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PSEB Class 12 Modelling & Sculpture study materials
PSEB Class 12 Modelling & Sculpture study resources

PSEB Class 12 Modelling & Sculpture practice questions

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Question 1History and appreciation of Indian sculpture (Indus Valley, Mauryan, Sunga, Kushana, Gupta, medieval and folk traditions)

Which technique was used to produce the Harappan bronze figure known as the Dancing Girl from Mohenjo-daro?

  1. Repoussé hammering over a wooden core
  2. Lost-wax (cire perdue) casting Correct answer.
  3. Carving from a single block of steatite
  4. Wheel-thrown terracotta joined in sections

Explanation

The Dancing Girl was modelled in wax, encased in clay and fired so that the wax ran out before molten bronze was poured in - the cire perdue, or lost-wax, method. Because each wax model is destroyed in the process, the resulting figure is unique, which is why the slender limbs and stacked bangles could be rendered so finely.

Question 2History and appreciation of Indian sculpture (Indus Valley, Mauryan, Sunga, Kushana, Gupta, medieval and folk traditions)

The mirror-like, highly polished surface of Ashokan columns such as the Sarnath Lion Capital is characteristic of which stone?

  1. Chunar sandstone Correct answer.
  2. Grey Gandharan schist
  3. White marble
  4. Black basalt

Explanation

Ashokan pillars were quarried at Chunar near Varanasi and transported across the empire; this fine-grained sandstone takes a very high polish that has sometimes been mistaken for glass or metal. The Sarnath Lion Capital shares that finish with the other surviving pillar edicts.

Question 3History and appreciation of Indian sculpture (Indus Valley, Mauryan, Sunga, Kushana, Gupta, medieval and folk traditions)

The seated Buddha from Sarnath, a classic Gupta image, is best described by which combination of features?

  1. Grey schist with wavy hair and a toga-like robe
  2. Cream sandstone with diaphanous drapery Correct answer.
  3. Bronze with inlaid silver eyes and a flaming halo
  4. Red sandstone with a moustache and heavy jewellery

Explanation

Gupta Sarnath Buddhas are cut from a pale cream sandstone and wear a monastic robe modelled so thinly that the contours of the body read through it, a quality usually called transparent drapery. The halo is plain and restrained, and the hair is normally in snail-shell curls rather than the wavy locks of Gandhara.

Question 4History and appreciation of Indian sculpture (Indus Valley, Mauryan, Sunga, Kushana, Gupta, medieval and folk traditions)

The Didarganj Yakshi holds a fly-whisk and displays an exceptionally high polish on her sandstone body. These traits place her closest to which tradition?

  1. Gandharan schist relief
  2. Kushana Mathura portraiture
  3. Chola processional bronze
  4. Mauryan-Sunga court art Correct answer.

Explanation

The Didarganj Yakshi carries a chamara, the fly-whisk of a court attendant, and her surface has the mirror polish associated with Mauryan imperial workshops; most scholars place her between the Mauryan and Sunga periods. The chauri-bearer role and the polish together separate her from later Kushana, Gandharan and Chola work.

Question 5History and appreciation of Indian sculpture (Indus Valley, Mauryan, Sunga, Kushana, Gupta, medieval and folk traditions)

What most clearly distinguishes the Bharhut railing reliefs of the Sunga period from earlier Mauryan sculpture?

  1. Brahmi labels naming scenes and donors Correct answer.
  2. Use of grey schist and Hellenistic drapery
  3. Cast bronze figures made by lost-wax
  4. Life-size royal portraits in polished stone

Explanation

Bharhut's railings and gateway beams carry short Brahmi inscriptions that name the jataka or episode depicted and record the donors who paid for the carving, an unusually explicit labelling for such early relief. This makes Bharhut a key source for early Buddhist narrative art and patronage.

Question 6History and appreciation of Indian sculpture (Indus Valley, Mauryan, Sunga, Kushana, Gupta, medieval and folk traditions)

A Kushana Buddha image is carved in mottled red sandstone with a shaven head, a stiff frontal pose and a simple halo. To which school does it belong?

