Question 1

PWR stands for                  
A)power
B)partially weathered rock
C)pressurized water reactor
D)packaging waste regulations

Accepted Answer

PWR stands for pressurized water reactor, a type of nuclear reactor.

Question 2

Select the incorrect statement which supports PWR.
A)water is used as coolant
B)pwr is stable in operation
C)uses natural fuel
D)pwr has positive power demand coefficient

Accepted Answer

PWRs (Pressurized Water Reactors) do not use natural fuel; they use enriched uranium, which is a processed form of natural uranium. Natural fuel is typically used in reactors like CANDU (Canada Deuterium Uranium) reactors, which use natural (unenriched) uranium.

Question 3

LWR stands for                    
A)lower water reactor
B)line water reactor
C)liquefied water reactor
D)light water reactor

Accepted Answer

LWR stands for Light Water Reactor, which is a type of thermal-neutron-spectrum reactor that uses normal water, as opposed to heavy water, as both its coolant and neutron moderator.

Question 4

In which of the Following reactor is heavy hydrogen isotope H-2 is used as moderator?
A)boiling water reactor
B)pressurized water reactor
C)candu reactor
D)thermal reactor

Accepted Answer

CANDU reactors use heavy water (D2O), where the hydrogen isotope is deuterium (H-2), as a moderator to slow down neutrons.

Question 5

CANDU stands for ______    
A)canadian natural darmstadtium uranium
B)canadian natural deuterium uranium
C)canadian natural dubnium uranium
D)canadian natural dysprosium uranium

Accepted Answer

CANDU stands for "Canadian Deuterium Uranium," which is a type of nuclear reactor that uses deuterium oxide (heavy water) as a moderator and coolant, and natural uranium as fuel.

Question 6

GCFBR stands for ______    
A)gas conditioned fast breeder reactor
B)gas cooled fast breeder reactor
C)gas conditioned fast boiling reactor.
D)gas cooled fast breeder reactor.

Accepted Answer

The answer of GCFBR stands for ______    
A)gas conditioned fast breeder...

Question 7

The mass number of an element is not changed, when it emits ______ radiations.
A)? & ?
B)?, ?, & ?
C)? & ?
D)? & ?

Accepted Answer

The answer of The mass number of an element is...

Question 8

Which is the most commonly used molten metal for cooling of nuclear reactors?
A)zinc
B)sulphur
C)sodium
D)manganese

Accepted Answer

Sodium is the most commonly used molten metal for cooling in nuclear reactors due to its excellent thermal conductivity and ability to remain liquid at room temperature, making it efficient for heat transfer.

Question 9

Fast breeder reactors do not ______
A)use molten sodium as coolant
B)use fast neutrons for fission
C)use th-232 as fissile fuel
D)convert fertile material to fissile material

Accepted Answer

Fast breeder reactors primarily use uranium-238 or plutonium-239 as fuel, not thorium-232. They are designed to breed more fissile material than they consume, using fast neutrons and often molten sodium as a coolant.

Question 10

A boiling water reactor is the one, in which the ______
A)pressurised water is pumped into the core.
B)coolant water, after being heated in the reactor core, generates steam in a boiler
C)fuel and the coolant are thoroughly mixed to form a homogeneous solution
D)coolant water is allowed to boil in the core of the reactor

Accepted Answer

In a boiling water reactor (BWR), the coolant water is allowed to boil directly in the reactor core, turning into steam that drives the turbine generators.

Question 11

Thermal shield is used in high powered nuclear reactors to ______
A)absorb the fast neutrons
B)protect the walls of the reactor from radiation damage
C)slow down the secondary neutrons
D)protect the fuel element from coming in contact with the coolant

Accepted Answer

Thermal shields in high-powered nuclear reactors are used to protect the walls of the reactor from radiation damage. They serve as a barrier to reduce the intensity of radiation reaching the reactor walls, thereby extending the life of the reactor and ensuring its structural integrity.

