Built for engineers sitting ACS
IGEM/UP/1B Edition 4 tightness – ready from 1 Oct 2026
Pass ACS.
Keep your days.
Exam-style A-D practice with explanations and standards refs – built for van time, not classroom theory. CCN1 plus Core & 4 modules.
- Free sample15 strong CCN1 questions. No account. Instant explanations.
- CCN1 + Core & 4CENWAT, CKR1, HTR1, MET1 packs.
- Mock paceOne-at-a-time with progress and score.
- Ed4 tightnessInstallation Volume criteria, not legacy meter tables.
Under IGEM/UP/1B Edition 4, which quantity primarily sets the maximum permissible pressure drop on a domestic natural gas tightness test?
Tap A-D for green/red feedback. Full free sample ->
What you get
Revision that feels like the job.
CCN1
Core domestic gas safety
Tightness & purging (incl. Ed4 IV), unsafe situations, flues, ventilation, CPA, pipework, meters, emergency actions.
CENWAT
Central heating / water heaters
Boiler and water-heater scenarios in trade language – commissioning, combustion, and fault patterns you will meet on reassessment.
CKR1 / HTR1
Cookers & space heaters
Cooker safety devices, fires, and heater checks with GIUSP-minded classifications – not generic quiz filler.
MET1
Meters & exchange practice
Regulator behaviour, exchange sequencing, tightness after disturbance, and when to escalate meter-asset work.
CCN1
CENWAT
CKR1
HTR1
MET1
CENWAT
CKR1
HTR1
MET1