  1. Mathura Correct answer.
  2. Amaravati
  3. Sarnath Gupta
  4. Gandhara

Explanation

Mathura's Kushana workshops worked the local mottled red Sikri sandstone, and their Buddhas are frontal, with a shaven head or snail-shell ushnisha and a plain halo. Gandhara preferred grey schist, Gupta Sarnath cream sandstone, and Amaravati white limestone.

Question 7History and appreciation of Indian sculpture (Indus Valley, Mauryan, Sunga, Kushana, Gupta, medieval and folk traditions)

Chola Nataraja images are hollow bronze castings. Which method produced them, and what was their primary use?

  1. Terracotta modelling, for votive deposits
  2. Sand casting, for temple wall niches
  3. Stone carving, for gateway towers
  4. Lost-wax casting for processional ritual Correct answer.

Explanation

Chola bronzes were modelled in wax, invested in clay and cast by the lost-wax method, leaving a hollow shell light enough to lift and carry. The images were primarily processional, taken out of the sanctum on festival days, while the stone images stayed fixed in the temple.

Question 8History and appreciation of Indian sculpture (Indus Valley, Mauryan, Sunga, Kushana, Gupta, medieval and folk traditions)

Dhokra metalwork, as practised in Bastar and parts of Bengal, is best identified as which of the following?

  1. Sheet-metal repoussé on a lac core
  2. Tribal lost-wax brass casting Correct answer.
  3. Inlaid bidri ware with silver wire
  4. Iron forging with welded joints

Explanation

Dhokra is a non-ferrous lost-wax tradition: a beeswax model is covered with clay, the wax is melted out and molten brass or bell metal is poured into the cavity. Bastar and parts of Bengal, Jharkhand and Odisha still produce small figures and ornaments by this method.

Question 9History and appreciation of Indian sculpture (Indus Valley, Mauryan, Sunga, Kushana, Gupta, medieval and folk traditions)

Which set of features most reliably distinguishes a Gandharan Buddha from a Mathuran Buddha of the Kushana period?

  1. Wavy hair, deep drapery folds, grey schist Correct answer.
  2. Red sandstone, dhoti, and a fly-whisk bearer
  3. Shaven head, halo, right hand raised in abhaya
  4. Cream sandstone, transparent robe, plain halo

Explanation

Gandhara's workshops, working in grey schist under strong Hellenistic and Roman contact, gave the Buddha wavy hair, occasionally a moustache, and a robe with deep naturalistic folds. Mathura's Kushana Buddhas are cut in red sandstone with a shaven head and a stiffer frontal body, so hair, drapery and stone are the dependable diagnostics.

Question 10History and appreciation of Indian sculpture (Indus Valley, Mauryan, Sunga, Kushana, Gupta, medieval and folk traditions)

The vast open-air relief at Mahabalipuram depicting the Descent of the Ganges belongs to which dynasty and carving method?

  1. Hoysala, relief on chloritic schist
  2. Rashtrakuta, rock-cut in basalt
  3. Chandela, high relief in buff sandstone
  4. Pallava, granite boulder relief Correct answer.

Explanation

The Descent of the Ganges at Mahabalipuram was carved under Pallava patronage directly into a large natural granite boulder, exploiting its central cleft for the descending river. Elephants, ascetics and celestial beings crowd the composition, which is one of the largest open-air reliefs in India.

Question 11History and appreciation of Indian sculpture (Indus Valley, Mauryan, Sunga, Kushana, Gupta, medieval and folk traditions)

The Harappan male bust popularly called the Priest-King, found at Mohenjo-daro, was carved from which material?

  1. Cast bronze using the lost-wax method
  2. Fired terracotta clay
  3. Red sandstone from the Mathura region
  4. Steatite, a soft metamorphic stone Correct answer.

