411.Which type of paint is mostly preferred at present?
(a)In base coat and clear coat
(b)Water borne
(c)Solvent base
(d)In polyurethane
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412.Which technique is used to dry waterborne paint?
(a)Airflow
(b)Dry by oven
(c)Dry by light
(d)Dry by shadow
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413.What is N.C paint?
(a)Fast air drying paint
(b)Slow air drying paint
(c)Stoving bake paint
(d)Water borne paint
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414.Which putty is mostly used as a filler while repainting the car body?
(a)Enamel putty
(b)Polyester putty
(c)N.C putty
(d)Wall putty
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415.Which is the first layer of automobile repainting?
(a)Primer coating
(b)Paint spraying
(c)Putty filling
(d)Surface coating
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416.Where the grey surface applied in automobile painting?
(a)On surface coat
(b)On the metal
(c)On base coat
(d)On primer coat
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417.What is the total thickness of automotive painting finish?
(a)80 to 90 micron
(b)50 to 60 micron
(c)40 to 50 micron
(d)100 micron
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418.What is the time of flash-off before placing the job in an oven?
(a)05 to 07 seconds
(b)10 to 15 minutes
(c)05 to 07 minutes
(d)10 to 15 seconds
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419.Which grade water proof paper is used for sanding before polishing the top coat?
(a)1500 to 2000 grits
(b)180 to 320 grits
(c)400 to 800 grits
(d)800 to 1200 grits
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420.How many layers of painted surface to be exposed by wet sanding to spot repair, if the scratches are till the base coat?
(a)Three layers
(b)Two layers
(c)One layer
(d)Four layers
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421.What is done after the automotive body primed and putty applied?
(a)Apply the surface
(b)Apply paint
(c)Apply wax polish
(d)Apply top coat
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422.What is the next step after painting and baking the finish coat on a car?
(a)Repainting
(b)Surface coating
(c)Polishing
(d)Priming
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423.What is the first step of work for repainting automotive vehicle?
(a)Surface coating
(b)Old paint removing
(c)Priming
(d)Polishing
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424.How is uneven sanding prevented?
(a)By using long even strokes
(b)By keeping the paper well soaked
(c)By changing the paper grade often
(d)By using a sanding block
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425.What is the use of putty?
(a)To level surface damage
(b)To remove paint
(c)For drying primer
(d)For drying surface
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426.What is the major reason for paint rundown and sagging?
(a)Low air pressure
(b)High pressure
(c)Thick coat of paint applied at a time
(d)Incorrect thinner use
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427.What is the cause of chalking defect on the painted surface?
(a)Occurs due to dust in the atmosphere
(b)Occurs due to excessive sunlight, moisture
(c)Occurs due to water flow
(d)Occurs due to cold weather
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428.Why does a mottling defect occur on a metallic base coat while painting?
(a)High air pressure to spray gun
(b)High viscosity of paint
(c)Spray gun hold too far from the surface
(d)Spray gun hold too close to the surface
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429.What should be done to remove minor dirt inclusions from top coat paint?
(a)Do sanding and polishing and then apply top coat
(b)Remove old paint and repaint with proper system
(c)Do scrapping and repaint with proper system
(d)Burn paint and repaint with proper system
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430.Which painting defect occurs if there is moisture between primer and top coat?
(a)Chipping
(b)Blistering
(c)Sagging
(d)Pin holes
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