Q36) The age of a tree is determined by its:
A) Height
B) Grith
C) Growth Rings
D) General Appearance

Q37) The density of milk can be measured by:
A) Hydrometer
B) Lactometer
C) Butyrometer
D) Thermometer

Q38) In Automobiles, Hydraulic Brake is works on:
A) Pascal’s Law
B) Archimedes Principal
C) Newton’s Law of Motion
D) Bernoulli’s Principal

Q39) The main components of Liquid Petrolium Gas (LPG) are:
A) Methane, Ethane and Hexane
B) Methane, Pentane and Hexane
C) Ethane, Propane and Butane
D) Methane, Carbon Monoxide & Hydrogen

Q40) Lack of which of the following substance in our body causes Diabetes:
A) Insulin
B) Haemoglobin
C) Histamin
D) Glycine