Explanation

The Mohenjo-daro Priest-King is a small steatite bust with drilled sockets for inlaid eyes. Steatite is soft enough to carve in fine detail and hardens when heated. It is not the red sandstone used for the later Mathura Buddha or the Harappan male torso.

Question 12History and appreciation of Indian sculpture (Indus Valley, Mauryan, Sunga, Kushana, Gupta, medieval and folk traditions)

On the abacus of the Sarnath Lion Capital, the four animals carved between the wheels are...

  1. elephant, bull, horse and lion Correct answer.
  2. elephant, camel, horse and bull
  3. lion, tiger, deer and peacock
  4. lion, horse, deer and bull

Explanation

The Sarnath abacus carries four animals-elephant, bull, horse and lion-alternating with wheels. Each animal is a symbol associated with the Buddha's life and teaching, and the four lions above face the cardinal directions.

Question 13History and appreciation of Indian sculpture (Indus Valley, Mauryan, Sunga, Kushana, Gupta, medieval and folk traditions)

Traditional Kondapalli toys from Andhra Pradesh are carved from which material?

  1. soft puniki wood Correct answer.
  2. black basalt from the Nalanda region
  3. bell metal used in dhokra casting
  4. fired terracotta clay plaques

Explanation

Kondapalli craftsmen carve toys from puniki, a light softwood, then paint them with bright colours. The soft wood allows delicate shaping of figures, animals and palanquins.

Question 14History and appreciation of Indian sculpture (Indus Valley, Mauryan, Sunga, Kushana, Gupta, medieval and folk traditions)

In Sunga-period railing reliefs such as those at Sanchi, the shalabhanjika figure touching a tree is best understood as...

  1. a Jain tirthankara
  2. a tree-spirit yakshi Correct answer.
  3. a royal portrait of a queen
  4. a Buddhist wisdom deity

Explanation

The shalabhanjika is a yakshi or female tree spirit whose touch makes the tree bloom. The motif is auspicious and fertility-related, and it was absorbed into Buddhist railing decoration at sites such as Sanchi.

Question 15History and appreciation of Indian sculpture (Indus Valley, Mauryan, Sunga, Kushana, Gupta, medieval and folk traditions)

The inscribed statue of King Kanishka from Mat near Mathura is distinctive because the king is shown...

  1. as a naked Jain ascetic holding a fly-whisk
  2. in Central Asian tunic and boots Correct answer.
  3. as a four-armed Vishnu wearing a garland
  4. wearing the draped robe of a Buddhist monk

Explanation

The Mat portrait shows Kanishka standing frontally in a long tunic, trousers and boots, with a sword and mace. This Central Asian dress reflects the Kushana rulers' origins and distinguishes the image from Buddhist figures.

Question 16History and appreciation of Indian sculpture (Indus Valley, Mauryan, Sunga, Kushana, Gupta, medieval and folk traditions)

The colossal bronze Buddha found at Sultanganj in Bihar is dated to which period?

  1. Kushana
  2. Mauryan
  3. Gupta Correct answer.
  4. Pala

Explanation

The Sultanganj Buddha is a large hollow-cast bronze of the Gupta period, now in Birmingham Museum. Its smooth modelling and clinging robe are typical of Gupta metalwork.

Question 17History and appreciation of Indian sculpture (Indus Valley, Mauryan, Sunga, Kushana, Gupta, medieval and folk traditions)

Pala-period Buddhist sculptures from Nalanda and Kurkihar are typically carved in which stone?

  1. black basalt Correct answer.
  2. white marble from Makrana
  3. grey schist from Gandhara
  4. red sandstone from Mathura

Explanation

Pala sculptors worked mainly in black basalt, a dense stone that takes a high polish and crisp detail. The dark surface contrasts with the intricate jewellery and haloes of Buddhist and Hindu images.

Question 18History and appreciation of Indian sculpture (Indus Valley, Mauryan, Sunga, Kushana, Gupta, medieval and folk traditions)

Hoysala temple sculpture at Belur and Halebidu is carved from which material, and what visual effect does it produce?

