Description : Type of glass used in optical work is the __________ glass. (A) Soda-lime (B) Fibre (C) Lead (D) Borosilicate
Last Answer : (C) Lead
Description : __________ glass is used in the mercury in glass thermometer meant for measuring a temperature of 500°C. (A) Borosilicate (B) High silica (C) Supermax (D) Lead
Last Answer : (C) Supermax
Description : Which of the following is resistant to the action of both heat & chemicals? (A) Borosilicate glass (B) Silica glass (C) Soda lime glass (D) None of these
Last Answer : (A) Borosilicate glass
Description : Choose the optical fibre material from the given materials. a) Glass b) Plastic c) Silica d) Quartz
Last Answer : c) Silica
Description : Laboratory glass wares which reacts with hydrofluoric acid, are made of the __________ glass. (A) Lead (B) Borosilicate (C) Soda lime (D) Alkali silicate
Last Answer : (B) Borosilicate
Description : Pick out the wrong statement. (A) Hard glass which is used for making laboratory glass wares is a mixture of sodium borosilicate and aluminium borosilicate (B) Glass is decolorized during its manufacture by ... Na2O . CaO . 6SiO2 (D) Red color is imparted to glass by addition of arsenic oxide
Last Answer : (D) Red color is imparted to glass by addition of arsenic oxide
Description : At what temperature is glass fused to steel in the making of glass-lined equipment? The borosilicate glass is typically fused to carbon steel at a temperature of about 800 0C. 87. What are some typical applications for glass-lined reactors?
Last Answer : Glass-lined equipment gives superior protection to all mineral acids at all concentration and temperatures. One exception is hydrofluoric acid. They are also used is high-purity processes where cleanliness ... to the walls of the vessels while glass-lined vessels have good anti-stick properties.
Description : __________ glass has the lowest co-efficient of thermal expansion and hence is more heat resistant. (A) Pyrex (B) Soda lime (C) Lead (D) High silica
Last Answer : (A) Pyrex
Description : Sodium calcium silicate is called _______. (1) Hard glass (2) Borosilicate glass (3) Soft glass (4) Jena glass
Last Answer : (3) Soft glass Explanation: Ordinary glass which is also known as soda glass or soft glass is a mixture of sodium silicate, Calcium silicate, and Silica.
Description : Major component of flint glass is (A) Lead oxide (B) Silica (C) Alumina (D) Soda
Last Answer : (A) Lead oxide
Description : The chemical used in breather is A. Asbestos fibre B. Silica sand C. Sodium chloride D. Silica gel
Last Answer : Silica gel
Description : Fibre optics work on the principle of – (1) Scattering of light (2) Total internal absorption (3) Total internal reflection (4) Optical rotation
Last Answer : (3) Total internal reflection Explanation: An optical fiber (or optical fibre) is a flexible, transparent fiber made of glass (silica) or plastic, slightly thicker than a human hair. It ... science and engineering concerned with the design and application of optical fibers is known as fiber optics.
Description : Fibre optics work on the principle of (1) scattering of light (2) total internal absorption (3) total internal reflection (4) optical rotation
Last Answer : total internal reflection
Description : Rotary kilns in cement industry are lined with _________bricks. (A) Fireclay (B) Silica (C) Lead (D) High alumina & high magnesia
Last Answer : (D) High alumina & high magnesia
Description : SONET stands for ∙ a. System Optical Network ∙ b. Synchronous Optical Network ∙ c. Silica Optic Network ∙ d. System Optical Fiber Net
Last Answer : ∙ b. Synchronous Optical Network
Description : The major constituents of glass are (A) Lime, clay and soda ash (B) Sand, lime and soda ash (C) Silica, alumina and clay (D) Silica, alumina and soda ash
Last Answer : (B) Sand, lime and soda ash
Description : Which of the following is not a raw material used for the manufacture of ordinary glass? (A) Iron oxide (B) Soda ash (C) Limestone (D) Silica
Last Answer : (A) Iron oxide
Description : Do bends to drastic degrees in optical fibre reduce signal compared to when it's straight?
Last Answer : It’s digital, so there is no such thing as reduced signal. You have signal, or you don’t.
Description : What are some of the properties of optical fibre?
Last Answer : It's not brittle,but it's not tough or strong either.It's thin and it's subjected to breakage which is known as fibre cut in technical terms.They are used in communication process to ... engineering with respect to design and afety parameters.Moreover, it gives a very ugly look to the surroundings.
Description : Explain the three main parts of optical fibre cable. -Technology
Last Answer : The three main parts of optical fibre cable are as follows:1. Core It is the section through which the data travel in the form of light.2.Cladding The cladding is the covering part of core. ... Coating It is the outer cover of cladding for the protection of optical fibre from damage and moisture.
Description : Optical fibre works on the principle of
Description : Endoscope is an instrument used to detect the ulcers in the stomach has a long narrow tube (with a small glowing bulb at one end) which is inserted in to the stomach through the mouth contains. ... ) a narrow tube containing water (3) optical fibre (4) a narrow tube containing some chemical solution
Last Answer : (3) optical fibre Explanation: An endoscope can consist of a rigid or flexible tube and a light delivery system to illuminate the organ or object under inspection. The light source is normally outside the ... in the case of rigid endoscopes or a bundle of fiber optics in the case of a fiberscope.
