plumbing science Flashcards
unit of watts
w
unit of joules
j
unit voltage
v
unit of current
i
unit of resistance
r
what is AC
alternating current
what is DC
direct current
what is watts the measure of
power
what is joules the measure of
energy
where does alternating current come from
mains
where does direct current come from
batteries
how to work out watts
amps x voltage
how to work out voltage
current x resistance
how to work out amps
watts / voltage
equation for ohms law
current x voltage x resistance
how to work out resistance
voltage / current
symbol for DC
2 lines with one dotted
how to work out volts
watts / amps
what does the cathode eat away
the anode
what is an MCB
mini circuit breaker
what is an RCD
residual circuit breaker
what is an RCBO
residual current breaker with overload
what are MCB and fuses used for
to protect the circuit and appliance
what does the consumer unit contain
all MCBs, residual current device, RCDs and main Isolater
what is the basic principle behind Newtons first law of motion
an object will remain in motion unless acted upon by an external force
in a mechanical engineering system, what does the term velocity refer to
speed of an object in a specific direction
in a hydraulic system, pressure is generally measured in what unit
pascals
what is the primary difference between force and pressure
force is measured in newtons
pressure in pascals
what material is commonly used for water pipes due to its durability and resistance to corrosion
copper
which type of energy conversion is commonly found in an internal combustion engine
Chemical to mechanical
what role do fluids play in a hydraulic system
they transfer force through pressurised liquid
why is stainless steel sometimes preferred over other metals for plumbing in areas prone to corrosion
it is highly resistant to rust and corrosion
which metal is often used for fittings in plumbing systems because of its strength and ability to resist high temperatures
brass
which property measures a materials resistance to being deformed
hardness
the purpose of gears in a mechanical engineering system is to
increase or decrease speed or torque