  1. red sandstone, giving warm colour and plain surfaces
  2. chloritic schist, allowing fine undercutting Correct answer.
  3. terracotta, giving a rough porous texture
  4. white marble, giving sharp translucent edges

Explanation

Hoysala temples such as Belur and Halebidu use chloritic schist, often called soapstone. Its softness allowed sculptors to cut deeply undercut, lace-like ornament before the stone hardened on exposure.

Question 19History and appreciation of Indian sculpture (Indus Valley, Mauryan, Sunga, Kushana, Gupta, medieval and folk traditions)

The Lohanipur torso from Patna, a polished sandstone fragment, is significant as an early image associated with which faith?

  1. Buddhism
  2. Vaishnavism
  3. Jainism Correct answer.
  4. Shaivism

Explanation

The Lohanipur torso is a polished sandstone fragment from Patna dated to the Mauryan or early Sunga period. It is widely regarded as one of the earliest surviving Jain cult images, showing a nude male figure in a standing pose.

Question 20History and appreciation of Indian sculpture (Indus Valley, Mauryan, Sunga, Kushana, Gupta, medieval and folk traditions)

The monolithic Gommateshwara statue at Shravanabelagola was commissioned by Chamundaraya under which dynasty?

  1. Chola
  2. Hoysala
  3. Rashtrakuta
  4. Ganga Correct answer.

Explanation

Chamundaraya, a minister of the Western Ganga dynasty, commissioned the Gommateshwara statue at Shravanabelagola in 981 CE. The 17-metre monolithic figure of Bahubali is a key Jain pilgrimage image.

Question 21History and appreciation of Indian sculpture (Indus Valley, Mauryan, Sunga, Kushana, Gupta, medieval and folk traditions)

Harappan seals such as those found at Mohenjo-daro were usually carved from which material?

  1. Steatite Correct answer.
  2. Cast bronze
  3. Marble
  4. Granite

Explanation

Most Harappan seals were cut from steatite, a soft soapstone that could be carved in fine detail and then fired. The same material takes the white paste used for seal impressions, which is why thousands of examples survive.

Question 22History and appreciation of Indian sculpture (Indus Valley, Mauryan, Sunga, Kushana, Gupta, medieval and folk traditions)

Ashokan pillars such as the one at Sarnath were carved from sandstone obtained chiefly from which quarry region?

  1. Amaravati
  2. Mathura
  3. Khajuraho
  4. Chunar Correct answer.

Explanation

The Mauryan workshops used sandstone quarried around Chunar in present-day Uttar Pradesh. The stone was transported to distant sites and finished with the characteristic mirror-like polish.

Question 23History and appreciation of Indian sculpture (Indus Valley, Mauryan, Sunga, Kushana, Gupta, medieval and folk traditions)

Molela, known for painted terracotta relief plaques depicting folk deities, lies in which state?

  1. Odisha
  2. Assam
  3. Rajasthan Correct answer.
  4. Kerala

Explanation

Molela is a village in Rajsamand district, Rajasthan, where Kumbhar artisans make terracotta plaques for local Bhil deities. The plaques are modelled, dried, fired and then brightly painted.

Question 24History and appreciation of Indian sculpture (Indus Valley, Mauryan, Sunga, Kushana, Gupta, medieval and folk traditions)

The relief panels from the great stupa at Amaravati were carved predominantly in which material?

  1. Terra cotta
  2. Limestone Correct answer.
  3. Cast bronze
  4. Steatite

Explanation

The Amaravati stupa reliefs of the Satavahana period were carved in limestone, often described in older literature as marble. They form one of the most important narrative sculptural programmes of early historic South India.

Question 25History and appreciation of Indian sculpture (Indus Valley, Mauryan, Sunga, Kushana, Gupta, medieval and folk traditions)

Which dynasty commissioned the monolithic Kailasanatha temple at Ellora, carved downward from a single rock mass?