Description : In an optical fibre the signal is transmitted – (1) in a straight line path (2) In a curved path (3) due to total internal reflection (4) Due to refraction
Last Answer : (3) due to total internal reflection Explanation: Total internal reflection is the basic concept be-hind the optical fiber. Optical fiber employs the transmission of light down fibers of plastic ... refractive index to allow more light to be guided along the fiber through total internal refraction.
Description : Optical fibre works on the principle of (1) refraction (2) scattering (3) interference (4) total internal reflection
Last Answer : (4) total internal reflection Explanation: Since Torque = force x distance, to open a door easily, the handle should be fixed at the greatest distance from the hinges. If we pull with same force on a handle ... from the hinges, we will provide twice the torque, so it will be twice as easy to open.
Description : Optical fibre works on the - (1) principle of refraction (2) total internal reflection (3) scattering (4) interference
Last Answer : b) total internal reflection Explanation: Optical fiber is a cylindrical dielectric waveguide (non-conducting waveguide) that transmits light along its axis, by the process of total internal reflection.
Description : What is optical fibre?
Last Answer : Optical fibre is a flexible, transparent fibre made up of very pure glass.
Description : Which technology is used in a CDROM Drive ? 1) Mechanical 2) Electromechanical 3) Optical 4) Fibre optical
Last Answer : 3) Optical
Description : Which India born physicist invented the 'Optical Fibre'?
Last Answer : Narinder Singh Kapany
Description : Who invented optical fibre? (1) Samuel Cohen (2) Narinder Kapany (3) Percy L.Spencer (4) T.H. Maimah
Last Answer : Narinder Kapany
Description : Identify the odd term amongst the following group : (1) Optical fibre (2) Twisted pair wire (3) Microwaves (4) Coaxial cable
Last Answer : Microwaves
Description : Endoscope is an instrument used to detect the ulcers in the stomach has a long narrow tube (with a small glowing bulb at one end) which is inserted in to the stomach through the mouth contains ... ) a narrow tube containing water (3) optical fibre (4) a narrow tube containing some chemical solution
Last Answer : optical fibre
Description : In an optical fibre the signal is transmitted (1) in a straight line path (2) In a curved path (3) due to total internal reflection (4) Due to refraction
Last Answer : due to total internal reflection
Description : State principle of optical fibre.
Last Answer : Principle: - Optical fibre works on the principle of total internal reflection.i.e.when a ray of light is passing through denser medium, is incident on the surface of rarer medium at an angle greater ... angle, the ray is totally reflected in a denser medium. This phenomenon is called as TIR.
Description : Inhalation of silica dust by human being during hand drilling in mica mining, lead & zinc mining, silica refractory manufacture and in foundries causes (A) Asphyxiation (suffocation) (B) Shortness of breath (C) Tuberculosis (D) All (A), (B) and (C)
Last Answer : (D) All (A), (B) and (C)
Description : Which of the following is the most widely used insulating material for steam carrying pipelines? (A) Ceramic fibre blanket (B) Glass wool and 85% magnesia (C) Vermiculite (D) Slag wool
Last Answer : (B) Glass wool and 85% magnesia
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 : Fibre glass is a composite material of (A) Glass fibre in a polymer matrix (B) Glass fibre in a metallic matrix (C) Polymer fibre in a glassy matrix (D) Both 'b' & 'c'
Last Answer : (A) Glass fibre in a polymer matrix
Description : Fibre reinforced plastic (FRP) are (A) Made of glass fibre and thermoplastic resins (B) Anisotropic (C) Made of thermosetting resin and glass fibre (D) Both 'b' & 'c'
Last Answer : Option D
Description : The type of high refractive index glass used in optical instruments is __________ glass. (A) Pyrex (B) Flint (C) Crookes (D) None of these
Last Answer : (B) Flint
Description : What is a photo receptor sensitive to color?
Last Answer : Feel Free to Answer
Description : Retina contains this photo sensitive pigment. (A) Rhodopsin (B) Opsin (C) Retinol (D) Malanin
Last Answer : Answer : A
Description : If a tree flowers thrice in a year (Oct, Jan and July) in Northern India, it is said to be (a) photo and thermo-insensitive (b) photo and thermo-sensitive (c) photosensitive but thermo-insensitive (d) thermosensitive but photo-insensitive
Last Answer : (a) photo and thermo-insensitive
Description : Chromatic dispersion can be eliminated by __________. ∙ A. using a monochromatic light source ∙ B. using a very small numerical aperture fiber ∙ C. using a graded-index fiber ∙ D. using a very sensitive photo detector
Last Answer : A. using a monochromatic light source
Description : A device based on photo electric effect is called a) Photo sensitive b) Photo diode c) Photo synthesis d) Photo cell
Last Answer : d) Photo cell
Description : Silica is used in _____. A. Plastic Making B. Glass Making C. Iron Making D. Wood Making
Last Answer : ANSWER: B
Description : Manufacturing Silica is used in _____. A. Plastic Making B. Glass Making C. Iron Making D. Wood Making
Description : Quartz is a crystalline form of - (1) Alumina (2) Glass (3) Silica (4) Limestone
Last Answer : (3) Silica Explanation: Quartz is made up of a continuous framework of SiO4 silicon-oxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall formula SiO2. Tridymite ... is a denser polymorph of quartz found in some meteorite impact sites and in metamorphic rocks.
Description : Percentage content of silica in window glass, is (A) 40 to 45 (B) 50 to 55 (C) 60 to 65 (D) 70 to 75
Last Answer : Answer: Option D