Examination 1 Flashcards
Batteries produce explosive ________ gas when being charged
Hydrogen
An ammeter measures
Amount of current being taken from and flowing from battery
In an acceptance test, a fully loaded pumper must be able to accelerate to 35 mph in ______ seconds
25
The dry vaccum test requires a reading at the end of 5 minutes during which no more than _____ inches of vaccum should be lost.
10
Engine brakes, which assist in braking, are activated when
Pressure is released from the accelerator
The angle from the rear point of ground contact of the rear tire to any projection of the apparatus behind the rear axle is considered
The angle of departure
The engine brake and retarder are activated when:
Pressure is released from the accelerator
The 50% pump capacity test is conducted at a net pump pressure of:
250 psi for 10 minutes
When priming, water enters the pump because:
Atmospheric pressure forces it into the pump
Minimum pipe used in residential areas
6”
As a standard practice, it is undesirable to reduce incoming supply pressure below _____ psi
20
A hydrant with the largest capacity will be one that is connected to:
Primary feeder
A 2 1/2” fog nozzle flowing 225 GPM at a pressure of 100 psi will have a reaction of approximately ______ pounds
114 pounds
A good method for determining lift in a FD pump is that for each ______of indicated vacuum, wAter will rise _____
Inch, one foot
A ladder pipe with a 2” tip at 80 psi nozzle pressure will have approximately _______ pounds of nozzle reaction.
500
