Question : A light year is a measure of 

Option 1: speed

Option 2: velocity

Option 3: distance

Option 4: time

Question : An instrument used to measure the density of milk is :

Option 1: Lactometer

Option 2: Barometer

Option 3: Calorimeter

Option 4: Polarimeter

Question : The instrument used to measure pressure :

Option 1: anemometer

Option 2: aneroid barometer

Option 3: hygrometer

Option 4: thermometer

Question : Venturi meters are used to measure:

Option 1: Rate of flow of liquids

Option 2: Liquid pressure

Option 3: Surface tension

Option 4: Liquid density

Question : If the ratio of the altitudes of two triangles is 3 : 4 and the ratio of their corresponding areas is 4 : 3, then the ratio of their corresponding lengths of bases is:

Option 1: 1 : 1

Option 2: 16 : 9

Option 3: 1 : 2

Option 4: 2 : 1