Olympiad Class 9 Science Mock Test Set B

Question. In a cinema projector the films in the reel (frames) are made to roll forward at the rate of
(A) 8 films per second
(B) 16 films per second
(C) 18 films per second
(D) 32 films per second
Answer : B

Question. Sunil gave his clothes to his younger brother Hari when he outgrew. What is this practice known as ?
(A) Recycling
(B) Reusing
(C) Reducing
(D) Reinventing
Answer : B

Question. Why are LEDs extensively used to replace bulbs?
(A) They consumes less electricity
(B) They have longer life
(C) They are compact in size
(D) All of the above
Answer : D

Question. Which of the following agricultural tools is required to harvest a crop?
(A) Harrow
(B) Sickle
(C) Seed drill
(D) Plough
Answer : B

Question. The crust of earth is thicker
(A) under the continents
(B) under the ocean
(C) under the poles
(D) near faults
Answer : A

Question. In which of the following materials can sound travel through?
(A) Glass of water
(B) Balloon full of air
(C) Iron bar
(D) All of the above
Answer : D

Question. Observe the figure given below:

Answer : B

Question. When an oil well is drilled through rocks, what comes out first?
(A) Coal gas
(B) Marsh gas
(C) Natural gas
(D) Gas carbon
Answer : C

Question. When a man goes to the moon, his
(A) mass changes
(B) weight changes
(C) volume changes
(D) size changes
Answer : B

Question. Which of the following Ministries initiated a ‘Project Tiger’ programme to save tiger population?
(A) WHO
(B) WWE
(C) MEF
(D) UNEP
Answer : C

Question. The image formed by plane mirror is always
(A) real and erect
(B) virtual and erect
(C) virtual and inverted
(D) real and inverted
Answer : B

Question. To which of the following does the 4R principle apply the most?
(A) Synthetic fibre
(B) Natural fibre
(C) Metals
(D) Plastic
Answer : D

Question. Observe the figure showing a kerosene lamp.

Which of the following is not formed during the combustion of kerosene?
(A) Carbon dioxide
(B) Heat energy
(C) Carbon
(D) Water vapour
Answer : C

Question. The diagram given below shows the green house effect.

Which of the following would happen in the absence of greenhouse effect in the atmosphere?
(A) Pollution will increase
(B) Earth’s surface temperature will decrease
(C) Earth surface temperature will increase
(D) Earth’s surface temperature remains the same
Answer : C

Question. Identify a poor conductor of electricity.
(A) Copper sulphate solution
(B) Tap water
(C) Lemon juice
(D) Air
Answer : D

Question. How is Rhizobium useful to farmers?
(A) They help in nitrogen fixation in the soil.
(B) They help in killing pests.
(C) They make the soil airy, soft and fertile.
(D) They help in pulling out of weeds.
Answer : A

Question. Which of the following powders is used as a lubricant to reduce friction in machines?
(A) Graphite
(B) Chalk
(C) Sand
(D) Crushed stone
Answer : A

Question. Which of the following metals does not produce hydrogen gas when added to acid?
(A) Potassium
(B) Gold
(C) Zinc
(D) Lead
Answer : B

Question. By using which of the following can electrical charge be transferred from a charged object to another?
(A) Air
(B) Vacuum
(C) Insulator
(D) Conductor
Answer : D

Question. The statements given in the box describe an animal.
It is a carnivore.
It lives in a forest.
It is being wiped out by poachers killing them for their skin, bones, nails and teeth.
Identify the animal.
(A) Chinkara
(B) Black buck
(C) Tiger
(D) Chiru
Answer : C