Skip to main content
TradesAutomotive Service TechnicianAuto Body Technician
LanguagesEnglishالعربية — Arabic
PricingBlogAboutContact
Display language
Log inGet started
Practice questions · 310B G

Performs detailing and cleaning

2 questions from this exam area, each with the full explanation shown — not just the answer. Free, no account.

5% of the exam

1

When priming a stone chip that has been cleaned to bare metal, how much primer should be applied?

  1. Enough to fill the chip completely and stand above the surface, then sand it flush and leave it as the finish
  2. A thin coat covering the bare metal only, left to dry, leaving room for colour and clearAnswer
  3. None; the colour coat provides all the corrosion protection needed on a chip this small
  4. Several heavy coats so the primer is thicker than on the rest of the panel and resists stones

Why that is right

Primer's job in a chip is adhesion and corrosion protection on the bare steel, not filling. A thin coat that just covers the metal and is allowed to dry leaves the depth of the chip available for colour and clear. Primer is porous and not UV stable, so it must never be left as the exposed top layer.

Why the other options are wrong

  • A. A chip filled with primer has no colour and no gloss; exposed primer chalks and absorbs water within weeks.
  • C. Colour coats and basecoats are not formulated to bond to or protect bare steel; rust returns under the touch-up.
  • D. Heavy primer traps solvent, shrinks and leaves no room for colour; it is the opposite of a thin, controlled coat.

2

A vehicle is brought straight in from an outdoor lot at −15 °C (5 °F) for stone-chip touch-up. What should the technician do before applying any paint to the chips?

  1. Apply the paint immediately while the chips are still free of dust and before the panel can sweat
  2. Warm the chips with a propane torch for a few seconds each, then wipe and apply the colour
  3. Thin the touch-up paint with extra reducer so it flows on the cold surface and self-levels
  4. Let the vehicle reach shop temperature so the panel is dry and free of condensation, then clean the chipsAnswer

Why that is right

Paint applied to a cold panel does not flow, flash or cure properly, and a cold panel brought into warm shop air immediately sweats condensation into every chip, trapping moisture under the touch-up and starting rust. The panel must be at room temperature and dry; only then is the chip degreased and filled.

Why the other options are wrong

  • A. The chips may look clean but the metal is below the dew point; condensation forms inside them within minutes.
  • B. A torch overheats the thin paint edge, scorches the finish and can warp the panel; gentle, even warming is what is needed.
  • C. Thinning does not fix the problem; the film still goes on over moisture and cures badly on a cold substrate.

Exam-style practice written to the published Red Seal standard. These are not real exam questions — the official Red Seal sample questions are deliberately excluded from everything we publish.

Want the whole bank?

These are a sample. The full 310B bank runs to thousands of questions, every one explained, in English and Arabic.

Take the free 310B practice test See the full exam breakdown