Description : Which statement is valid about magnetic tape? a. It is a plastic ribbon b. It is coated on both sides with iron oxide c. It can be erased and reused d. All of above
Last Answer : It is a plastic ribbon
Last Answer : a. It is a plastic ribbon
Description : The substance coated on plastic tape recorder tapes is (a) zinc oxide (b) magnesium oxide (c) iron sulphate (d) iron oxide
Last Answer : Ans:(d)
Description : Hard disk is coated in both sides with A) Magnetic metallic oxide B) Optical metallic oxide C) Carbon layer D) All of the above
Last Answer : Answer : A
Description : Hard disk is coated in both side with A) Magnetic metallic oxide B) Optical metallic oxide C) Carbon layer D) All of the above
Description : Direct Thermal printer does not use _________ A. heat B. coated paper C. ribbon D. None of the Above
Last Answer : C. ribbon
Description : Which substance coated on plastic tape?
Last Answer : Iron oxide
Description : Hard disk is coated in both side above a. Magnetic metallic oxide b. Optical metallic oxide c. Carbon layer d. All of the above
Last Answer : Magnetic metallic oxide
Last Answer : a. Magnetic metallic oxide
Description : Pick out the correct statement. (A) Stainless steel is nothing but chromium coated steel (B) Hardening of a soft metal can be done by alloying it with another metal or non-metal (C) ... its temporary distortion under the action of applied stress (D) Rusting of iron is not electrochemical in nature
Last Answer : (B) Hardening of a soft metal can be done by alloying it with another metal or non-metal
Description : The displacement reaction between iron (III) oxide and a metal X is used for welding the rail tracks. Here X is: (a) Copper granules (b) Magnesium ribbon (c) Sodium pellets (d) Aluminum dust
Last Answer : (d) Aluminum dust
Description : Can you recover images from erased VHS tape?
Last Answer : No. Unlike digital media, once a VHS tape is erased, it's gonefor good.
Description : Pick out the correct statement. (A) Noise from ball mills can be dealt with by fibre glass lined enclosures (B) Noise from vibrating chutes can be reduced by lining the metallic chute with rubber (C) Noise ... cloth conveyor belts and rubber/plastic covered metallic rollers (D) All (A), (B) & (C)
Last Answer : (D) All (A), (B) & (C)
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 : You are provided with magnesium ribbon and sulpher powder. Explain with the help of an activity that metal oxides are basic and non-metal oxide are acidic in nature. -Chemistry
Last Answer : Aim: To test the nature of oxides formed by metals and non-metals. Materials Required: Sulphur powder, Mg ribbon, water, blue litmus paper, red litmus paper. Procedure: 1.Take magnesium ribbon ... the metallic oxides are basic in nature whereas most of the non-metallic oxides are acidic in nature.
Description : Which compound is formed when a Magnesium ribbon is burnt in air? (1) Magnesium Nitrate (2) Magnesium Carbonate (3) Magnesium Oxide (4) Magnesium Nitride
Last Answer : (3) Magnesium Oxide Explanation: When Magnesium burns air it reacts with oxygen present in air to form magnesium oxide.
Description : Magnesium ribbon on burning in air produces a) magnesium oxide ,water and light c) magnesium oxide and heat b) magnesium oxide , heat and light d) magnesium oxide, water and heat
Last Answer : b) magnesium oxide , heat and light
Description : Which of the following statements best describes the material known as varnished cambric? A. Felted asbestos sealed with varnish. B. Cotton cloth coated with insulating varnish. C. Rubber ... Paper impregnated with mineral oil, specially wrapped with nonmetallic tape, and coated with varnish.
Last Answer : Answer: B
Description : A plastic card similar to a credit card but having some memory and a microprocessor embedded within it is a. Punched paper tape b. Chip card c. Card punch d. Magnetic tape
Last Answer : Punched paper tape
Description : Why is plastic magnetic tape used more than metal tape?
Last Answer : Plastic tape is used more than metal because it’s more flexible, resists mildew and fungus, and is very stable at high temperatures and humidity.
Last Answer : a. Punched paper tape
Description : In mirrors the back surface is coated with a thin layer of (1) Mercury (2) Silver (3) Red oxide (4) Silver nitrate
Last Answer : (2) Silver Explanation: In a spherical mirror, one of the two curved surfaces is coated with a thin layer of silver followed by a coating of red lead oxide paint. Thus, one side of the spherical minor is opaque and the other side is a highly polished reflecting surface.
