Colour filling and blending

The governing technique is blending or gradation. By changing the proportion of the two colours gradually and softening the boundary, the artist creates a smooth visual transition rather than a sudden division. Thus option D is correct. A hard edge is the opposite effect, and the remaining choices describe neither the purpose nor the result of controlled blending.

The governing concept is preparing and mixing paint on a suitable working surface. A palette is smooth, washable, and easy to control, so separate colours can be placed and blended without being absorbed. Thus, option D is correct. Cloth absorbs paint, soil is uneven and dirty, and a wooden door is an unsuitable large surface that may contain dust or absorb moisture. A palette also helps the artist use only the required quantity and keep mixtures organized.

The governing concept is testing and controlling a colour mixture before applying it to the final artwork. A small sample on separate paper reveals the mixture’s shade, thickness, coverage, and any noticeable change after drying. Therefore, option B is correct. Applying it directly could spoil a large area if the colour is too dark, pale, thick, or watery; the other choices do not provide a useful check.

The governing concept is uniform brushwork for a flat painted surface. Even strokes moving consistently in one direction distribute the colour more regularly and reduce visible patchiness, making option C correct. Irregular strokes create an uneven texture, heavy pressure may damage the paper or squeeze out excess paint, and circular strokes are not the only suitable method for covering a large flat area. Moderate, controlled movement gives better results.

The governing concept is consistency of the paint mixture. When poster colour has an even, workable thickness, each brushload spreads in a similar way and the finished area appears uniform; therefore option A is correct. Changing colour with every stroke prevents unity, a very dry brush can leave gaps and streaks, and folded paper makes the surface uneven. Consistency should be checked before and during application.

The governing concept is controlled, even application of paint. While filling a circular shape, the brush should follow the outline carefully and distribute an appropriate amount of colour inside the boundary. Option B is correct because it gives a neat edge and an even surface. Spreading outside the outline damages the shape, folding the paper can disturb the paint, and pressing too hard may create uneven marks or damage the sheet.

The governing technique is controlled brush loading. The brush should carry enough poster colour to cover the area smoothly, but not so much that paint runs, drips, or forms an uneven patch. Excess colour can be lightly removed on the palette edge before touching the paper. Thus option A is correct. A dripping load is wasteful, while no colour or dry colour cannot produce an even painted surface.

The governing concept is controlled outlining and filling. When painting a circular shape, carefully working around the edge first establishes a clean boundary and prevents the colour from crossing the outline. The remaining interior can then be filled with steady, even strokes from the edge inward. Option A is correct. Making a hole, folding the paper, or drying unused colour does not fill the shape or improve its finish.

The governing colour-theory rule is that red and yellow are primary colours whose mixture produces orange, a secondary colour. Mixing them on a clean palette helps preserve a clear hue; residue from another colour can make the result muddy. Blue and yellow produce green, black and white produce a grey value, and red with green tends to reduce saturation rather than create a clean orange. Therefore, option A is correct.

The governing concept is proper brush maintenance. When a brush stands in water for a long time, its bristles can press against the container’s bottom or sides and lose their intended shape. This may bend the hairs and spoil the pointed tip. It cannot brighten the colour, thicken paper, or lengthen the handle. Therefore, option B is the only reasonable result.

A soft blend is produced by the wet-on-wet method. When the paper or an existing colour area is still damp, fresh watercolour moves gradually into it and the boundary becomes gentle rather than sharp, so option B is correct. Dry paper tends to preserve harder edges, oil interferes with absorption, and a thick layer does not by itself create a soft transition.

The governing concept is wet-on-wet blending. On a damp surface, neighbouring watercolour washes remain mobile for a short time, allowing their edges to merge gradually and form a soft transition rather than a hard boundary. The amount of moisture must be controlled so the colours do not flood together. A black dividing line creates a sharp edge, widely separated dry colours cannot blend, and glue is not a normal watercolour medium. Thus, option A is correct.

The governing technique is controlled wet-on-wet blending. On a slightly damp surface, water allows the edges of neighbouring pigments to move and merge gradually, producing a soft transition rather than a sharp boundary. Therefore, option A is correct. A black line creates separation, completely dry paper usually preserves a hard edge, and sand is not a normal blending material for watercolour. The brush still needs controlled moisture to prevent uncontrolled spreading.

