ST0851 Pipe Welder: practice questions and mock tests
A 30-question pipe-welding test with a separate safety minimum as well as the overall pass and distinction marks.
Apprentices registered to ST0851 version 1.2 and preparing for the knowledge-test part of the Level 3 end-point assessment.
Standard
ST0851
Version
v1.2
Level
3
Exam at a glance
ST0851 · version 1.2
- Questions / papers
- 30 questions
- Time allowed
- 60 minutes
- Pass requirement
- 18/30 + 4/5 safety
- Reference policy
- Closed book
What is the ST0851 Pipe Welder test?
The ST0851 knowledge test checks the technical and safety understanding needed to prepare, control and inspect high-integrity pipe welds in line with approved information and procedures.
This page focuses on the knowledge-test method. The full end-point assessment may also include practical, observation or professional-discussion methods. Use the official assessment-plan links below to check the complete EPA.
When you take it
It is normally taken during end-point assessment, after the apprentice has completed training and passed through gateway. The employer, training provider and end-point assessment organisation agree the booking and sequence.
- 01
Training
Build the occupational knowledge, practical competence and workplace evidence.
- 02
Gateway
The employer confirms the apprentice is ready to enter end-point assessment.
- 03
Knowledge test
Sit the ST0851 multiple-choice knowledge test.
- 04
Other EPA methods
Complete the practical, observation or discussion methods specified by the assessment plan.
Try a practice question
ST0851 · Original practice material
A pipe welder is reviewing pipe dimensions and mechanical and physical properties before starting work.
Which dimension directly separates the outside diameter from the bore size of a pipe?
Choose one answer, then check it.
ST0851 exam format and scoring
These are the recorded rules for this standard version. Always compare them with the final joining instructions from your end-point assessment organisation.
Delivery
Controlled and closed book.
Question style
30 four-option multiple-choice questions with one correct answer.
Books and materials
No reference books or notes are used.
| Paper | Coverage | Questions | Time | Grade boundary |
|---|---|---|---|---|
| Knowledge test | ST0851 knowledge-test categories, including five safety questions | 30 | 60 minutes | Pass 18/30 plus at least 4/5 safetyDistinction 24/30 plus at least 4/5 safety |
What to revise for ST0851
The current published Trade Exams library for this standard contains 360 original practice questions and 40 focused fact sheets. These are revision-library counts, not official exam weightings.
Knowledge-area map
Standard reference
ST0851
Pipe joint control
- T01Welding safety
- T02Pipe materials and consumables
- T03Processes and equipment
- T04Pipe joints and positions
- T05Welding procedure control
- T06Inspection and defects
Welding safety
01Fumes, gases, fire, electricity, heat, confined work and safe systems.
Pipe materials and consumables
02Material condition, identification, filler selection, storage and handling.
Processes and equipment
03Power sources, controls, shielding, equipment checks and process choice.
Pipe joints and positions
04Preparation, fit-up, alignment, root control and positional challenges.
Welding procedure control
05WPS information, parameters, heat input, interpass control and traceability.
Inspection and defects
06Weld imperfections, acceptance awareness, visual checks and NDT purpose.
How to prepare for the ST0851 test
A practical four-stage revision sequence: understand the rules first, close topic gaps, practise decisions, then rehearse under the real time pressure.
- 1
Score safety questions separately in every mock and aim above the 4/5 minimum.
- 2
Use pipe sketches to compare preparation, root control and welding positions.
- 3
Practise reading WPS-style information and selecting parameters without notes.
- 4
Complete 30-question sessions inside 60 minutes, then review defects and their likely causes.
Revision access
Questions, mocks and fact sheets
One exam, one clear price. Access ends automatically and never renews into a subscription.
£10
30 days of access
Everything for this exam for 30 days.
One-off payment. No automatic renewal.
£20
90 days of access
Everything for this exam for 90 days.
One-off payment. No automatic renewal.
ST0851 exam questions answered
Format, timing, version, preparation and booking questions—answered from the recorded standard and assessment-plan sources.
01What is the ST0851 Pipe Welder exam?
The ST0851 knowledge test checks the technical and safety understanding needed to prepare, control and inspect high-integrity pipe welds in line with approved information and procedures. This page focuses on the knowledge-test method; the full end-point assessment may also contain practical or discussion-based methods.
02Who should use this ST0851 revision page?
Apprentices registered to ST0851 version 1.2 and preparing for the knowledge-test part of the Level 3 end-point assessment.
03When do apprentices take the ST0851 knowledge test?
It is normally taken during end-point assessment, after the apprentice has completed training and passed through gateway. The employer, training provider and end-point assessment organisation agree the booking and sequence.
04What is the ST0851 exam format?
Multiple-choice knowledge test. Controlled and closed book. 30 four-option multiple-choice questions with one correct answer.
05How many questions are there and how long does the test take?
30 questions and 60 minutes. Knowledge test: 30 questions, 60 minutes, pass 18/30 plus at least 4/5 safety.
06What is the ST0851 pass mark?
18/30 + 4/5 safety. Knowledge test: pass 18/30 plus at least 4/5 safety; distinction 24/30 plus at least 4/5 safety. The 4/5 safety minimum applies to both pass and distinction; a higher total cannot compensate for missing it.
07Is the ST0851 test open book?
Closed book. No reference books or notes are used.
08What subjects should I revise for ST0851?
The main areas are Welding safety, Pipe materials and consumables, Processes and equipment, Pipe joints and positions, Welding procedure control and Inspection and defects. The detailed coverage on this page stays within the knowledge mapped to this assessment method.
09How should I prepare for the ST0851 exam?
Score safety questions separately in every mock and aim above the 4/5 minimum. Use pipe sketches to compare preparation, root control and welding positions. Practise reading WPS-style information and selecting parameters without notes. Complete 30-question sessions inside 60 minutes, then review defects and their likely causes.
10Which version of ST0851 does this page cover?
This page and bank are for ST0851 Pipe Welder version 1.2.
11Are the Trade Exams questions official live exam questions?
No. Trade Exams' 360 practice questions and 40 fact sheets are independently authored revision material. They do not reproduce recalled, live, confidential or password-protected EPAO questions.
12Where do the ST0851 exam details come from?
The format and scope are based on the listed Skills England standard and end-point assessment sources, checked for this content pack on 2026-07-29. Always confirm late changes and booking instructions with the employer, training provider or EPAO.
13How does Trade Exams access work?
Access is a one-off £10 payment for 30 days or £20 for 90 days. It never renews automatically.
Official sources and currency
Check the standard behind this page
The format and scope were checked on 29 July 2026. Assessment arrangements can change, so confirm the final booking details with your employer, training provider or EPAO.
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