R4RIN – MCQs, Mock Tests | CSS[FPSC-U.S. Civil Service Commission]-USA [USA] Current Affairs 2021 Set 11

The interior structure of the Earth is divided into ________ layers.

1. 4
2. 5
3. 6
4. 7

✅ Correct Answer: 2

We live on the Earths

1. Inner core
2. Outer core
3. Crust
4. Mantle

✅ Correct Answer: 3

The thickest layer of the Earth is

1. Crust
2. Inner core
3. Outer core
4. Mantle

✅ Correct Answer: 4

The outermost layer of the Earth is

1. Crust
2. Inner mantle
3. Outer mantle
4. Core

✅ Correct Answer: 1

The Earths crust ranges from ________ km in depth.

1. 0 – 5
2. 5 – 10
3. 5 – 70
4. 10 – 70

✅ Correct Answer: 3

The Earths internal heat mainly comes from

1. Liquid hydrogen
2. Chemical reactions
3. Radioactive decay
4. Molecular kinetic energy

✅ Correct Answer: 3

There are different seasons on the Earth because of

1. Rotation of the Earth
2. Revolution of the Earth
3. The Earths axis is tilted
4. The Earths distance from the Sun

✅ Correct Answer: 3

On average, Air contains ________ % of water vapours.

1. 1
2. 3
3. 5
4. 7

✅ Correct Answer: 1

Earths troposphere extends from the Earths surface to an average height of about ________ km.

1. 10
2. 12
3. 15
4. 17

✅ Correct Answer: 2

The science of lightning is called

1. Aerology
2. Meteorology
3. Electeorology
4. Fulminology

✅ Correct Answer: 4

Ships use ________ to find the depth of the ocean beneath them.

1. pitches
2. echoes
3. frequencies
4. none of these

✅ Correct Answer: 2

Molecules with identical molecular formulae but with different structural formulae are called

1. Isomers
2. Isotopes
3. Atomic number
4. Mass number

✅ Correct Answer: 1

The anode is the electrode connected to the ________ terminal of a battery.

1. positive
2. negative
3. neutral
4. free

✅ Correct Answer: 1

The unit used to measure humidity is

1. Barometer
2. Hydrometer
3. Hygrometer
4. Galvanometer

✅ Correct Answer: 3

Laser was invented by

1. Alessandro Volta
2. William Sturgeon
3. Hero of Alexandria
4. Theodore Maiman

✅ Correct Answer: 4

The vernier calipers is used to measure

1. Length
2. Time
3. Temperature
4. Viscosity

✅ Correct Answer: 1

Atomic clock is used to measure ______ intervals of time.

1. Very short
2. Short
3. Very long
4. Long

✅ Correct Answer: 1

1 tonne = ________ kg

1. 100
2. 400
3. 1000
4. 4000

✅ Correct Answer: 3

An instrument used to measure atmospheric pressure is

1. Ammeter
2. Manometer
3. Galvanometer
4. Barometer

✅ Correct Answer: 4

An instrument used to measure gas pressure is

1. Ammeter
2. Manometer
3. Galvanometer
4. Barometer

✅ Correct Answer: 2

Which electromagnetic wave has the longest wavelength?

1. Gamma rays
2. X-rays
3. Microwaves
4. Radio waves

✅ Correct Answer: 4

Which electromagnetic wave has the shortest wavelength?

