Fire Fighting in Canada - Truck Checks: Apparatus 101: Test your skills by Don Henry - First 50 answers
These first 20 questions deal with the Design
and Performance objectives.
1. Fill in the blanks: Apparatus that can flow water under pressure while moving is referred to __Pump _ and _Roll.
2. Define the term “draft” as it applies to fire apparatus.
When the physical level of the water supply is below the
center of the pump impeller eye it will be necessary to draft water into the
pump. This is done reducing the atmosphere pressure in the body of the fire
pump and draft hoses. Atmospheric pressure on top of the pond or lake, push’s
the water up into the fire pump.
3. Define the term “residual” water pressure as it applies to fire apparatus and fire hydrants.
Residual pressure is the
pressure that is left. For example when testing a fire hydrant it is important
to know and record the pressure reading while water is flowing from an outlet
of another hydrant other than the
hydrant being flow tested.
4. Define the term “static” water pressure as it applies to fire apparatus.
Static pressure refers to the pressure reading before the
water begin to flow. Static pressure can be caused by a column of water
5. GVWR stands for:
Gross Vehicle Weight Rating
6. GAWR stands for:
Gross Axle Weight Rating
7. GCWR stands for:
Gross Combination Weight Rating
8. A soft suction hose can be used to supply a fire pumper directly from a lake or pond.
a. true
b. false
9. A gauge located on the pump panel that can read both a vacuum and a pressure is called:
a. twin gauge
b. double gauge
c. vacuum gauge
d. compound gauge
10. The term “maximum governed speed” refers to the:
a. maximum engine r.p.m.
b. engine high idle
c. maximum fire pump shaft speed
d. fastest forward speed
e. both a and b
The following questions 11 to 20 refer to NFPA
1901, 2009 Edition:
11. Service brakes must be able to stop a fully loaded apparatus at a speed of 32 kph (20 mph) in a distance not to exceed:
a. 10.7 metres( 35 ft)
b. 15 metres ( 49.2 ft)
c. 20 metres ( 65.2 ft)
d. 4 times the length of the truck
12. To be considered an initial attack pumper, a pumper must have a pump size of at least:
a. 750
litres (198 gallons)
b. 1000 litres ( 250 gallons)
c. 1250 litres (330 gallons)
d. 2000 litres (528 gallons)
13. The apparatus shall be able to maintain a speed of at least 32 kph (20 mph) on a grade of up to _6________%.
14. Who determines the maximum engine operating temperature?
a. fire department
b. engine manufacturer
c. apparatus manufacturer
15. The pump to tank fill line on pumps of more than 3785 L ( 1000 gallons) shall be of at least:
a. 300 mm (12 in.)
b. 200 mm (8 in.)
c. 100 mm (4 in.)
d. 50 mm (2 in.)
16. Non-driving steering axles must be capable of a minimum angle of how many degrees?
a. 15
b. 20
c. 25
d. 30
17. Pump water intake valves (excluding tank to pump) must be gated with slow moving valves if they are of what size or larger?
a. 76 mm (3 in.)
b. 65 mm (2.5 in.)
c. 100 mm (4 in.)
d. any intake valve
18. The engine’s fuel tank must hold enough fuel for:
a. 2.5 hours of pumping @ 1035 kPa (150 p.s.i.)
b. 3 hours of pumping @ 1400 kPa (200 p.s.i.)
c. 1 hour of pumping @ 1035 kPa (150 p.s.i.)
d. 3 hours of pumping @ 1035 kPa (150 p.s.i.)
19. By design the braking system must hold a fully loaded vehicle on a grade percent of at least:
a. 7%
b. 10%
c. 20%
d. 25%
20. All fully loaded apparatus shall be able to attain a minimum top speed on a level road of at least:
a. 80 kph (50 mph)
b. 105 kph (65 mph)
c. 88 kph (55 mph)
d. 72 kph (45 mph)
These 20 questions relate to the objects of
the Fire pumps
21. When operating the fire pump in the “series/pressure” operation of a two-stage pump, the pump will deliver:
a. double the pressure, half the volume of water
b. half the pressure, double the volume of water
c. double the pressure, double the volume of
water
d. half the volume, half the pressure of water
22. When operating the fire pump in the “volume/parallel” operation of a two-stage pump, the pump will deliver:
a. double the pressure, half the volume of water
b. half the pressure, double the volume of water
c. double the pressure, double the volume of water
d. half the volume, half the pressure of water
23. A pumper has to be subjected to a strong water hammer. The master pump gauge will not return to zero but reads 100 kPa. (14.5 psi) You should:
a. recalibrate the gauge
b. replace the gauge
c. advise the operators to just subtract 100 kPa ( 14.5 psi) from all readings
d. water hammers the fire pump with a reverse flow of water to recenter the gauge
24. Technician A wants to adjust a fire pump packing when operating under pressure and flow until no water drips from the packing.. Technician B says that pump packing can be adjusted with only static water pressure from the truck’s water tanks. Who is correct?