Description : In mirrors the back surface is coated with a thin layer of : (1) Mercury (2) Silver (3) Red oxide (4) Silver nitrate
Last Answer : Silver
Description : Pick up the correct statement from the following: (A) Blisters in the finished wrought iron, are caused due to the reaction between oxide of iron and carbon (B) The edges of a finished wrought iron ... shortage (C) Pig iron (charcoal) is manufactured from magnetic ore (Fe3O4) (D) All the above
Last Answer : Answer: Option D
Description : A disk’s content that is recorded at the time of manufacture and that cannot be changed or erased by the user is ________ A. Write only B. Read Only C. Both (A) and (B) D. None of the Above
Last Answer : B. Read Only
Description : The proper way to apply plastic electrical tape to an electric cable splice is to _____________. A. apply tape to the braided cover, but avoid touching it B. wind the tape so that each turn overlaps ... tape in one non-overlapping layer only D. heat the tape with a soldering iron for good bonding
Description : Why are cookware handles coated with rubber or hard plastic?
Last Answer : To prevent the handles from getting too hot, hence allowing aperson to hold it.
Description : Which of the following memory medium is not used as main memory system? A) Magnetic core B) Semiconductor C) Magnetic tape D) Both a and b
Last Answer : Answer : C
Description : Which of the following memory medium is not used as main memory system? A) Magnetic core B) Semiconductor C) Magnetic tape D) Both semiconductor and magnetic tape
Description : Which of the following type of printer uses a thermal transfer ribbon that contains wax-based ink? A. Direct Thermal B. Thermal Wax transfer C. Both (A) and (B) D. None of the Above
Last Answer : B. Thermal Wax transfer
Description : _________ printers print the characters without using ribbon and it can print a complete page at a time. A. Impact B. Non Impact C. Both (A) and (B) D. None of the Above
Last Answer : B. Non Impact
Description : __________ printers print the characters by striking them on the ribbon which is then pressed on the paper. A. Impact B. Non Impact C. Both (A) and (B) D. None of the Above
Last Answer : A. Impact
Description : A disk's content that is recorded at the time of manufacture and that cannot be changed or erased by the user is: a) Write Only b) Memory Only c) Read Only d) None of These
Last Answer : c) Read Only
Description : A disk's content that is recorded at the time of manufacture and that cannot be changed or erased by the user is: a) memory only b) write only c) once only d) run only e) read only
Last Answer : e) read only
Description : A disk's content that is recorded at the time of manufacture and that cannot be changed or erased by the user is a) Memory only b) Write only c) Read only d) Run only e) None of these
Last Answer : c) Read only
Description : A CD-RW disk- 1) Has a faster access than an internal disk 2) Is a form of optical disk, so it can only be written once 3) Holds less data than a floppy disk 4) Can be erased and rewritten
Last Answer : 4) Can be erased and rewritten
Description : For more complete vessel protection when using an impressed current cathodic system _____________. A. all ship's service alternators have additional temperature sensing devices and a thermal recorder ... with the hull and the propeller shaft is grounded through a slip ring/brush arrangement
Last Answer : Answer: D
Description : The magnetic oxide of iron is
Last Answer : The magnetic oxide of iron is A. Haemitite B. Magnetite C. Siderite D. Limonite
Description : Which of the following is not a primary storage device? A) Magnetic tape B) Magnetic disk C) Optical disk D) All of the above
Last Answer : Answer : D
Description : Which of the following is not a primary storage device? A) Magnetic tape B) Magnetic disk C) Optical disk D) All of above
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
Description : The number of records contained within a block of data on magnetic tape is defined by the A) Block definition B) Record contain clause C) Blocking factor D) Record per block
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
Description : Magnetic tape can serve as A) Secondary storage media B) Output media C) Input media D) All of the above
Description : The magnetic storage chip used to provide non-volatile direct access storage of data and that have no moving parts are known as A) Magnetic core memory B) Magnetic tape memory C) Magnetic disk memory D) Magnetic bubble memory
Description : An output device that uses words or messages recorded on a magnetic medium to produce audio response is A) Magnetic tape B) Voice response unit C) Voice recognition unit D) Voice band
Last Answer : Answer : B
Description : Which of the following is not true for a magnetic disk? A) It is expensive relative to magnetic tape B) It provides only sequential access to stored data C) Users can easily update records by writing over the old data D) All of above
Description : Perforated paper used as input of output media is known as A) paper tapes B) magnetic tape C) punched papers tape D) card punch
Description : The magnetic storage chips used to provide non-volatile direct access storage of data and that have no moving parts are known as________ A. Magnetic core memory B. Magnetic tape memory C. Magnetic disk memory D. Magnetic bubble memory
Last Answer : D. Magnetic bubble memory
Description : Codes consisting of lines of varying widths or lengths that are computer - readable are known as _______: a) an ASCII code b) a magnetic tape c) an OCR scanner d) a bar code e) None of The Above
Last Answer : d) a bar code