Section 4 URE Flashcards
(24 cards)
What component on the filter separator prevents pressure surges from damaging dispensing pressure control systems?
Air eliminator
What type of meter is used on most fuel dispensing systems
No-rotor positive displacement
What type of lubricant is used to lubricate the PTO on a fuel dispensing system?
Ninety-weight gear oil
What component found on R-11 and R-12 prevents the auxiliary throttle from operating unless the PTO is engaged?
Throttle interlock system
During bottom loading operations what should occur when the signal to the bottom loading optic probe is lost?
The electronic control module cuts power to the bottom loading electronic air solenoid
What is the lifting force of a liquid called
Buoyancy
Which of the following would indicate velocity of flow?
Feet per second
Fuel systems are designed so that normal operating fuel flow will not exceed what?
12 feet per second
A complete cycle of pressure waves and reversals of flow during hydraulic shock occupies the time required for
Two round trips
The intensity if the excess pressure in a water-hammer wave depends on the
Amount of extinguished velocity
Which of the following types of measurements may be used to express pressure?
Pounds per square inch
The standard measure for atmospheric pressure is equal to how many psi?
14.7
What term is used to describe the total pressure acting as a gas?
Absolute pressure
How do the charges of protons and electrons differ?
Protons have positive charge, electrons have negative charges
The uniform movement of electrons in a specific direction is called
Electric current
The shell of the valence electrons that determines whether a material is a good or poor conductor is the
Outer most shell
A positive ion is an atom that
Lost an electron and has more protons
What is the unit for electrical power?
Watts
A 3 horsepower engine consumes how many watts of power?
2238 W
What items are required to construct an electromagnet?
Coil of wire, core material, current flow.
What are the two most common methods of producing voltage?
Chemical and mechanical
What types of current flow cannot be transformed from a higher voltage to a lower voltage?
Direct Current
What are the three things needed to produce voltage by the principle of electromagnetic induction?
Magnetic field, conductor, and relative motion
Which of the following is not a type of positive displacement pump?
Centrifugal
