DC 3RD CLASS EXAMINATION TEST
QUESTIONS AND FULL SOLUTIONS GRADED
A+
◉ PARAMETERS. Answer: INITIAL EFFECTIVE RANGE
15 FEET
• DECREASES WITH USE
- LASTS 60 SECONDS
CONTINUOUS USE
◉ PORTABLE EXTINGUISHERS. Answer: TWO SIZES AVAILABLE
- 18 POUND
• RANGE 19 FEET
• LASTS 10 SECONDS
- 27 POUND
• RANGE 21 FEET
• LASTS 11 SECONDS
◉ PORTABLE EXTINGUISHERS. Answer: SAFETY PRECAUTIONS
- 15 Ibs CO, EXTINGUISHER
• WEIGHS AROUND 48 Ibs.
, - DO NOT LEAVE CYLINDER
UNATTENDED IN THE UPRIGHT POSITION
• MISSILE HAZARD
- RUPTURE DISK SET
BETWEEN 2650-3000 PSI
• DISCHARGES CO, DUE TO EXCESSIVE PRESSURE
- KEEP CYLINDER
GROUNDED
- HOLD BY HANDLE NOT HORN
◉ PORTABLE EXTINGUISHER:. Answer: USE OF A CO,
EXTINGUISHER
- GROUND THE CO, CYLINDER TO THE DECK
- EFFECTIVE RANGE 4-6 FEET FROM END OF HORN
- APPROXIMATELY 35 SECONDS (CONTINUOUS USE)
◉ INSTALLED FES. Answer: ACTUATION SYSTEM
TIME DELAY BYPASS VALVE
- ACTIVATED IN THE EVENT OF A TIME DELAY FAILURE
- MANUALLY OPERATED
• PERSONNEL MUST WAIT THE ALLOTTED TIME DELAY
i.e. 30 SECONDS)
QUESTIONS AND FULL SOLUTIONS GRADED
A+
◉ PARAMETERS. Answer: INITIAL EFFECTIVE RANGE
15 FEET
• DECREASES WITH USE
- LASTS 60 SECONDS
CONTINUOUS USE
◉ PORTABLE EXTINGUISHERS. Answer: TWO SIZES AVAILABLE
- 18 POUND
• RANGE 19 FEET
• LASTS 10 SECONDS
- 27 POUND
• RANGE 21 FEET
• LASTS 11 SECONDS
◉ PORTABLE EXTINGUISHERS. Answer: SAFETY PRECAUTIONS
- 15 Ibs CO, EXTINGUISHER
• WEIGHS AROUND 48 Ibs.
, - DO NOT LEAVE CYLINDER
UNATTENDED IN THE UPRIGHT POSITION
• MISSILE HAZARD
- RUPTURE DISK SET
BETWEEN 2650-3000 PSI
• DISCHARGES CO, DUE TO EXCESSIVE PRESSURE
- KEEP CYLINDER
GROUNDED
- HOLD BY HANDLE NOT HORN
◉ PORTABLE EXTINGUISHER:. Answer: USE OF A CO,
EXTINGUISHER
- GROUND THE CO, CYLINDER TO THE DECK
- EFFECTIVE RANGE 4-6 FEET FROM END OF HORN
- APPROXIMATELY 35 SECONDS (CONTINUOUS USE)
◉ INSTALLED FES. Answer: ACTUATION SYSTEM
TIME DELAY BYPASS VALVE
- ACTIVATED IN THE EVENT OF A TIME DELAY FAILURE
- MANUALLY OPERATED
• PERSONNEL MUST WAIT THE ALLOTTED TIME DELAY
i.e. 30 SECONDS)
