Description : What part of a floppy disk drive transport uses a dc stepper motor to position the magnetic heads over the recording surface of a floppy disk?
Last Answer : Actuator arm assembly.
Description : Magnetic tape recorders can have up to three different heads installed. What are the three functions performed by a recorder's heads?
Last Answer : Record, reproduce, and erase.
Description : In the actuator arm assembly of a hard disk drive transport, what device can position the magnetic heads to the correct track of a hard disk more accurately than a dc stepper motor?
Last Answer : Voice coil servo.
Description : What three things are required to perform magnetic recording
Last Answer : a. An input signal. b. A recording medium. c. A magnetic head.
Description : What three formats are used for digital magnetic tape recording?
Last Answer : 1) Serial, (2) parallel, and (3) serial-parallel.
Description : In digital magnetic tape recording, the series of recorded digital pulses can represent what three types of data?
Last Answer : a. Data used by digital computers. b. Pulsed squarewave signals. c. Digitized analog waveforms.
Description : . How do tape transports with differential velocity capstans maintain a constant tape tension in the area around the magnetic heads?
Last Answer : The supply capstan is slightly larger than the take-up capstan. This causes the take-up capstan to pull the tape slightly faster than the supply capstan feeds the tape.
Description : How often should you demagnetize a recorder's magnetic heads?
Last Answer : Every 8 to 25 hours depending on the manufacturer's recommendations.
Description : What type of equipment should you use to demagnetize your recorder's magnetic heads?
Last Answer : A hand-held degausser like the manual degaussers used for degaussing magnetic tape.
Description : What are four sources that can cause magnetic heads to become magnetized?
Last Answer : a. During ac power losses. b. During testing. c. Because of stray magnetic fields. d. From normal use.
Description : How should you clean your recorder's magnetic heads?
Last Answer : With a cotton-tipped applicator soaked in either isopropyl alcohol or a head cleaner recommended by the recorder's manufacturer.
Description : After using a tape that was stored in an area where temperatures exceeded 130º F you notice pieces of oxide sticking to the recorder's tape-transport mechanism, to its magnetic heads, and onto the tape. What is the probable cause of these symptoms?
Last Answer : Oxide shedding. At temperatures above 130º F, oxide coating becomes soft and sheds.
Description : What two preventive maintenance actions must you do regularly to increase magnetic head life and to ensure good tape recording and playback?
Last Answer : a. Keep the heads clean. b. Keep the heads demagnetized.
Description : What are four types of tape errors that can degrade a magnetic recording system’s performance?
Last Answer : Signal dropout, noise, skew, and level. Dropout is the most common.
Description : What is the meaning of the term recording medium as it pertains to magnetic recording?
Last Answer : A recording medium is any material that has the ability to become magnetized, in varying amounts, in small sections along its entire length.
Description : Most record and reproduce heads are in one of what three bandwidth categories?
Last Answer : a. Narrowband—100 Hz to 100 kHz. b. Intermediate band—100 Hz to 500 kHz. c. Wideband—400 Hz to 2 mHz.
Description : Why are record heads always placed before reproduce heads on recorders?
Last Answer : Allow you to monitor the signals you're recording.
Description : What two specifications determine the maximum frequency that a recorder's record and reproduce heads will be able to transfer?
Last Answer : a. Size of the headgap. b. Speed of the magnetic tape.
Description : The head arm assembly of a floppy disk drive transport has how many read heads and how many write heads?
Last Answer : Two read heads and two write heads.
Description : Which digital data encoding method helps overcome a tape recorder’s low-frequency response problems by recording two logic levels for each incoming data bit?
Last Answer : Bi-phase level encoding.
Description : What format of digital tape recording is normally used to record instrumentation or telemetry data?
Last Answer : Serial digital magnetic tape recording.
Description : What format of digital tape recording takes a serial input stream of data pulses, breaks them up, and records them on more than one data track?
Last Answer : Serial-parallel digital magnetic tape recording.
Description : What format of digital tape recording is normally used to store computer data?
Last Answer : Parallel digital magnetic tape recording.
Description : What is the number of read-write heads in the drive for a 9- trac magnetic tape? A) 9 B) 16 C) 18 D) 27
Last Answer : Answer : A
Description : What is the number of read-write heads in the drive for a 9-trac magnetic tape? a. 9 b. 16 c. 18 d. 27
Last Answer : 27
Last Answer : a. 9
Description : The control electronics component of a floppy or hard disk drive performs what three main functions?