  1. Pallava
  2. Eastern Ganga
  3. Chandela
  4. Rashtrakuta Correct answer.

Explanation

The Kailasanatha temple at Ellora was commissioned under the Rashtrakuta king Krishna I in the eighth century. Its makers cut downward into the basalt cliff, freeing a complete temple rather than building it up from blocks.

Question 26History and appreciation of Indian sculpture (Indus Valley, Mauryan, Sunga, Kushana, Gupta, medieval and folk traditions)

The Khajuraho temples, with their dense bands of sculpted figures, were built under which ruling dynasty?

  1. Kakatiya
  2. Solanki
  3. Chandela Correct answer.
  4. Hoysala

Explanation

The Khajuraho group was built under the Chandela dynasty between roughly the tenth and eleventh centuries. Its sandstone temples carry extensive sculptural bands showing deities, celestial beings and erotic motifs.

Question 27History and appreciation of Indian sculpture (Indus Valley, Mauryan, Sunga, Kushana, Gupta, medieval and folk traditions)

The Dashavatara Temple at Deogarh is celebrated for a large south-wall panel showing which theme?

  1. Shiva as Nataraja
  2. Mahishasuramardini
  3. The Buddha's first sermon
  4. Vishnu reclining on Shesha Correct answer.

Explanation

The Deogarh Dashavatara Temple contains a famous Gupta-period panel of Vishnu Anantasayana, the god reclining on the serpent Shesha. The composition places the sleeping Vishnu at the centre of a cosmic narrative.

Question 28History and appreciation of Indian sculpture (Indus Valley, Mauryan, Sunga, Kushana, Gupta, medieval and folk traditions)

The fifth-century sculptural and painted caves at Ajanta were patronized chiefly by which dynasty?

  1. Chola
  2. Maurya
  3. Rashtrakuta
  4. Vakataka Correct answer.

Explanation

The major Ajanta caves of the fifth century were patronized under the Vakataka dynasty, especially during the reign of Harishena. Their sculpture and painting show a mature Gupta-influenced style in a Deccan setting.

Question 29History and appreciation of Indian sculpture (Indus Valley, Mauryan, Sunga, Kushana, Gupta, medieval and folk traditions)

The colossal Varaha panel at Udayagiri near Vidisha, showing the boar avatar lifting the earth goddess, belongs to which period?

  1. Kushana
  2. Maurya
  3. Sunga
  4. Gupta Correct answer.

Explanation

The Udayagiri Varaha relief is a Gupta-period work, generally dated to the reign of Chandragupta II in the early fifth century. Its large scale and political overtones make it a key example of Gupta rock-cut sculpture.

Question 30History and appreciation of Indian sculpture (Indus Valley, Mauryan, Sunga, Kushana, Gupta, medieval and folk traditions)

Which sequence places these sculptural phases in correct chronological order, from earliest to latest?

  1. Maurya, Indus Valley, Gupta, Kushana
  2. Indus Valley, Kushana, Sunga, Gupta
  3. Sunga, Indus Valley, Kushana, Gupta
  4. Indus Valley, Sunga, Kushana, Gupta Correct answer.

Explanation

The mature Indus Valley phase precedes the Sunga period, which is followed by Kushana and then Gupta sculpture. The sequence runs roughly from the third millennium BCE through the Sunga second-first centuries BCE, Kushana first-third centuries CE, and Gupta fourth-sixth centuries CE.

Question 31Materials, tools, armature and studio safety (clay, plaster, wax, wood, stone, metal; modelling stands and implements)

What does plaster of Paris do as it sets after being mixed with water?

  1. It remains flexible until fired in a kiln.
  2. It melts into a slurry when exposed to air.
  3. It hardens only as the water evaporates and contracts sharply.
  4. It hardens by hydration and expands slightly. Correct answer.

Explanation

Plaster of Paris is calcium sulfate hemihydrate. When mixed with water it rehydrates to gypsum dihydrate, forming interlocking crystals and setting hard with slight expansion.

