Here’s your API 510 30-second speed drill set—built to force instant recognition, not calculation comfort. In the real exam, this is what separates “finished on time” from “ran out of time.”
⏱️ Rule:
- You get 30 seconds per question
- If stuck → skip immediately
- No calculator delays beyond basic arithmetic
⚡ SECTION 1 — INSTANT CALCULATION (Q1–Q10)
Q1
Thickness: 0.500 in → 0.350 in over 5 years
Corrosion rate?
Q2
tactual = 0.300 in, tmin = 0.200 in
CR = 0.025 in/yr
Remaining life?
Q3
Remaining life = 8 years
Inspection interval?
Q4
10 ft water head pressure?
Q5
0.600 → 0.450 in thickness loss
% loss?
Q6
If corrosion rate increases, remaining life:
A) Increases
B) Decreases
C) Stays same
D) Doubles
Q7
RL = 4 years → max inspection interval?
Q8
0.400 → 0.320 in over 4 years
CR?
Q9
Which affects MAWP MOST?
A) Color of vessel
B) Thickness
C) Paint type
D) Temperature only
Q10
0.433 × h is used for:
A) Stress
B) Hydrostatic pressure
C) Corrosion rate
D) Weld efficiency
⚡ SECTION 2 — CODE RECOGNITION (Q11–Q20)
Q11
MAWP formula is found in:
A) UG-27
B) UG-99
C) UW-12
D) API 571
Q12
Joint efficiency is in:
A) UG-32
B) UW-12
C) UG-27
D) API 510 §9
Q13
Wet H₂S causes:
- A) CUI
B) SSC
C) Erosion
D) Thermal fatigue
Q14
RT detects:
A) Surface cracks only
B) Internal defects
C) Thickness only
D) Corrosion rate
Q15
UT is used for:
A) Visual inspection
B) Thickness measurement
C) Paint inspection
D) Weld coloring
Q16
Repair vs alteration:
Replacing nozzle same size =
A) Alteration
B) Repair
C) Design change
D) Failure
Q17
CUI occurs under:
A) Paint only
B) Insulation
C) Pressure
D) Welding
Q18
API 510 Section 5 covers:
A) Welding
B) Inspection intervals
C) Corrosion rate
D) Heat treatment
Q19
UG-99 relates to:
A) Corrosion
B) Hydrotest
C) Welding
D) Inspection
Q20
Lowest joint efficiency occurs when:
A) Full RT
B) Spot RT
C) No RT
D) PWHT
⚡ SECTION 3 — RAPID DECISION (Q21–Q30)
Q21
If stuck >30 sec:
A) Keep solving
B) Skip
C) Re-read repeatedly
D) Panic
Q22
Best exam strategy:
A) Slow accuracy
B) Fast skipping
C) Deep reading everything
D) No guessing
Q23
Remaining life rule:
A) RL × 2
B) RL ÷ 2
C) RL + 2
D) RL × 10
Q24
MAWP increases when:
A) Thickness increases
B) Thickness decreases
C) Corrosion increases
D) Radius increases
Q25
MT detects:
A) Internal flaws
B) Surface cracks
C) Thickness
D) Pressure
Q26
PT detects:
A) Subsurface flaws
B) Surface cracks
C) Internal voids
D) Stress
Q27
Inspection interval is based on:
A) Corrosion rate
B) Remaining life
C) Paint condition
D) Weld color
Q28
Best first exam move:
A) Code reading
B) Easy questions
C) Hard MAWP
D) Guess randomly
Q29
If unsure, best action:
A) Skip
B) Spend 10 min
C) Recalculate endlessly
D) Leave blank
Q30
Final exam goal:
A) Perfect accuracy
B) Maximum attempt rate
C) Slow reading
D) Deep code study
🧠 SCORING RULE (VERY IMPORTANT)
After finishing:
- 🟢 25–30 correct → strong exam readiness
- 🟡 18–24 → borderline but passable
- 🔴 <18 → speed + recognition issue
⚡ WHAT THIS DRILL BUILDS
- Instant formula recall
- Code location reflex
- Skip discipline
- Panic resistance
- Fast elimination thinking
🚀 ONE-LINE EXAM RULE
“If I don’t see it in 10 seconds, I don’t stay on it.”
