Fuming of date palms
(B) Fermentation of rotten grapes
(C) Fermentation of apple cider in the presence of air
(D) Dehydration of wine
28) Which one of the following colors has the longest wavelength?
(A) Yellow
(B) Blue
(C) Red
(D) Green
29) What does a Sphygmomanometer measure?
(A) Blood Pressure
(B) Atmospheric Pressure
(C) Pressure at the workplace
(D) Lung Pressure
30) The longest and the strongest bone in the human body is
(A) Tibia
(B) Pelvis
(C) Femur
(D) Jaw