Question 32Materials, tools, armature and studio safety (clay, plaster, wax, wood, stone, metal; modelling stands and implements)

What is the main purpose of an armature in a modelled figure?

  1. To replace the need for any joining or scoring.
  2. To reduce the weight of the modelling clay by half.
  3. To provide a decorative outer surface for the finished piece.
  4. To support the modelling material and prevent slender parts collapsing. Correct answer.

Explanation

The armature is an internal skeleton of wire, wood or metal. It carries the weight of clay or wax and prevents thin ankles, limbs or raised gestures from sagging before the material sets or is cast.

Question 33Materials, tools, armature and studio safety (clay, plaster, wax, wood, stone, metal; modelling stands and implements)

Which measure most directly reduces the hazard of fine dust when smoothing set plaster or stone?

  1. Working in a warm room so the dust rises.
  2. Using a household fan to blow dust away from the bench.
  3. Wet-sanding the surface and using suitable extraction or a respirator. Correct answer.
  4. Sweeping the dust into a bin at the end of the session.

Explanation

Fine silica dust from plaster and stone can damage lungs when inhaled. Wetting the surface keeps particles out of the air, and local extraction or a suitable respirator protects the worker when dust cannot be eliminated.

Question 34Materials, tools, armature and studio safety (clay, plaster, wax, wood, stone, metal; modelling stands and implements)

At which clay stage should two sections be joined by scoring, applying slip and pressing?

  1. Slip, when the clay is a liquid suspension.
  2. Bone-dry, when the clay has lost all its moisture.
  3. Leather-hard, when it is firm but still damp. Correct answer.
  4. Bisque, after the clay has been fired once.

Explanation

Leather-hard clay is firm enough to hold its shape but still damp enough for score lines, slip and pressure to bond. Joining at slip or bone-dry stages gives weak or impossible seams.

Question 35Materials, tools, armature and studio safety (clay, plaster, wax, wood, stone, metal; modelling stands and implements)

Which procedure is correct when mixing plaster of Paris for a mould?

  1. Add water gradually to the plaster and stir vigorously throughout.
  2. Stir plaster and water continuously while adding dry plaster.
  3. Mix equal volumes of plaster and water and beat in air.
  4. Sprinkle plaster into water, then stir gently after slaking. Correct answer.

Explanation

Plaster should be sprinkled into the water so it disperses and slakes before gentle stirring. Adding water to plaster or beating air into the mix produces lumps and weak, bubbly casts.

Question 36Materials, tools, armature and studio safety (clay, plaster, wax, wood, stone, metal; modelling stands and implements)

What is a plaster rasp used for?

  1. Measuring the water-to-plaster ratio accurately.
  2. Cutting wire armature to length before modelling.
  3. Shaping and smoothing set plaster by abrasion. Correct answer.
  4. Sealing a clay model before making a mould.

Explanation

A plaster rasp is an abrasive tool with a coarse, perforated or toothed surface. It removes small amounts of set plaster and smooths or shapes a cast without the shock of a hammer and chisel.

Question 37Materials, tools, armature and studio safety (clay, plaster, wax, wood, stone, metal; modelling stands and implements)

A pointing machine is used in stone carving mainly to:

  1. Polish the finished marble surface to a high sheen.
  2. Transfer key measurements from a maquette to the stone block. Correct answer.
  3. Support the stone block while it is being moved.
  4. Inject water into the drill to cool the bit.

Explanation

A pointing machine carries measurements from a maquette to a larger stone block using adjustable rods and pointers. It helps the carver locate key points accurately while removing stone.

Question 38Materials, tools, armature and studio safety (clay, plaster, wax, wood, stone, metal; modelling stands and implements)

Why should galvanized steel be avoided for welded armatures unless zinc fume is controlled?

  1. Zinc reacts with sulphur in clay and stains the surface.
  2. Zinc coating makes the wire too soft to support clay.
  3. Zinc prevents welds from conducting heat sufficiently.
  4. Heating the zinc coating produces toxic fumes. Correct answer.

