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100+ Free Fitter Trade Test Practice Questions

South Africa Artisan Trade Test — Fitter (and Turner) practice questions are available now; exam metadata is being verified.

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2026 Statistics

Key Facts: Fitter Trade Test Exam

100

Practice Questions

OpenExamPrep

QCTO / NAMB

Governing Bodies

QCTO

~R500

INDLELA Trade-Test Fee

INDLELA

N2 + 3 yrs

Typical Entry Requirement

QCTO

Competency-based

Assessment Type

NAMB

Fitter & Turner

Designated Trade

QCTO

The Fitter (and Turner) trade test is South Africa's national artisan assessment for the fitting and machining trade, administered through accredited QCTO trade test centres and moderated by the NAMB. It is a competency-based practical and theory assessment conducted over several days, not a fixed-question written paper, so each task must be judged competent. Entry requires an N2 Certificate with relevant trade theory (Engineering Drawing and Trade Theory) and around three years of workplace experience, and the trade-test fee at INDLELA is approximately R500 (private centre preparation fees vary). The underpinning theory spans engineering drawing, metrology, machining on the lathe/mill/drill, fits and tolerances, assembly and fault-finding, materials and heat treatment, bearings and seals, and workshop safety. This free prep includes 100 research-based practice questions with explanations and an AI tutor.

Sample Fitter Trade Test Practice Questions

Try these sample questions to test your Fitter Trade Test exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1On a South African engineering drawing, third-angle orthographic projection is indicated by a symbol showing the end view of a truncated cone. Where is the top view placed relative to the front view in third-angle projection?
A.Below the front view
B.Above the front view
C.To the left of the front view
D.Behind the front view
Explanation: In third-angle projection (the method commonly taught in SA fitting and machining N2), each view is placed on the same side as the surface being viewed, so the top view sits directly above the front view. SANS 10111/ISO drawings use a defined projection symbol to declare the method.
2A drawing dimension is shown as 50 H7. In the ISO system of limits and fits used on SA engineering drawings, what does the capital letter H tell the fitter?
A.It is a shaft with the upper deviation at zero
B.It is a hole with the lower deviation at zero (basic size as the minimum)
C.It is the tolerance grade number
D.It indicates a transition fit
Explanation: In ISO 286, a capital letter denotes a hole and the H position places the lower deviation at zero, so the hole's minimum size equals the basic size (50 mm) and tolerance is added above. The number 7 is the IT tolerance grade. H is the standard basis for the hole-basis system.
3What is the standard accuracy (smallest division) of a metric external micrometer with a 0.5 mm pitch spindle and a 50-division thimble?
A.0.1 mm
B.0.01 mm
C.0.001 mm
D.0.02 mm
Explanation: One full turn of the thimble advances the spindle 0.5 mm (the pitch). With 50 equal divisions on the thimble, each division equals 0.5 ÷ 50 = 0.01 mm, so a standard metric micrometer reads to 0.01 mm. A vernier micrometer adds a scale to read to 0.001 mm.
4A metric vernier caliper has a least count of 0.02 mm. The main scale reads 24 mm and the 7th vernier division coincides with a main-scale line. What is the measured dimension?
A.24.07 mm
B.24.14 mm
C.24.70 mm
D.24.35 mm
Explanation: The reading is the main-scale value plus (coinciding vernier division x least count): 24 + (7 x 0.02) = 24 + 0.14 = 24.14 mm. The vernier division that lines up with a main-scale graduation gives the fractional part.
5In the fit designation 40 H7/s6, what class of fit is produced?
A.Clearance fit
B.Interference (force/press) fit
C.Transition fit
D.Running fit
Explanation: With the hole H7 and a shaft in the s range, the shaft is always larger than the hole, giving an interference (press or force) fit. Shaft letters from p upward (p, r, s, t, u) on a hole-basis system produce interference, requiring pressing or shrink-fitting to assemble.
6On a sectioned assembly drawing, two adjacent parts are cross-hatched. What is the correct convention for distinguishing them?
A.Hatch both parts with lines at the same angle and spacing
B.Hatch the parts with section lines at different angles or spacings
C.Leave one part un-hatched
D.Hatch only the larger part
Explanation: Per SANS/ISO sectioning conventions, adjacent components in a section are differentiated by drawing the hatching at different angles (commonly 45 degrees one way and 45 degrees the other) or at different spacings, so the fitter can read where one part ends and the next begins.
7When turning mild steel at a recommended cutting speed of 30 m/min on a workpiece of 50 mm diameter, what is the approximate spindle speed?
A.95 r/min
B.191 r/min
C.382 r/min
D.600 r/min
Explanation: Spindle speed N = (1000 x V) / (pi x D) = (1000 x 30) / (3.142 x 50) = 30000 / 157.1 = 191 r/min. Cutting speed (m/min) is fixed by the material; the RPM is calculated from the diameter being machined.
8Which lathe operation produces a conical (tapered) surface by setting the compound rest (top slide) to half the included angle of the taper?
A.Knurling
B.Taper turning with the compound slide
C.Parting off
D.Facing
Explanation: Short, steep tapers are cut by swivelling the compound (top) slide to half the included angle and feeding by hand along the slide. The half-angle setting is used because the angle is measured from the centre line of the workpiece.
9What is the correct tapping drill size for an M10 x 1.5 ISO metric coarse thread?
A.10.0 mm
B.8.5 mm
C.9.0 mm
D.8.0 mm
Explanation: The tapping drill for a metric thread is approximately the nominal diameter minus the pitch: 10 - 1.5 = 8.5 mm. This leaves the correct minor diameter so the tap can cut full threads without excessive torque or breakage.
10A drilling machine is fitted with a drill that must run at 30 m/min cutting speed in a 10 mm diameter hole. What spindle speed is required (to the nearest r/min)?
A.480 r/min
B.955 r/min
C.1910 r/min
D.300 r/min
Explanation: N = (1000 x V) / (pi x D) = (1000 x 30) / (3.142 x 10) = 30000 / 31.42 = 955 r/min. The same formula applies to drilling as to turning, using the drill diameter.

About the Fitter Trade Test Practice Questions

Verified exam format metadata for South Africa Artisan Trade Test — Fitter (and Turner) is pending. The practice questions above remain available while official exam length, timing, passing score, fee, and administrator details are reviewed.