P-5, Q-3, R-1, S-2

Correct Option: B

P-5, Q-3, R-1, S-2

P-3, Q-4, R-1, S-2
Parliament Hinge is a kind of H hinge that allows for doors and windows to swing clear of the trim and lay flat when opened.

Aldrop is a kind of commonly used hardware which is used to close the door and lock it from one side. It is installed at the middle of the two doors and very easy to install.

Panic is a crash bar. Crash bar (also known as a panic exit device, panic bar, or push bar) is a type of door opening mechanism which allows users to open a door by pushing a bar.

Correct Option: C

P-3, Q-4, R-1, S-2
Parliament Hinge is a kind of H hinge that allows for doors and windows to swing clear of the trim and lay flat when opened.

Aldrop is a kind of commonly used hardware which is used to close the door and lock it from one side. It is installed at the middle of the two doors and very easy to install.

Panic is a crash bar. Crash bar (also known as a panic exit device, panic bar, or push bar) is a type of door opening mechanism which allows users to open a door by pushing a bar.

P-2, Q-3, R-4, S-5
The following are the important town classifications of Ancient India-Dandaka, Sarvathobhadra, N andyavarta, Padmaka, Swastika, Prastara, Karmuka and Chaturmukha.
NANDYAVARTA
This plan is commonly used for the construction of towns. It is generally adopted for the sites either circular or square in shape, 3000 - 4000 Houses. The streets run parallel to the central adjoining streets with the temple of the presiding deity in the center of the town. "Nandyavarta" is the name of a flower.

PADMAKA
This type of plan was practiced for building of the towns with fortress all round.The pattern of the plan resembles the petals of lotus radiating outwards from the center.The city used to be practically an island surrounded by water, having no scope for expansion.

SWASTIKA
Swastika type of plan contemplates some diagonal streets dividing the site into certain rectangular
plots. The site need not be marked out into a square or rectangle and it may be of any shape.A rampart wall surrounds the town, with a moat at its foot filled with water.Two main streets cross each other at the center, running south to north and west to east.

KARMUKA
This plan is suitable for the place where the site of the town is in the form of a bow or semi-circular or parabolic and mostly applied for towns located on the seashore or riverbanks.
The main streets of the town run from north to south or east to west and the cross streets run at right angles to them, dividing the whole area into blocks. The presiding deity, commonly a female deity, is installed in the temple build in any conveni ent pl ace. e.g. Shahj ahanabad; kaveripattinam

CHATURMUKHA
Chaturmukha type of plan is applicable to all towns starting fr om the largest town to the smallest village.Site may be either square or rectangular having four faces.The town is laid out east to west lengthwise, with four main streets.The temple of the presiding deity will be always at the center.

Correct Option: B

P-2, Q-3, R-4, S-5
The following are the important town classifications of Ancient India-Dandaka, Sarvathobhadra, N andyavarta, Padmaka, Swastika, Prastara, Karmuka and Chaturmukha.
NANDYAVARTA
This plan is commonly used for the construction of towns. It is generally adopted for the sites either circular or square in shape, 3000 - 4000 Houses. The streets run parallel to the central adjoining streets with the temple of the presiding deity in the center of the town. "Nandyavarta" is the name of a flower.

PADMAKA
This type of plan was practiced for building of the towns with fortress all round.The pattern of the plan resembles the petals of lotus radiating outwards from the center.The city used to be practically an island surrounded by water, having no scope for expansion.

SWASTIKA
Swastika type of plan contemplates some diagonal streets dividing the site into certain rectangular
plots. The site need not be marked out into a square or rectangle and it may be of any shape.A rampart wall surrounds the town, with a moat at its foot filled with water.Two main streets cross each other at the center, running south to north and west to east.