a. Technician A
b. Technician B
c. both technicians
d. neither technician
25. The most common reason for failing a fire pump service test during the high pressure, low flow is:
a. engine low on power
b. excessive wear (clearance) between the
impeller hub and wear ring
c. transmission slipping in low gear
d. transmission oil overheating
e. pump losing prime
26. A pitot gauge is used to measure what?
a. engine oil pressure
b. water pump flow during a flow test
c. air flow rates
d. is used to measure small pilots
27. The dry vacuum test is performed the first time with:
a. intake suction hose in the water source (pond, lake) and open
b. discharge valves open but capped
c. discharge valves closed but capped on tight as possible
d. intake ports capped, but intake valves open
e. intake suction hose connected but not capped
28. A mechanical r.p.m. counter on the fire pump transfer case reads excessively different than the engine r.p.m. on the pump panel during pumping. This is:
a. This is normal, you often have to multiply by
a factor of ten times.
b. caused because the slippage in the transmission
c. caused because one of the gauges is defective
d. because the transmission is in overdrive when pumping
e. both
b and c
29. The picture below shows the pump in:
a. parallel/volume
b. series/pressure
30. The picture below shows the pump in:
a. parallel/volume
b. series/pressure
The following questions 31 to refer to NFPA 1901, 2009 Edition:
31. At less than 2000 feet above sea level, a priming device must be able to reach a maximum of how many inches of mercury during the vacuum test
a. 18 inches
b. 20 inches
c. 22 inches
d. 25 inches
32. The priming vacuum must be held for a minimum of how many minutes?
a. 2 minutes
b. 3 minutes
c. 5 minutes
d. no time is referred to in the standard
33. During the vacuum test, it is permissible to lose some vacuum. What is the maximum allowable amount?
a. 5 inches
b. 10 inches
c. 14.7 inches
d. All of the vacuum
34. Priming devices on new fire pumps must now to able to operate with what type of lubrication?
a. no lubrication
b. biodegradable nontoxic lubricant
c. 10 weight motor oil
d. synthetic motor oil
e. a or b
35. For pumps of 4732 L/min. (1250 gpm) or less, the time to prime from draft shall not exceed:
a. 15 seconds
b. 30 seconds
c. 45 seconds
d. 60 seconds
36. For pumps larger than 6000 L/min. (1500 gpm), the time to prime is extended by:
a. 10 seconds
b. 15 seconds
c. 30 seconds
d. 45 seconds
37. All
pumps must have a working pressure control system. This system must not allow the pressure to
rise by more than what amount when a discharge valve is closed no more rapidly than in 3 seconds
and not more slowly than in 10 seconds?
a. 30 p.s.i.
b. 10 p.s.i.
c. 45 p.s.i.
d. 12 p.s.i.
38. During the above test, the pump pressure must
a. 70 psi to 300
psi net pump pressure
b. 90 psi to 320 psi net pump pressure
c. 100 psi to 350 psi
d. Makes not difference
39. The overload pump test shall be conducted for:
a. 1138 kPa (165 p.s.i.) for 10 minutes
b. 1035 kPa (150 p.s.i.) for 15 minutes
c. 1380 kPa (200 p.s.i.) for 10 minutes
d. there is no such test, overload test is for springs
40. During the annual service test, is it permissible to remove engine covers, raise hoods, or remove panels from the truck?
a. yes
b. no
c. only if you need to keep the engine from overheating
The following questions 41 to 60 deal with the Electrical objectives
41. The normal open cell voltage (OCV) for a six cell battery after the surface charge has been removed is:
a. 12.0 to 13.8 volts
b. 12.4 to 12.8 volts
c. 13.0 to 14.4 volts
d. never lower than 9.6 volts
42. Define the following Cold Cranking amps (CCA) in regards to batteries.
It is defined as the current that the battery can deliver
for 30 seconds and maintain a terminal voltage greater than or equal to 1.20
volts per cell, at 0 degrees Fahrenheit (-18Celsius), when the battery is new
and fully charged. This is often confused with the test that is done at ½ the CCA for 15 seconds
and not falling below 9.6 volts
43. Define reserve capacity (RC) in regards to batteries.
It
is the number of minutes at which the battery can be discharged at 25 Amps and
maintain a terminal voltage higher than 1.75 volts per cell, on a new, fully
charged battery at 80degrees Fahrenheit (27 C).
44. Why is RC more important to a fire truck than CCA?
a. because fire trucks start in warm fire halls
b. because if the alternator fails at a fire, you want to know how long you can operate with only the batteries
c. because fire trucks are easy to boost
d. both a and b
e. both a and c
45. Define voltage drop.
Voltage drop is the reduction in voltage in an elecrtial circuit between the source and load
46. What is the purpose of a load shed device?
a. to shut off excessive loads as battery voltage increases
b. to shut off excessive loads as battery
voltage decreases
c. to turn on loads as battery voltage decreases
47. An alternator has a lower than normal amperage output. The technician suspects a defective diode. If one defective diode was open, the alternator output would be:
a. 10% less
b. 30% less
c. 60% less
d. no effect
48. Wire resistance is effected by:
a. the length of the wire
b. the diameter of the wire
c. the material the wire is made of
d. the temperature of the wire
e. all of the above
49. In a parallel circuit, adding more loads will:
a. decrease circuit resistant
b. increase circuit resistance
c. have no effect
d. depend if the load is AC or DC
50. On modern electronic engine, it may be possible to program into the computer an engine shut-down or derate if oil or water temperature gets too high or oil pressure gets too low. For fire apparatus these devices?
a. these shut-downs must be enabled
b. these shut-downs may be enabled
c. these shut-downs may be disabled
d. these shut-downs must be disabled