R4RIN – MCQs, Mock Tests | CSS[FPSC-U.S. Civil Service Commission]-USA [USA] Current Affairs 2021 Set 10

Battery was invented by

1. Volta
2. Hero
3. Fermi
4. Maiman

✅ Correct Answer: 1

The most abundant element in the earths crust is oxygen. The second most abundant element in the earths crust is

1. Hydrogen
2. Nitrogen
3. Brass
4. Silicon

✅ Correct Answer: 4

The nearest planet to the Sun is

1. Mercury
2. Venus
3. Mars
4. Jupiter

✅ Correct Answer: 1

Bronze is an alloy of

1. Iron, Carbon
2. Copper, Tin
3. Nickel, Zinc
4. Mercury, Lead

✅ Correct Answer: 2

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

1. Isotopes
2. Isomers
3. Electrode
4. Compound

✅ Correct Answer: 2

One way of transfer of heat energy is convection which occurs in

1. Liquids only
2. Gasses only
3. Liquids and gasses
4. Liquids, gasses and solids

✅ Correct Answer: 3

Which from the following is incompressible?

1. Solids
2. Liquids
3. Gasses
4. All are compressible

✅ Correct Answer: 2

The key factor in determining the weather is the quantity of ________ in the atmosphere

1. Water vapour
2. Oxygen
3. Carbon dioxide
4. Hydrogen

✅ Correct Answer: 1

The entropy of the universe is

1. Increasing
2. Decreasing
3. Constant
4. None of these

✅ Correct Answer: 1

Which from the following methods of heat transfer can take place in a vacuum?

1. Conduction
2. Convection
3. Radiation
4. All of the above

✅ Correct Answer: 3

Neutrons were discovered by

1. Einstein
2. James Chadwick
3. F.W. Aston
4. Rutherford

✅ Correct Answer: 2

Mass Spectrograph was invented by

1. Einstein
2. James Chadwick
3. F.W. Aston
4. Rutherford

✅ Correct Answer: 3

Nucleus was discovered by

1. Einstein
2. James Chadwick
3. F.W. Aston
4. Rutherford

✅ Correct Answer: 4

Which is the process of science?

1. Observation > Experiments > Hypothesis
2. Hypothesis > Observations > Experiments
3. Observation > Hypothesis > Experiments
4. Experiments > Observations > Hypothesis

✅ Correct Answer: 3

Salty water can be made pure by the method of

1. filtration
2. evaporation
3. chromatography
4. distillation

✅ Correct Answer: 4

The unit of efficiency is

1. Volt
2. Watt
3. Joules
4. None of these

✅ Correct Answer: 4

Which from the following is NOT a stored energy?

1. Thermal
2. Gravitational
3. Elastic potential energy
4. Chemical

✅ Correct Answer: 1

Energy can be converted from one form to another, but all energy ends up as

1. Kinetic energy
2. Potential energy
3. Heat energy
4. Chemical energy

✅ Correct Answer: 3

A battery converts ________ into electrical energy.

1. Potential energy
2. Chemical energy
3. Nuclear energy
4. Mechanical energy

✅ Correct Answer: 2

Which from the following is NOT a renewable energy resource?

1. Geothermal
2. Biomass
3. Solar
4. Nuclear

✅ Correct Answer: 4

Which from the following is NOT a non-renewable energy resource?

1. Coal
2. Natural gas
3. Nuclear
4. Geothermal

✅ Correct Answer: 4

Current is the flow of

1. Electrons
2. Protons
3. Neutrons
4. Voltage

✅ Correct Answer: 1

The unit of current is

1. Volt
2. Ampere
3. Ohm
4. Watt

✅ Correct Answer: 2

To prevent electric shocks, a/an ________ is placed in the circuit.

1. Ammeter
2. Voltmeter
3. Fuse
4. Diode

✅ Correct Answer: 3

Electrons were discovered by

1. James Chadwick
2. J.J. Thomson
3. F.W. Aston
4. Rutherford

✅ Correct Answer: 2

When molten rock cools and solidifies, the ________ are formed.

1. igneous rocks
2. sedimentary rocks
3. metamorphic rocks
4. none of these

✅ Correct Answer: 1

Molten rock below the surface of the Earth is called?

1. Lava
2. Magma
3. Crystals
4. Granite

✅ Correct Answer: 2

Molten rock above the surface of the Earth is called?

1. Lava
2. Magma
3. Crystals
4. Granite

✅ Correct Answer: 1

The metal which is liquid at room temperature is?

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

✅ Correct Answer: 4

Between the melting point and boiling point of a substance, the substance is a?

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

✅ Correct Answer: 2

The boiling point of alcohol is

1. 78 °C
2. 86 °C
3. 94 °C
4. 100 °C

✅ Correct Answer: 1

The visible cloud of dust and gas in space is called?

1. White Dwarf
2. Supernova
3. Nebula
4. Galaxy

✅ Correct Answer: 3

he average salinity of the Earths oceans in 1 kilogram of sea water is about ________ grams of salt.

1. 90
2. 25
3. 30
4. 35

✅ Correct Answer: 4

The most abundant substance that constitutes the mass of the Earth is?

1. Iron
2. Oxygen
3. Nitrogen
4. Silicon

✅ Correct Answer: 1

he Earths atmosphere is divided into ________ main layers.

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

✅ Correct Answer: 2

Rocks which are formed by high temperature and pressure on existing rocks over a period of time are called ________ rocks.

1. igneous
2. metamorphic
3. sedimentary
4. crystal

✅ Correct Answer: 2

Marble and slate are examples of

1. igneous rocks
2. metamorphic rocks
3. sedimentary rocks
4. crystals

✅ Correct Answer: 2

Sandstone and limestone are examples of

1. igneous rocks
2. metamorphic rocks
3. sedimentary rocks
4. crystals

✅ Correct Answer: 3

Absolute zero, which is the lower limit of the thermodynamic temperature scale, is equivalent to ________ on the Celsius scale.

1. 273 °C
2. 0 °C
3. 100 °C
4. 973 °C

✅ Correct Answer: 1

The diameter of the Earths equator is larger than the pole-to-pole diameter by

1. 40 km
2. 43 km
3. 46 km
4. 49 km

✅ Correct Answer: 2

The Tectonic Plates of the Earth lies in

1. Inner Core
2. Outer Core
3. Lithosphere
4. Asthenosphere

✅ Correct Answer: 3

There are ________ major tectonic plates.

1. 45
2. 5
3. 6
4. 7

✅ Correct Answer: 4

The fresh water on the Earth is ________ of the total water.

1. 2.50%
2. 5%
3. 7.50%
4. 10%

✅ Correct Answer: 1

The Ozone Layer lies in the

1. troposphere
2. stratosphere
3. mesosphere
4. thermosphere

✅ Correct Answer: 2

The Earths atmosphere is divided into ________ layers.

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

✅ Correct Answer: 2

Which type of rock may contain fossils?

1. Igneous
2. Metamorphic
3. Sedimentary
4. Crystals

✅ Correct Answer: 3

The mass is highly concentrated form of

1. Weight
2. Energy
3. Force
4. Momentum

✅ Correct Answer: 2

The whole Earth can be covered by ________ geo-stationary satellites.

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

✅ Correct Answer: 1

The ozone layer is at height of ________ kilometers from the surface of the Earth.

1. 10 to 20
2. 20 to 30
3. 30 to 40
4. 40 to 50

✅ Correct Answer: 2

The ozone layer was discovered by

1. F.W. Aston and J.J Thomson
2. Albert Einstein
3. Rutherford
4. Charles Fabry and Henri Buisson

✅ Correct Answer: 4