KARMUKA
This plan is suitable for the place where the site of the town is in the form of a bow or semi-circular or parabolic and mostly applied for towns located on the seashore or riverbanks.
The main streets of the town run from north to south or east to west and the cross streets run at right angles to them, dividing the whole area into blocks. The presiding deity, commonly a female deity, is installed in the temple build in any conveni ent pl ace. e.g. Shahj ahanabad; kaveripattinam

CHATURMUKHA
Chaturmukha type of plan is applicable to all towns starting fr om the largest town to the smallest village.Site may be either square or rectangular having four faces.The town is laid out east to west lengthwise, with four main streets.The temple of the presiding deity will be always at the center.

P-5, Q-4, R-1, S-2

Correct Option: C

P-5, Q-4, R-1, S-2

P-3, Q-4, R-5, S-2
⋅ Clarification (coagulation, flocculation, sedimentation and sludge removal) refers to the separation of particles such as dirt, organic matter, etc. from the water stream. One of the first steps in a conventional water purification process is the addition of inorganic coagulants or chemicals to assist in the removal of or ganic and inor ganic particles suspended in water and contributing to its turbidity and color. Chemical addition, i.e. aluminium sulphate or alum, destabilizes the particle charges and prepares them for clarification either by settling or floating out of the water stream. Flocculation refers to the process by which fine particulates are caused to clump together under natural processes such as Brownian motion and through induced mixing into a floc (amorphous metal hydroxides). The floc may then float to the top of the liquid (creaming), settle to the bottom of the liquid (sedimentation), or be readily filtered from the liquid. Water exiting the flocculation basin enters the sedimentation basin, allowing floc to settle to the bottom.
⋅ Sand Filtration uses Sand, anthracite or activated carbon filters to refine the water stream (from which floc has been separated) removing smaller particulate matter and any unsettled floc. Most common type is a rapid sand filter. Slow sand filters are used when larger area is avaliable as the water must pass very slowly through the filters and the filters rely on the biological processes. The filters are constructed using graded layers of sand, with the coarsest sand at the bottom and finest sand at the top.
⋅ Disinfection via chlorine addition is the most common method in use. Chlorine being a strong oxidant, effectively kills bacteria and most viruses and maintains a residual to protect the water supply through the supply network.
⋅ Softening: Sodium zeolite is an ion exchange resin used for water softening (where Ca2⁺ and Mg2⁺ ions are replaced with Na⁺ or K⁺ ions) and for removal of toxic ions such as nitrite, lead, mercury, arsenic and others.

Correct Option: D

P-3, Q-4, R-5, S-2
⋅ Clarification (coagulation, flocculation, sedimentation and sludge removal) refers to the separation of particles such as dirt, organic matter, etc. from the water stream. One of the first steps in a conventional water purification process is the addition of inorganic coagulants or chemicals to assist in the removal of or ganic and inor ganic particles suspended in water and contributing to its turbidity and color. Chemical addition, i.e. aluminium sulphate or alum, destabilizes the particle charges and prepares them for clarification either by settling or floating out of the water stream. Flocculation refers to the process by which fine particulates are caused to clump together under natural processes such as Brownian motion and through induced mixing into a floc (amorphous metal hydroxides). The floc may then float to the top of the liquid (creaming), settle to the bottom of the liquid (sedimentation), or be readily filtered from the liquid. Water exiting the flocculation basin enters the sedimentation basin, allowing floc to settle to the bottom.
⋅ Sand Filtration uses Sand, anthracite or activated carbon filters to refine the water stream (from which floc has been separated) removing smaller particulate matter and any unsettled floc. Most common type is a rapid sand filter. Slow sand filters are used when larger area is avaliable as the water must pass very slowly through the filters and the filters rely on the biological processes. The filters are constructed using graded layers of sand, with the coarsest sand at the bottom and finest sand at the top.
⋅ Disinfection via chlorine addition is the most common method in use. Chlorine being a strong oxidant, effectively kills bacteria and most viruses and maintains a residual to protect the water supply through the supply network.
⋅ Softening: Sodium zeolite is an ion exchange resin used for water softening (where Ca2⁺ and Mg2⁺ ions are replaced with Na⁺ or K⁺ ions) and for removal of toxic ions such as nitrite, lead, mercury, arsenic and others.