Last Answer : a. Spins the disk at the correct speed. b. Moves the heads across the recording surface. c. Tells the write/read heads when to write data and when to read it.
Description : Hard disk drive transports contain the electromechanical parts that perform what three functions?
Last Answer : a. Rotates the hard disk platters. b. Writes data to and reads data from the disk platters
Description : What three functions does the transistor in a regenerative detector serve?
Last Answer : Oscillator, mixer, and detector.
Description : What are three functions of the hairsprings in a d’Arsonval meter movement?
Last Answer : To return the pointer to its rest position when there is no current flow; to oppose the coil movement when there is current flow; to provide electrical connections for the coil.
Description : The data recording format in most of the modern magnetic tape is A) 7-bit ASCII B) 7-bit EBCDIC C) 8-bit ASCII D) 8-bit EBCDIC
Last Answer : Answer : D
Description : The data recording format in most of the modern magnetic tape is a. 7-bit ASCII b. 7-bit EBCDIC c. 8-bit ASCII d. 8-bit EBCDIC
Last Answer : 8-bit EBCDIC
Last Answer : d. 8-bit EBCDIC
Last Answer : Magnetic recording tape is most commonly made from ferric oxide.
Description : ______ is most commonly used for making magnetic recording tape.
Last Answer : Ferric oxide is most commonly used for making magnetic recording tape.
Description : Did officer Darren Wilson's vehicle have a video camera or any other recording device?
Last Answer : There doesn’t seem to be any police car cam or personal cam. Such video to defend the officer would have been available a week ago if it existed.
Description : Would it be possible to make a sub-vocal recording device?
Last Answer : Yes. To reduce development time I'd start with as much COTS (commercial off the shelf) parts as possible. The only new bit would be a sensitive preamp to get the levels up to where commercial ... have it learn the new sound patterns by reading the learning text in the voice you want to record.
Description : What is an endoscope? (1) It is an optical instrument used to see inside the alimentary canal (2) It is a device which is fitted on the chest of the patient to regularize the ... used for examining ear disorders (4) It is an instrument for recording electrical signals produced by human muscles
Last Answer : (1) It is an optical instrument used to see inside the alimentary canal Explanation: Endoscopymeans looking inside and typically refers to looking inside the body for medical reasons using ... : breathing disorders; chronic diarrhea; internal bleeding; irritable bowel syndrome; stomach ulcers, etc.
Description : What is an endoscope ? (1) It is an optical instrument used to see inside the alimentary canal (2) It is a device which is fitted on the chest of the patient to regularise the ... used for examining ear disorders (4) It is an instrument for recording electrical signals produced by human muscles
Last Answer : It is an optical instrument used to see inside the alimentary canal
Description : What the three basic components make up the typical magnetic amplifier?
Last Answer : Two saturable reactors and a transformer.
Description : The way a magnetic head will be used determines how it is constructed. Name three factors that determine the final construction of a magnetic head.
Last Answer : a. Type of head (record, reproduce, or erase). b. Frequencies it will record or reproduce. c. Whether it will be used on a single or multitrack recorder.
Description : When magnetic tapes are ruined, what three factors are normally the cause?
Last Answer : Poor handling, improper storage, or shipping damage.
Description : If magnetic tape is stored in areas with temperature and humidity extremes, what are three types of tape damage that may occur?
Last Answer : Oxide shedding, layer-to-layer sticking, and tape deformation.
Description : Magnetic tape is made of what three basic materials?
Last Answer : a. Base material. b. Coating of magnetic oxide particles. c. Glue that bonds the particles to the base.
Description : What are the three most popular methods for encoding digital data onto magnetic disks?
Last Answer : a. Frequency modulation (FM). b. Modified frequency modulation (MFM). c. Run length limited (RLL).
Description : Digital magnetic tape recorders used to store and retrieve digital data fall into what three categories?
Last Answer : a. Computer-compatible digital tape recorders. b. Telemetry digital tape recorders. c. Instrumentation digital tape recorders
Description : What is the name given to the semiconductor device that has three or more elements?
Last Answer : Transistor
Description : Waveforms are described in terms of what two functions?
Last Answer : Amplitude and time.