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Q.1
Which process allows water to enter the atmosphere?
Transpiration
Respiration
Condensation
Evaporation
Q.2
When a barometer reading suddenly recedes, it indicates that climate–
Will be very warm
Will be extremely stormy
Will remain cold
Incessant rain for at least 48
Q.3
When a barometer is rising air pressure is
Increasing
Decreasing
Constant
Zero
Q.4
When the barometer reading dips suddenly, it is an indication of
Hot weather
Calm weather
Storm
Dry weather
Q.5
A storm is predicted if atmospheric pressure
Rises suddenly
Rises gradually
Falls suddenly
Falls gradually
Q.6
Hydraulic machines work under the Principle of :
Newton's Law
Joules Law
Pascal's Law
Floatation Law
Q.7
Alcohol is more volatile than water because ________ is lower than water.
Its boiling point
Its density
Its viscosity
Its surface tension
Q.8
Anemometer is an instrument meant for measuring ________
Velocity
Air masses
Wind speed
Temperature
Q.9
A fountain pen works on the principle of
Flow of liquids from higher to lower potential
Capillary action
Bernoulli's principle
Viscosity of liquids
Q.10
The atmospheric air is held to the Earth by :
Gravity
Winds
Clouds
Rotation of the Earth
Q.11
The pressure exerted by a 760 mm column of mercury at 0°C is known as
1 pascal
1 atmosphere
1 bar
1 poise
Q.12
A manometer is used to measure
Earthquake
Pressure
Temperature
Density
Q.13
Anemometer is used to measure
Wind direction
Wind velocity
Pressure gradient
Wind speed and time
Q.14
A barometer is kept inside a bell jar. Air is slowly pumped out of the jar.
The mercury level starts rising
The mercury level starts falling
The mercury level does not change
The bell jar breaks up
Q.15
The temperature at which water boils depends mainly on
Air Pressure
Specific heat
Density
Relative humidity
Q.16
The pressure of a fluid varies with depth h as P = PQ+pgh, where p is the fluid density. This expression is associated with
Pascal's law
Newton's law
Bernoulli's principle
Archimedes' principle
Q.17
A parachute descends slowly whereas a stone dropped from the same height falls rapidly, because
Stone is heavier than parachute
Special mechanisms are present in parachute
A parachute has a larger surface area and air resistance is more
None of these
Q.18
The instrument used to measure the speed of the wind is
Altimeter
Anemometer
Chronometer
Dosimeter
Q.19
Air pressure is measured in which of the following units?
Steridian
Kg/mts
Newton
Pascal
Q.20
Why does bleeding occur through the nose in high mountainous regions ?
The pressure of blood in capillaries is greater than the outside pressure
The pressure at high altitudes is greater than that on the plains
The blood pressure of a person increases at high altitudes
The blood pressure fluctuates and finally decreases drastically
Q.21
Which of the following instruments is used to measure humidity ?
Kata Thermometer
Anemometer
Sling Psychrometer
Clinical Thermometer
Q.22
Which of these is true of all simple machines?
These make work easier
Work input > work output
Both A & B
None of the above
Q.23
What is the resistance (in ohm) of an electrical component if a current of 0.1 A passes through it on application of 5 V of potential difference across it?
0.5
100
50
1
Q.24
Which one of the following is used for sun glasses ?
Pyrex glass
Flint glass
Crooks glass
Crystal glass
Q.25
Radioactive elements can be traced out in living cell through a technique called
Centrifugation
Chromatography
Auto radiography
All the above
Q.26
The radiant energy having lowest energy is
Gamma rays
UV rays
Visible light
Microwave radiation
Q.27
The modulus of elasticity for mild steel is approximately equal to
210 kN/mm
2
100 kN/mm
2
80 kN/mm
2
10 kN/mm
2
Q.28
The Hooke's law is valid for
Only proportional region of the stress strain curve
Entire stress strain curve
Entire elastic region of the stress strain curve
Elastic as well as plastic region of the stress strain curve
Q.29
Instrument for measuring blueness of the sky or ocean is called ________
Bathymeter
Ceraunograph
Cyanometer
Barometer
Q.30
Photosynthesis takes place faster in
Darkness
Red light
White light
Yellow light
Q.31
The mercury and sodium street lamps light up because of :
Atomic emission
Atomic absorption
Electron emission
Electron absorption
Q.32
Nuclear Reactors are based on which of the following phenomenon?
Magnetic confinement of Plasma
Nuclear Fusion
Controlled Nuclear Fission
None of the above
Q.33
Gas thermometers are more sensitive than the liquid thermometers because the gases
Have large coefficient of expansion
Are lighter
Have low specific heat
Have high,specific heat
Q.34
What happens to a liquid, when the vapour pressure equals the atmospheric pressure?
The liquid cools
The liquid boils
No change
The liquid evaporates
Q.35
Which is a correct way to measure wavelength?
Nearest peak to peak
Nearest peak to nearest trough
Nearest trough to peak
None of the above
Q.36
The centre of gravity of a sprinter during the race lies
Ahead of his feet
Behind his feet
At the centre of the body
To the left side of the body
Q.37
Who enunciated the laws of planetary motion?
Nicolaus Copernicus
Johannes Kepler
Isaac Newton
Galileo
Q.38
In a bipolar junction transistor
All the three regions (the emitter, the base and the collector) have equal concentrations of impurity
The emitter has the least concentration of impurity
The collector has the least concentration of impurity
The base has the least concentration of impurity
Q.39
Addition of suitable impurities into semiconductor, is called
Doping
Mixing
Forming
Diluting
Q.40
The Capacity of a communication channel is measured in
Band rate
Band width
Data flow
Bit capacity
Q.41
The frequency used in TV and radar system lies in
VHF
HF
SHF
UHF
Q.42
The sharpness of a television image is termed as its
Clarity
Colour
Resolution
Graphics
Q.43
Which of the following is the fastest communication channel?
Microwave
Optical fiber
Radio wave
All are operating at nearly the same propagation speed
Q.44
Which type of radiation has the lowest penetrating ability?
Alpha
Beta
Gamma
All of the above
Q.45
An oil drop spreads over water because
Oil is lighter than water
Oil is more viscous
Oil does not mix with water
water has a higher surface tension
Q.46
If the temperature of a place increases suddenly, the relative humidity
Increases
Decreases
Remains constant
Fluctuates
Q.47
If the phase difference between two points is 120° for a wave with velocity of 360 m/s and frequency 500 Hz, then path difference between the two points is
1 cm
6 cm
12 cm
24 cm
Q.48
Why are we able to hear short wave broadcasts better than long wave broadcasts ?
Short waves are more energetic than long waves.
Short waves are unaffected by atmospheric disturbances.
Short wave broadcasts are made by nearby radio stations.
By convention, short waves are meant for long distances, whereas long waves are reserved for short distances.
Q.49
The frequency of ultrasound wave is typically
Above 20 kHz
Above 20,000 kHz
Below 20 kHz
Below 02 kHz
Q.50
The tidal waves on sea is mainly due to
Gravitational Effect of Moon on Earth
Gravitational Effect of Sun on Earth
Gravitational Effect of Earth on Moon
None of the above
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