Explanation

Galvanized steel carries a zinc coating that vaporizes when welded. Inhaling zinc oxide fume can cause metal fume fever, so the coating must be removed or the welding done with proper extraction and respiratory protection.

Question 39Materials, tools, armature and studio safety (clay, plaster, wax, wood, stone, metal; modelling stands and implements)

In a wooden armature, why is a main support usually cut with its grain running lengthwise?

  1. It gives greater stiffness and resistance to splitting along the load. Correct answer.
  2. It allows the wood to flex freely in every direction under a load.
  3. It makes the timber easier to melt into the clay surface.
  4. It guarantees that the armature will never shrink or warp.

Explanation

Wood is strongest and stiffest along the grain, and a lengthwise member resists bending and splitting better than a short cross-grain piece. Load-bearing armature parts are therefore oriented with the grain following the main force.

Question 40Materials, tools, armature and studio safety (clay, plaster, wax, wood, stone, metal; modelling stands and implements)

How should rags soaked with solvent or oil-based modelling medium be stored after use?

  1. In a self-closing metal can away from heat and ignition. Correct answer.
  2. Wrapped in paper and placed beside the drying rack.
  3. Loose in an open bin so that the solvent can evaporate.
  4. Stacked on a wooden shelf until they are completely dry.

Explanation

Solvent- and oil-soaked rags can heat spontaneously as they oxidize. They should be placed in a self-closing metal can away from heat and ignition, or dried safely under supervision according to local rules.

Question 41Materials, tools, armature and studio safety (clay, plaster, wax, wood, stone, metal; modelling stands and implements)

Before modelling a figure from a block of clay, why is the clay usually wedged on a plaster or canvas surface?

  1. To make the clay harder so that it holds fine detail without support
  2. To change the clay's colour so that cracks are easier to see
  3. To add a waterproof skin that prevents the clay from drying
  4. To remove trapped air and equalize moisture in the clay Correct answer.

Explanation

Wedging, or kneading, drives out trapped air pockets and distributes moisture evenly through the clay body. If air remains, it can cause cracks or blowouts during firing, while uneven moisture can make the piece warp or dry unevenly.

Question 42Materials, tools, armature and studio safety (clay, plaster, wax, wood, stone, metal; modelling stands and implements)

Which material is commonly brushed onto a set plaster mould surface as a parting agent before a second plaster piece is cast against it?

  1. A thin coat of clean water only
  2. A coat of undiluted PVA wood glue
  3. A layer of clay slip mixed with water
  4. Soft soap or petroleum jelly Correct answer.

Explanation

A parting agent must create a barrier between the old plaster and the new plaster; soft soap solution or petroleum jelly does this effectively. Water is absorbed by the porous plaster, while clay slip and PVA glue tend to bond the new plaster to the old surface rather than release it.

Question 43Materials, tools, armature and studio safety (clay, plaster, wax, wood, stone, metal; modelling stands and implements)

Why is a double boiler preferred when melting wax for modelling or casting in the studio?

  1. Because it adds water to the wax and prevents shrinkage
  2. Because it makes the wax set harder and hold much sharper detail
  3. Because it limits overheating and keeps wax below its flash point Correct answer.
  4. Because it melts the wax much faster than direct heat

Explanation

Wax is flammable, and direct heat can raise it past its flash point or ignite the vapour above the melt. A double boiler uses a water bath to limit the temperature, so the wax melts without overheating.

Question 44Materials, tools, armature and studio safety (clay, plaster, wax, wood, stone, metal; modelling stands and implements)

In stone carving, what is the main function of a pitching tool?

  1. To knock off large waste pieces along an edge of the block Correct answer.
  2. To grind away small areas of stone with a hand-held abrasive wheel
  3. To measure the depth of carving from a plaster model
  4. To polish the finished surface of marble to a high sheen

Explanation

A pitching tool is a stout, wide-edged chisel struck with a mallet to remove large waste masses from the edge of a stone block. Fine abrasion, depth measurement and polishing are done with other tools such as a grinder, pointing machine or abrasive.

