Title: Final
Course: Intro to Control Devices (IC 108-IC 108) > Section: Assessments

Q: ___________ are classified as fluids.
- Liquids
- Gasses
- Vapors
A: Liquids

Q: ___________ scan is a scanning technique which focuses the light beam to a fixed focal point in front of the photoreceiver.
- Polarized
- Specular
- Diffuse
- Convergent beam
A: Polarized

Q: _____________ scan is a scanning technique which should generally be the first choice for scanning targets that block most of the light beam.
- Direct
- Polarized
- Specular
- Convergent beam
A: Direct

Q: _______________ scan is a scanning technique normally used in high-vibration applications.
- Direct
- Retroreflective
- Specular
- Convergent beam
A: Direct

Q: A batch process uses a continuous level measurement device.
- True
- False
A: False

Q: A capacitive proximity detector senses_________.
- metallic materials
- nonmetallic material
- both a and b
A: metallic materials

Q: A conductive probe makes _____________ measurements.
- point
- continuous
- both a and b
A: point

Q: A dirty optical lens reduces the ability of all methods of light detection to differentiate between different levels of light.
- True
- False
A: True

Q: A distance of __________ is required within or next to a material that may be detected when using non-flush-mounted inductive and capacitive proximity sensors.
- 1
- 2
- 3
- 4
A: 1

Q: A gas can be a vapor, stream, or air from the atmosphere.
- True
- False
A: True

Q: A psia reading of zero indicates ___________.
- the atmospheric pressure at sea level
- a vacuum
A: the atmospheric pressure at sea level

Q: A pyrometer that measures radiant energy at two different wavelengths is the_______________ pyrometer.
- broadband
- optical
- ratio
- dual color
A: broadband

Q: A rotameter can be used to provide a feedback signal for closed-loop control.
- True
- False
A: True

Q: A temperature rise ___________ the density of a gas.
- increases
- reduces
- has no effect on
A: increases

Q: A(n) _____________ photoelectric control is a photoelectric control that energizes the output switch when the target is present (breaks the path of the beam).
- light-operated
- dark-operated
- ON
- OFF
A: light-operated

Q: All pressure measurements are made against a reference pressure. The reference pressure for psig is ____________.
- a vacuum
- atmospheric pressure
- 0 inches of water column
- 100 inches of water column
A: a vacuum

Q: Direct measurement devices are also referred to as being _____________.
- invasive
- non-invasive
A: invasive

Q: Displacers used in level measurement systems are ___________ of the measured fluid.
- lighter than an equal volume
- the same weight as an equal volume
- heavier than or equal to the volume
- half the weight
A: lighter than an equal volume

Q: If a confined gas is compressed, its temperature will _____________.
- increase
- decrease
- remain the same
A: increase

Q: If the temperature to which the circuits in the following figure are exposed increases, the voltage measured by the meter will _____________.
- increase
- decrease
A: increase

Q: If the viscosity of a gas increases, its ability to flow ___________.
- increases
- decreases
A: increases

Q: In a purge level measurement system, the amount of pressure required to force air through the tube is ______________ proportional to the amount of liquid in the tank.
- directly
- inversely
A: directly

Q: In a time of flight ultrasonic flow meter, the difference between the transmitted and received frequencies become _________ as the velocity of the fluid increases.
- smaller
- greater
A: smaller

Q: In an electromagnetic flow detector, a voltage is induced into the flowing substance.
- True
- False
A: True

Q: Name the type of scanning method in the figure below.
- Direct scan
- Retroreflective scan
- Polarized scan
- Specular scan
- Diffuse scan
A: Direct scan

Q: Name the type of scanning method in the figure below.
- Direct scan
- Retroreflective scan
- Polarized scan
- Specular scan
- Diffuse scan
A: Direct scan

Q: Proximity detectors are capable of producing a linear output signal that is inversely proportional to the distance of the target to the sensor.
- True
- False
A: True

Q: Retrorefective sensors can detect translucent objects if the emitter/detector module is placed at a skewed angle to its flat surface.
- True
- False
A: False

Q: Standard electronic current transmission signals range from _________________
- 0mA to 20mA
- 4mA to 20mA
- 0mA to 10mA
- 0mA to 30mA
A: 0mA to 20mA

Q: The  ___________ design is the best type of differential pressure flow meter to measure slurries.
- orifice plate
- flow nozzle
- venturi tube
A: orifice plate

Q: The differential pressure meter can be used to measure the flow rate of liquid, but not a gas.
- True
- False
A: False

Q: The differential travel property of a proximity sensor is that the target must be ____________ to turn on than to turn off.
- closer
- farther away
A: closer

Q: The Hall-effect sensor detects ____________.
- metallic objects
- nonmetallic objects
- magnetic fields
A: metallic objects

Q: The hydrostatic pressure created by a liquid in a closed container _________ when its temperature increases.
- increases
- decreases
- stays the same
A: increases

Q: The level of a material can be determined by measuring the weight of the contents in a pressurized container.
- True
- False
A: False

Q: The method of measuring one variable to determine the value of another is referred to as _______________.
- the conversion method
- an inferred measurement
- a translation measurement
A: the conversion method

Q: The only difference in how a three-wire sourcing and sinking sensor is connected is the polarity of the external power supply to which its load is wired.
- True
- False
A: True

Q: The operating point at which the level of light intensity triggers the output is determined by the ____________ adjustment.
- sensitivity
- differential
- voltage
- current
A: sensitivity

Q: The power source of static pressure is _____________.
- a pump
- a compressor
- a motor
- gravity
A: a pump

Q: The process by which thermal energy is transferred by a solid is called _____________.
- convection
- conductance
- radiation
A: convection

Q: The recommended diameter of the inductive proximity sensor head is twice the width of the target.
- True
- False
A: False

Q: The term interface refers to the location where two mediums, such as ______________, make contact with on another.
- liquids and solids
- liquids and gas
- liquids and liquids
- solids and gases
A: liquids and solids

Q: The thermocouple circuits, cold junction compensation is used to eliminate errors due to the effect of ____________.
- hysteresis
- dead band
- ambient temperatures
- open circuits
A: hysteresis

Q: The unit of flow measurement is primarily based on ___________.
- weight
- flow rate
- velocity
A: weight

Q: There is __________ pressure on the incoming side of an orifice than on the outgoing side.
- less
- more
A: less

Q: When a differential pressure technique is used to measure level in a pressurized vessel, the low pressure sensor of the DP device is generally connected to ___________.
- the bottom of the vessel
- the vapor space above the stored fluid
- atmoshere
- a vacuum pump
A: the bottom of the vessel

Q: When the pressure transducer is connected to the bottom of a vessel for the purpose of measuring level, what is the actual variable being measured?
- level,directly
- differential pressure
- hydrostatic head pressure
- volume
A: level,directly

Q: When using a pyrometer, the target being measured _____________ completely fill the view of the instrument.
- should
- does not have to
A: should

Q: Which factors can cause turbulent flow?
- The diameter of a pipe is increased.
- The flow rate is reduced.
- The temperature to which the fluid is exposed decreases.
A: The diameter of a pipe is increased.

Q: Which of the following factors about the target determines the ability of a capacitor to detect its presence?
- dimension
- shape
- distance from the head
- position
A: dimension