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Home » Past Papers » Model Papers » Aptitude Test - 18
1.Night vision is possible with the help of :
A. Red light
B. Violet light
C. Ultra violet Light
D. Red light
2.Which gas is safe and an effective extinguisher for all confined fires?
A. Nitrogen dioxide
B. Carbon dioxide
C. Sulphur dioxide
D. Nitrogen dioxide
3.Which one of the following elements the drum of a Photostat machine is made up of:
A. Aluminium
B. Selenium
C. Barium
D. Aluminium
4.The most important stimulant in tea leaves is:
A. Brucine
B. Caffeine
C. Phenylalanine
D. Brucine
5.Which part of the camera is analogue to the retina in the human eye?
A. Lens
B. Film
C. Shutter
D. Lens
6.When a person enters a dark room from bright light he is not able to see clearly for a little while because the:
A. Eye is unable to adjust itself immediately
B. Retina becomes insensitive momentarily
C. Iris is unable to dilate the pupil immediately
D. Eye is unable to adjust itself immediately
7.What is the average adult pulse rate?
A. 140-150
B. 115-125
C. 72-80
D. 140-150
8.The beautiful color patterns exhibited by a peacock in its tail feathers are due to :
A. Selective absorption of light
B. Selective reflection of light
C. Sinterference of light
D. Selective absorption of light
9.A lake starts freezing because of the cold atmosphere. It will first freeze :
A. At the bottom
B. In the middle part
C. At the top surface
D. At the bottom
10.The sun appears red at sunrise and sunset while it appears white at noon, because :
A. Of refraction
B. It is cooler at sunrise and at sunset
C. Of scattering of light due to dust particles and air molecules
D. Of refraction
11.An astronaut inside a spacecraft is in a state of weightlessness. This implies that :
A. The mass of the astronaut is reduced to zero
B. Gravity inside the space craft ceases to act
C. the astronaut and the space craft are both in a free-falling state
D. The mass of the astronaut is reduced to zero
12.An iceberg is floating in sea. How much of its mass will remain above the surface of water?
A. One tenth
B. One fifth
C. One Fourth
D. One tenth
13.Most of the ozone in the atmosphere is concentrated in the :
A. Mesosphere
B. Troposphere
C. Stratosphere
D. Mesosphere
14.The cow’s milk contains how much amount of water in terms of percentage?
A. 60%
B. 80%
C. 90%
D. 60%
15. The Green House Effect is caused by an excess of :
A. Carbon dioxide
B. Carbon monoxide
C. Carbon tetra oxide
D. Carbon dioxide
16.Bats can also fly in dark because they are capable of taking the help of :
A. Ultraviolet Waves
B. Ultrasonic Waves
C. Electromagnetic Waves
D. Ultraviolet Waves
17. What is ‘Stealth Technology’?
A. A device which when attached to an aircraft makes it invisible on the radar
B. A coating which reduces the visibility of an aircraft on a radar
C. A technology by which it is possible for the aircraft to spy in the enemy air space
D. A device which when attached to an aircraft makes it invisible on the radar
18.The primary function of the feathers in birds is to :
A. Provide insulation for preserving body heat
B. Provide striking surface to the wings for flying
C. Make the surface body waterproof
D. Provide insulation for preserving body heat
19.The rear view mirror of a motor vehicle is :
A. Concave
B. Plane
C. Convex
D. Concave
20. Lead ball falls through water more slowly than through air because :
A. The value of ‘g’ is less than water
B. Density of air is less than that of water
C. Of the viscous force in water
D. The value of ‘g’ is less than water
21.A Fahrenheit thermometer indicates temperature of 14°F. Its corresponding reading on the Celsius scale will be:
A. -20C
B. -10C
C. +10C
D. -20C
22.Which one of the following sets of colour combinations is added in colour vision in TV?
A. Red, green and blue
B. Orange, black and violet
C. White , red and yellow
D. Red, green and blue
23.A train goes past a railway station at a high speed. A young boy standing on the edge of the platform is likely to :
A. Remain unaffected
B. Fall away from the train
C. Fall toward the train
D. Remain unaffected
24.Water is a highly effective coolant for a car engine because :
A. Water is good conductor of heat
B. Water has very high specific heat capacity
C. Evaporation of water produces lot of cooling
D. Water is good conductor of heat
25.In order to prevent the corrosion of iron pipes they are often coated with a layer of zinc. This process is termed as :
A. Electroplating
B. Annealing
C. Galvanization
D. Electroplating
26.Materials for rain-proof coats and tents owe their water proof properties to:
A. Surface tension
B. Viscosity
C. Specific gravity
D. Surface tension
27.Water has maximum density at:
A. 0 C
B. 4 C
C. 4.8 C
D. 0 C
28.The theory of Expanding Universe was first propounded by :
A. Einstein
B. Newton
C. Gahleo
D. Einstein
29.Water vapor beyond the dew point result in:
A. Hailstorm
B. Precipitation
C. Condensation
D. Hailstorm
30.The main chemical substance present in the bones and teeth of animals is:
A. Sodium chloride
B. Sugar
C. Calcium Phosphate
D. Sodium chloride
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