1. Gamma rays
2. X-rays
3. Microwaves
4. Radio waves

✅ Correct Answer: 1

All electromagnetic waves have the same

1. Frequency
2. Amplitude
3. Wavelength in vacuum
4. Speed in vacuum

✅ Correct Answer: 4

The reflection of sound is called

1. Frequency
2. Vibration
3. Echo
4. Wave

✅ Correct Answer: 3

An instrument used to measure electric current is called

1. Ammeter
2. Barometer
3. Galvanometer
4. Manometer

✅ Correct Answer: 1

The SI unit of thermodynamic temperature is

1. Celsius
2. Fahrenheit
3. Kelvin
4. None of these

✅ Correct Answer: 3

The shortest distance between crest to crest is called

1. phase
2. thoughs
3. amplitude
4. wavelength

✅ Correct Answer: 4

The speed of sound is fastest in

1. Solids
2. Liquids
3. Gasses
4. Vacuum

✅ Correct Answer: 1

The speed of sound is slowest in

1. Solids
2. Liquids
3. Gasses
4. Vacuum

✅ Correct Answer: 3

Radioactivity was discovered by

1. Henri Becquerel
2. Pierre Curie
3. Marie Curie
4. Rutherford

✅ Correct Answer: 1

Which from the following has the greatest ionizing power?

1. Alpha particles
2. Beta particles
3. Gamma rays
4. All three has same ionizing power

✅ Correct Answer: 1

Which from the following has the greatest penetrating power?

1. Alpha particles
2. Beta particles
3. Gamma rays
4. All three have same penetrating power

✅ Correct Answer: 3

Which from the following has the greatest speed?

1. Alpha
2. Beta
3. Gamma
4. None of these

✅ Correct Answer: 3

At night

1. The land cools faster than the water in the sea
2. The water in the sea cools faster than the land
3. The land and the water in the sea cools together
4. None of these

✅ Correct Answer: 1

The chemical name of chalk is

1. Sodium nitrate
2. Zinc sulfate
3. Sulphuric acid
4. Calcium carbonate

✅ Correct Answer: 4

The branch of science which study the interaction between matter and radiant energy is called

1. Thermochemistry
2. Polymer chemistry
3. Spectroscopy
4. Electrochemistry

✅ Correct Answer: 3

The horizontal rows of the periodic table are called

1. Groups
2. Periods
3. Sets
4. Matrices

✅ Correct Answer: 2

The vertical columns of the periodic table are called

1. Groups
2. Periods
3. Sets
4. Matrices

✅ Correct Answer: 1

Which metallic element is liquid at room temperature?

1. Zinc
2. Nickel
3. Lead
4. Mercury

✅ Correct Answer: 4

Which non-metallic element is liquid at room temperature?

1. Bromine
2. Flourine
3. Chlorine
4. Phosphorous

✅ Correct Answer: 1

Battery charger converts electrical energy into ______ energy.

1. Kinetic
2. Potential
3. Chemical
4. Nuclear

✅ Correct Answer: 3

A loudspeaker changes ______ energy into sound energy.

1. Chemical
2. Electrical
3. Light
4. Kinetic

✅ Correct Answer: 2

The strongest part(s) of a magnet is/are

1. North pole
2. South pole
3. North and south pole
4. Median of north and south pole

✅ Correct Answer: 3

Electromagnetic induction was discovered by

1. Nicolas Carnot
2. Alessandro Volta
3. Michael Faraday
4. Friedrich Bessel

✅ Correct Answer: 3

Battery was invented by

1. Nicolas Carnot
2. Alessandro Volta
3. Michael Faraday
4. Friedrich Bessel

✅ Correct Answer: 2

The most abundant form of matter in the universe is

1. Solid
2. Liquid
3. Gas
4. Plasma

✅ Correct Answer: 4

When gas is ionized, ________ forms.

1. Molecule
2. Element
3. Plasma
4. Current

✅ Correct Answer: 3

Wind is caused by

1. Difference in atmospheric pressure
2. Difference in atmospheric temperature
3. Rotation of the Earth
4. Revolution of the Earth

✅ Correct Answer: 1

Wind speed is measured by

1. Anemometer
2. Barometer
3. Ceilometer
4. Galvanometer

✅ Correct Answer: 1

The fact that universe is expanding was discovered by

1. Hahn
2. Hubble
3. Rontgen
4. Rutherford

✅ Correct Answer: 2