Question

Draeger 174 does not contain

• A. By-pass valve
• B. Breathing bag
• C. CO$_2$ absorbent
• D. Coolant

Hint:

The Draeger 174 is a vital rescue tool in mines, providing up to 4 hours of breathable air in emergencies.

Answer 1

The Correct Option is D

The Draeger 174 is a type of self-contained breathing apparatus (SCBA) used in mining for rescue operations, providing breathable air in toxic environments. It typically includes a by-pass valve (for manual air supply control), a breathing bag (to store exhaled air and manage airflow), and a CO$_2$ absorbent (to remove carbon dioxide from exhaled air). However, the Draeger 174 does not typically contain a coolant, as cooling systems are not a standard feature in this model, unlike some other advanced SCBAs designed for prolonged use in high-temperature environments. Thus, the correct answer is Coolant.