Question 12

Where was the first use of nuclear bombs which cause death to the millions of lives?
A)karachi
B)melbourne and sydney
C)hiroshima and nagasaki
D)tokyo

Accepted Answer

The first use of nuclear bombs in warfare was on the Japanese cities of Hiroshima and Nagasaki in August 1945, during World War II, by the United States.

Question 13

Who made the famous "Atoms for Peace" speech?
A)abraham lincoln
B)jawaharlal nehru
C)dwight d eisenhower
D)parker chewier

Accepted Answer

Dwight D. Eisenhower made the famous "Atoms for Peace" speech to the UN General Assembly on December 8, 1953, proposing the peaceful use of nuclear energy.

Question 14

How many percentage of fissionable U-235 occurring in uranium?
A)0.1%
B)0.5%
C)0.7%
D)1.5%

Accepted Answer

Natural uranium contains about 0.7% of the fissionable isotope U-235, the rest being mostly the non-fissionable U-238.

Question 15

Which is the main source of nuclear radiations?
A)nuclear power plant
B)sunlight
C)atmospheric air
D)volcanoes

Accepted Answer

Nuclear power plants are the main source of nuclear radiation as they produce energy through nuclear reactions, which release radiation.

Question 16

Which element of hydroelectric power plant prevents the penstock from water hammer phenomenon?
A)valves and gates
B)draft tubes
C)spillway
D)surge tank

Accepted Answer

Surge tanks are used in hydroelectric power plants to prevent water hammer in the penstock. Water hammer is a pressure surge caused when a fluid in motion is forced to stop or change direction suddenly. Surge tanks absorb these sudden changes in water pressure, protecting the penstock from potential damage.

Question 17

Trash racks are built for ______  
A)discharging the water freely from the turbine exit to tailrace
B)preventing the turbine from ingress of floating and other materials
C)creating artificial head to store sufficient potential energy of water
D)controlling the opening of valves

Accepted Answer

Trash racks are installed to prevent debris, floating materials, and other objects from entering the turbine, which could cause damage or reduce efficiency. They do not directly discharge water, create artificial head, or control valve openings.

Question 18

Which statement about surge tank is wrong?
A)ideal location of surge tank is at the turbine inlet
B)a decrease in load demands cause a rise in water level in surge tank
C)surge tanks are totally closed to avoid entry of unwanted objects to penstock
D)surge tanks are installed to reduce harm effects of water hammer phenomenon

Accepted Answer

Surge tanks are not always totally closed; they can be open or have vents to allow air in and out to accommodate water level changes and pressure fluctuations. Their primary purpose is to mitigate water hammer and manage pressure, not to block entry of objects into the penstock.

Question 19

Trash racks are located ______      
A)near tailrace
B)at the entrance of turbine
C)inside penstock
D)intake

Accepted Answer

Trash racks are located at the intake of a hydropower system to prevent debris from entering the system and damaging the turbines.

Question 20

A geothermal solution containing appreciable amounts of sodium chloride or other salts is called as ______
A)fluids
B)brine
C)solvent
D)magma

Accepted Answer

Brine is the term used to describe a solution containing high concentrations of sodium chloride or other salts, which is often associated with geothermal solutions.

Quiz 8: Terminology and Applications of Nuclear Power and Geothermal Energy

PWR stands for

Select the incorrect statement which supports PWR.

LWR stands for

In which of the Following reactor is heavy hydrogen isotope H-2 is used as moderator?

CANDU stands for ______

GCFBR stands for ______

The mass number of an element is not changed, when it emits ______ radiations.

Which is the most commonly used molten metal for cooling of nuclear reactors?

Fast breeder reactors do not ______

A boiling water reactor is the one, in which the ______

Thermal shield is used in high powered nuclear reactors to ______

Where was the first use of nuclear bombs which cause death to the millions of lives?

Who made the famous "Atoms for Peace" speech?

How many percentage of fissionable U-235 occurring in uranium?

Which is the main source of nuclear radiations?

Which element of hydroelectric power plant prevents the penstock from water hammer phenomenon?

Trash racks are built for ______

Which statement about surge tank is wrong?

Trash racks are located ______

A geothermal solution containing appreciable amounts of sodium chloride or other salts is called as ______