The governing concept is the wet-on-wet watercolour technique. Because the paper is damp, two still-wet pigments spread slightly and merge gradually, producing a soft transition without a sharp boundary. Therefore option B is correct. A hard black boundary would require a strong dry edge or outlining, while metallic effect and dry texture are unrelated results. The amount of water must still be controlled to avoid unwanted spreading.

The governing concept is proper care of painting tools. If a brush is left standing in water, prolonged moisture can soften or deform the bristles, and water may also weaken the adhesive or fitting that holds them. Option B is correct because bent bristles lose their intended shape and make controlled marks difficult. The brush cannot brighten paint, strengthen paper, or make the water thick. It should be rinsed and stored with the bristles supported.

The governing concept is planning and maintaining accurate lettering. A light pencil outline establishes the letter height, shape, alignment, and spacing before opaque acrylic paint is applied. It can be adjusted gently and usually becomes covered by the final colour. Dipping the paper may damage or warp it, adding oil is unsuitable for acrylic paint, and cutting the brush reduces its usefulness. Hence, option A is correct.

The governing tool-selection principle is to match brush shape and size to the area being painted. A broad flat brush carries enough paint and covers a wide region with fewer, more even strokes, so option C is correct. A very thin brush is better for lines and details, a wire brush is not a normal paintbrush for smooth coverage, and a brush without bristles cannot apply paint effectively.

The governing technique for filling a flat area is controlled, even application. Brush strokes should be reasonably uniform and should overlap slightly so that the colour forms a continuous layer without obvious gaps, streaks, or patches. Heavy pressure can leave unwanted marks, while irregular or exclusively circular strokes do not ensure an even surface. Thus option A is the most suitable answer.

The governing concept is controlled colour filling. Acrylic paint should be distributed evenly inside the drawn boundary so the circular form has a clean outline, consistent coverage, and a neat appearance. Therefore, option C is correct. Spreading beyond the boundary damages the shape, excessive water can reduce body and control, and pressing too hard may roughen the surface or create uneven marks. Short, controlled strokes help near the edge.

Dry-brush is a brush technique in which the brush carries very little, relatively thick paint and is moved lightly across the surface. Because there is little moisture and pigment, the bristles leave broken, scratchy, or textured marks instead of a smooth solid layer. Very watery paint would produce a different wash effect, while a full container and glue are unsuitable. Thus, option B is correct.

Using a sponge is a surface-application brush technique that transfers paint through many small, irregular contact points. This can produce a speckled, stippled, mottled, or uneven texture, useful for backgrounds and natural surfaces. It is not limited to making a straight line or handwriting, and it cannot create actual metal engraving. Therefore, option C accurately identifies the effect.

Gradation is the controlled and gradual change of colour, tone or value from one degree to another, such as moving from dark to light without a harsh boundary. Therefore option B is correct. Printing transfers an image, scratching removes or marks a surface, and drawing creates lines or forms; none of these terms specifically names a smooth tonal transition in paint.

The governing concept is colour value and tinting. Adding white to an acrylic colour raises its value and creates a tint, making the colour appear lighter while retaining a related hue. Black does the opposite by creating a shade, and a complementary colour generally dulls or neutralises the mixture rather than simply lightening it. Varnish may change surface sheen or transparency but is not the standard colour-lightening method. Therefore option D is correct.

The governing concept is brush maintenance and control of the working tip. After washing, gently reshaping the damp bristles helps them dry in their intended form instead of splaying or bending. A well-shaped tip produces cleaner lines, edges, and controlled strokes during the next use. This action does not dry paint, waterproof the handle, or make bristles harder; excessive stiffness can reduce control. Hence option A is correct.

The governing concept is colour transition. Blending means gradually merging adjacent colours so that the boundary changes smoothly rather than appearing as a hard, sudden edge. When one colour is worked into the next with controlled brush movement, intermediate tones may appear, making option B correct. Printing transfers an image, cutting removes material, and outlining draws a boundary; none describes gradual colour merging.