Quiz 1 Flashcards
Flow leaving an orifice reaches a point where its area is minimum and the velocity is maximum. This is referred to as:
a) The differential velocity
b) The vena contracts
c) The orifice constant
d) Straightening
b)The vena contracts
Potential energy is the energy the fluid has by virtue of its:
a) Motion
b) Temperature
c) Position
d) pressure
c) Position
The standard that governs the specification for the design and installation of differential pressure flowmeters states that the upstream edge of the orifice plate shall be as flat as can be obtained by commercially and shall be:
a) Installed with the bevel facing upstream
b) Perpendicular to the axis of the pipe
c) Bevelled of an angle of greater than 45 degrees
d) Parallel to the axis of the pipe
b) Perpendicular to the axis of the pipe
the main disadvantage of an orifice plate installation is the:
a) High Pressure loss
b) High price
c) Difficulty of installation and replacement
d) Inflexibity for changes in flow range
a) High Pressure loss
The eccentric orifice is designed to pass fluids with suspended or entrained material because impurities:
a) provide the kinetic energy necessary to flow
b) build up behind the plate and cause erratic or false readings
c) increase the temperature of the fluid
d) reduce the pressure of the fluid
b) build up behind the plate and cause erratic or false readings
Which statemen better describe hydrostactic pressure:
a) This is the pressure that is applied at the surface of the liquid
b) The pressure at the bottom of the liquid will be greater than the surface pressure
c) The pressure at the top of the liquid will be greater than the surface pressure
d) Because the liquids have low densities the effect on hydrostatic pressure will be negligible
b) The pressure at the bottom of the liquid will be greater than the surface pressure
The pressure created by hydrostatic pressure will cause an increase in the boiling point temperature of the water at the bottom of a very large boiler:
a) True
b) False
a) True
Which terminology best describes the term deposition
a) A change of state from a vapour to a solid state
b) A change from a liquid to vapour state
c) A change from a solid to a liquid state
d) A change from a solid to a vapor state
a) A change of tate from a vapour to a solid state
The change of dry ice to a vapour best describe deposition?
a) True
b) False
b) False
Differential pressure flowmeters:
a) Can be used to measure level
b) Measure the difference in pressure across a restriction placed in a pipe
c) Do not create a drop in pressure
d) Are classified as variable area meters
b) Measure the difference in pressure across a restriction placed in a pipe
Which of the following instruments used in measuring flow is not considered a meter:
a) Nutating disc meter
b) Turbine meter
c) Bellows type meter
d) Rotating van type meter
b) Turbine meter
Sensible heat:
a) Causes a rise in temperature
b) Can not be read on a termometer
c) Can not be removed from a solid
d) Is a sensible latent heat of fusion
a) Causes a rise in temperature
Increasing the pressure has what effect on the boiling point of water:
a) no change
b) temperature will be lowered
c) temperature will be raised
d) temperature willl increase 2 F for every psi
c) temperature will be raised
Heat which brings about a change of state:
a) can be sensed by a thermometer
b) it is called sensible heat
c) causes a change of temperature
d) it is called latent heat
e) it is called saturated state
d) it is called latent heat
Sensible heat:
a) It is the latent heat plus heat of evaporation
b) causes a rise in temperature
c) cannot be read on a termometer
d) is the latent heat of fusion
e) does not exist in vapors
b) causes a rise in temperature
