Mechanical Measurements & Instrumentation MCQ
What does FM stand for?
Answer
Correct Answer:
Factory Mutual Research Corporation
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What is a floppy disk?
Answer
Correct Answer:
A small, flexible disk carrying a magnetic medium in which digital data is stored for later retrieval and use.
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What is the definition of "Flag?"
Answer
Correct Answer:
A character that signals the termination of a transmission.
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What does "PROM" stand for in the context of firmware?
Answer
Correct Answer:
Programmable Read-Only Memory
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What does a file refer to?
Answer
Correct Answer:
A set of related records or data treated as a unit
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What is the Field of View?
Answer
Correct Answer:
A volume in space defined by an angular cone extending from the focal plane of an instrument.
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What is a ferrule?
Answer
Correct Answer:
A compressible tubular fitting that is compressed onto a probe inside a compression fitting to form a gas-tight seal.
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Which temperature is equal to 100° on the Fahrenheit scale?
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How many degrees are in between the ice point and boiling point on the Fahrenheit scale?
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Erasable Programmable Read-Only Memory can be erased by _____ .
Answer
Correct Answer:
Ultraviolet light or electricity
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What is the full form of Eprom?
Answer
Correct Answer:
Erasable Programmable Read-Only Memory
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What does the acronym "EC" stand for in "Environmental Conditions?"
Answer
Correct Answer:
All conditions to which a transducer may be exposed during shipping, storage, handling, and operation.
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What is enthalpy?
Answer
Correct Answer:
The sum of the internal energy of a body and the product of its volume multiplied by the pressure.
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What is the End Point (Potentiometric)?
Answer
Correct Answer:
The apparent equivalence point of a titration at which a relatively large potential change is observed.
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What is the apparent equivalence point of a titration?
Answer
Correct Answer:
The point at which a relatively large potential change is observed.
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A process is said to be ________ when it absorbs heat.
Answer
Correct Answer:
Endothermic
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What is emissivity?
Answer
Correct Answer:
The ratio of energy emitted by an object to the energy emitted by a blackbody at the same temperature.
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What is the unit of EMF?
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What does EMF stand for?
Answer
Correct Answer:
Electromotive force
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What is the abbreviation for Electronic Industries Association?
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What is the full form of EIA?
Answer
Correct Answer:
Electronic Industries Association
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Which of the following is NOT an element of electomotive force?
Answer
Correct Answer:
Cell voltage
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What is electrical interference?
Answer
Correct Answer:
Electrical noise induced upon the signal wires that obscures the wanted information signal.
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What does the term "echo" mean in the context of computer networks?
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Correct Answer:
To reflect received data to the sender.
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What is the word for when data is reflected back to the sender?
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What is Deviation?
Answer
Correct Answer:
The difference between the value of the controlled variable and the value at which it is being controlled.
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What is density?
Answer
Correct Answer:
Mass per unit of volume of a substance
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How many incremental values are there in the temperature scale?
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What is the definition of "Default"?
Answer
Correct Answer:
The value(s) or option(s) that are assumed during operation when not specified.
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What does the word "decimal" refer to?
Answer
Correct Answer:
A base ten number system using the characters 0 through 9 to represent values.
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What is the definition of "Debug?"
Answer
Correct Answer:
To find and correct mistakes in a program.
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What is the temperature band where heat is turned off upon rising temperature and turned on upon falling temperature expressed in degrees called?
Answer
Correct Answer:
Controllers
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What is the minimum change of input signal required to cause a deflection in the pen position?
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What is Deadband?
Answer
Correct Answer:
The minimum change of input signal required to cause a deflection in the pen position
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What does "DC" stand for in electrical current?
Answer
Correct Answer:
Direct current
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What is a data base management system?
Answer
Correct Answer:
A program that allows access to the information.
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What is the reduction of vibratory movement through dissipation of energy called?
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What is the definition of damping?
Answer
Correct Answer:
The reduction of vibratory movement through dissipation of energy.
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Which of the following is FALSE about continuous spectrum?
Answer
Correct Answer:
The spectrum is continuous in the frequency domain and is characterized by an infinite number of frequency components.
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What is a continuous spectrum?
Answer
Correct Answer:
A frequency spectrum that is characterized by non-periodic data.
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What is the function of a Connection Head?
Answer
Correct Answer:
To enclose the electrical connections made by the thermocouple
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What is the main purpose of a Connection Head?
Answer
Correct Answer:
To make electrical connections
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Conformity Error is caused by:
Answer
Correct Answer:
The difference between the actual reading and the temperature shown in published tables for a specific voltage input.
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What does the term "Confidence Level" refer to?
Answer
Correct Answer:
The range within which the true value of a measured quantity exists
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What is the conveying of electrical energy or heat through or by means of a conductor called?
Answer
Correct Answer:
Conduction
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What is the definition of "Conduction"?
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Correct Answer:
The conveying of electrical energy or heat through or by means of a conductor.
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What is conductance?
Answer
Correct Answer:
The measure of the ability of a solution to carry an electrical current.
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What is a compiler?
Answer
Correct Answer:
A program that translates a high-level language, such as Basic, into machine language.
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What does the term "compensation" mean?
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Correct Answer:
An addition of specific materials or devices to counteract a known error.
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What is the purpose of a compensating loop?
Answer
Correct Answer:
Lead wire resistance compensation for RTD elements
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Why are compensating alloys used?
Answer
Correct Answer:
To connect thermocouples to instrumentation
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What is a compensated connector?
Answer
Correct Answer:
A connector made of thermocouple alloys used to connect thermocouple probes and wires.
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What is Communication?