Question 45Materials, tools, armature and studio safety (clay, plaster, wax, wood, stone, metal; modelling stands and implements)

Before working on a tall clay figure mounted on a mobile modelling stand, why should the castors be locked and the load rating checked?

  1. To stop the stand rolling or tipping during modelling Correct answer.
  2. To keep the clay from drying out too quickly during the whole session
  3. To reduce the amount of fine dust produced by the modelling tools
  4. To make the armature easier to bend into the desired pose

Explanation

A tall figure raises the centre of gravity, so an unlocked castor or a stand loaded beyond its rating can allow the whole setup to roll or tip. Checking the rating and locking the castors secures the stand before pressure is applied to the clay.

Question 46Materials, tools, armature and studio safety (clay, plaster, wax, wood, stone, metal; modelling stands and implements)

Why is a length of stiff non-ferrous wire annealed before it is bent into a complex armature shape?

  1. To coat the wire with a rust-resistant layer
  2. To increase the wire's electrical conductivity for welding
  3. To soften the wire so it bends without cracking Correct answer.
  4. To make the wire spring back more strongly after bending

Explanation

Annealing relieves work-hardening by heating the metal and allowing it to cool slowly, which makes the wire ductile enough to bend without cracking. It does not apply a rust coating, increase springback, or improve conductivity.

Question 47Materials, tools, armature and studio safety (clay, plaster, wax, wood, stone, metal; modelling stands and implements)

What is a loop tool most commonly used for in clay modelling?

  1. Polishing a wax model before casting
  2. Cutting a plaster mould into two matching halves
  3. Measuring the moisture content of a clay body
  4. Hollowing and shaving away clay to refine a form Correct answer.

Explanation

A loop tool has a ribbon or wire loop at the end, and it is used to hollow, shave and refine clay forms. It is not a measuring device, a plaster saw or a wax polishing tool.

Question 48Materials, tools, armature and studio safety (clay, plaster, wax, wood, stone, metal; modelling stands and implements)

Why is the end grain of a wooden carving block often sealed before a finish is applied?

  1. Because end grain absorbs finish unevenly and dries blotchy Correct answer.
  2. Because sealing end grain makes the wood easier to carve across
  3. Because it removes the need to sand the side grain
  4. Because it prevents the wood from expanding in humid air

Explanation

End grain is much more porous than side grain, so it draws finish deeper and can dry with a darker, blotchy appearance. Sealing it balances absorption; it does not make cross-grain carving easier, stop humidity movement, or replace sanding.

Question 49Materials, tools, armature and studio safety (clay, plaster, wax, wood, stone, metal; modelling stands and implements)

In lost-wax casting, why should a wax model have walls of fairly uniform thickness?

  1. Because uniform walls make the wax model heavier than the finished metal
  2. Because uneven wax expands and contracts differently, cracking the shell Correct answer.
  3. Because thick wax walls always melt at a lower temperature than thin walls
  4. Because thin walls prevent the wax from burning out completely

Explanation

During burnout, thick and thin wax sections heat and expand at different rates, and that differential movement can crack the ceramic shell or leave wax residue. Uniform walls promote even melting and a cleaner cavity.

Question 50Materials, tools, armature and studio safety (clay, plaster, wax, wood, stone, metal; modelling stands and implements)

Why should a solid wooden or ferrous-metal armature be removable from a clay figure that is going to be fired in a kiln?

  1. Because wood and steel armatures make the clay fire at a much higher temperature
  2. Because rigid armatures resist clay shrinkage and can cause cracking Correct answer.
  3. Because armatures prevent the clay from being scored and slipped
  4. Because removable armatures are the only way to make the clay dry faster

Explanation

Clay shrinks during drying and firing, so a rigid armature that cannot be removed resists that movement and can crack the piece; wood also burns away inside the kiln. Designing the armature to be withdrawn avoids both problems.