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Exam (elaborations)
CIRO TEST QUESTIONS AND ANSWERS 2025/2026
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---6December 20252025/2026A
- What is the lowest level in PPM at which ammonia is generally detectable 
A. 4 PPM 
B. 5 PPM 
C. 2 PPM 
D. 8 PPM - ANSWERS 
 
Which gas is suitable for leak checking a modified pipe section of an ammonia system 
A. Sulfur dioxide 
B. R-22 
C. Dry nitrogen 
D. R-414b - ANSWERS 
 
Which of these is true for a shell and tube condenser 
A. Water evaporates in the tubes 
B. Refrigerant flows through the tubes 
C. Water flows through the shell 
D. Refrigerant flows around the tubes - ANSWERS 
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