Answer
Correct Answer:
Transmission and reception of data among data processing equipment and related peripherals.
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What is the full form of dB in the context of the given content?
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What is the output form or type of control action used by a temperature controller to control temperature?
Answer
Correct Answer:
On/off, time proportioning, PID
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What is the Total temperature variation from a desired set point of system called?
Answer
Correct Answer:
Closeness of Control
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What is the meaning of closeness of control?
Answer
Correct Answer:
Total temperature variation from a desired set point of system
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What does a clock do?
Answer
Correct Answer:
Generates periodic signals for synchronization
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What is the term applied to the phenomenon which occurs when an output signal is limited in some way?
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What does "Clear" mean?
Answer
Correct Answer:
To restore a device to a prescribed initial state, usually the zero state.
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What does chatter refer to in a control process?
Answer
Correct Answer:
The rapid cycling on and off of a relay due to insufficient bandwidth in the controller.
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What is chatter in a control process?
Answer
Correct Answer:
The rapid cycling on and off of a relay
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What is a character?
Answer
Correct Answer:
A letter, digit or other symbol that is used as the representation of data.
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What are Ceramic materials mainly used for?
Answer
Correct Answer:
Polycrystalline ferroelectric materials
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What is the most common type of ceramic insulation?
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Where was the Celsius temperature scale defined?
Answer
Correct Answer:
At the ice point and boiling point of water
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What is the boiling point of water on the Celsius scale?
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What causes cavitation?
Answer
Correct Answer:
A decrease in pressure
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How many calories are needed to raise one gram of water 1°C?
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What is a calorie?
Answer
Correct Answer:
The quantity of thermal energy required to raise one gram of water 1°C at 15°C.
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What does calibration involve?
Answer
Correct Answer:
The process of adjusting an instrument so that its reading can be correlated to the actual value being measured.
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What is the Breakdown Voltage Rating?
Answer
Correct Answer:
The voltage which can be applied to insulation without arcing or conduction.
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Above what voltage value can a transducer be applied without arcing or conduction?
Answer
Correct Answer:
Breakdown Voltage Rating
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What is the boiling point of water?
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What is the BNC connector?
Answer
Correct Answer:
A quick disconnect electrical connector used to interconnect and/or terminate coaxial cables
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What does BNC stand for?
Answer
Correct Answer:
Bayonet Neill–Concelman
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What colours can a blackbody be?
Answer
Correct Answer:
Not necessarily black
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What is a Bit?
Answer
Correct Answer:
The smallest unit of computer information, it is either 0 or 1.
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What does the term "Bipolar" refer to in the electrical field?
Answer
Correct Answer:
The ability of a panel meter to display both positive and negative readings.
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What does the term "Binary" refer to?
Answer
Correct Answer:
The base 2 numbering system, in which the only allowable digits are 0 and 1
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What are the only two allowable digits in the binary numbering system?
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What is the base of Binary Coded Decimal?
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What is the minimum number of bits required to represent a decimal number in BCD form?
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What does BIAS Current refer to?
Answer
Correct Answer:
A very low-level DC current generated by a panel meter and superimposed on a signal
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What is the chemical formula for Beryllia?
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Beryllium Oxide is which of the following?
Answer
Correct Answer:
A high-temperature mineral insulation material
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How many lines are used to represent one decimal digit in BCD?
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BCD is which type of data output format?
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What does BCD stand for?
Answer
Correct Answer:
Buffered: Binary-coded decimal output with output drivers
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What is the unit of data transmission speed equal to the number of bits per second?
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What does Baud measure?
Answer
Correct Answer:
The number of bits per second
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What does the acronym "BASIC" stand for?
Answer
Correct Answer:
Beginner's All-purpose Symbolic Instruction Code
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What is Bandwidth?
Answer
Correct Answer:
A symmetrical region around the set point in which proportional control occurs.
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What is the total noise floor from all sources of interference in a measurement system called?
Answer
Correct Answer:
Background Noise
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What is the output of an amplifier?
Answer
Correct Answer:
Enlarged reproduction of the essential features of its input
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What is the unit used to define the rate of flow of electricity in a circuit?
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How many electrons flow in one ampere?
Answer
Correct Answer:
6.28 x 1018
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What is an ammeter used for?
Answer
Correct Answer:
To measure current
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What is the average or mean temperature of the surrounding air which comes in contact with the equipment and instruments under test?
Answer
Correct Answer:
Ambient Temperature
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What is the definition of ambient conditions?
Answer
Correct Answer:
The conditions around the transducer
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Transducer is a device that _______.
Answer
Correct Answer:
Converts energy from one form to another
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What is alumel?
Answer
Correct Answer:
An aluminum nickel alloy used in the negative leg of a Type K thermocouple
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What is the definition of alphanumeric?
Answer
Correct Answer:
A character set that contains both letters and digits.
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With which alloy is pure copper used as the negative leg to form extension wire for platinum—platinumrhodium thermocouples?
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What is the minimum sample rate needed to avoid aliasing?
Answer
Correct Answer:
Fs >= 2*highest frequency value
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What does the address label identify?
Answer
Correct Answer:
The memory location where a unit of information is stored.
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What is the definition of "address"?
Answer
Correct Answer:
The label or number identifying the memory location where a unit of information is stored.
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ADC stands for ____
Answer
Correct Answer:
Analog-to-Digital Converter
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What is an adaptor?
Answer
Correct Answer:
A mechanism or device for attaching non-mating parts.
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What is the accuracy of a measurement device usually expressed as?
Answer
Correct Answer:
± percent of full scale output or reading
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What is the full form of AC?
Answer
Correct Answer:
Alternating current
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What is the temperature of Absolute Zero?
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