__________ paint has the minimum absorption co-efficient.
(A) Black
(B) White lead
(C) Grey
(D) Light cream
Description : __________ paint has the maximum absorption coefficient. (A) Black (B) Yellow (C) White (D) Grey
Last Answer : (A) Black
Description : A tank painted with which of the following coloured paints, would heat up maximum by radiation from sun? (A) Yellow paint (B) White paint (C) Black paint (D) Grey paint
Last Answer : (C) Black paint
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 : Stefan-Boltzmann law applies to __________ body. (A) Black (B) White (C) Grey (D) Any colour
Description : The overall mass transfer co-efficient for the absorption of SO2 in air with dilute NaOH solution can be increased substantially by (A) Increasing the gas film co-efficient (B) Increasing the liquid film co-efficient (C) Increasing the total pressure (D) Decreasing the total pressure
Last Answer : (A) Increasing the gas film co-efficient
Description : A ray of white light strikes the surface of an object. If all the colours are reflected, the surface would appear (1) Black (2) White (3) Grey (4) Opaque
Last Answer : (2) White Explanation: Objects do not have any colour of their own. When light hits a surface, some of it is absorbed and some of it is reflected. The light that is reflected is ... appear white when they reflect all the wavelengths; they appear black when they absorb all visible wavelengths.
Description : Tanks used for the storage of petroleum products (which are inflammable) should be painted with a __________ paint. (A) Black (B) White (C) Red (D) Yellow
Last Answer : (B) White
Description : As the difference between the wall temperature and bulk temperature increases, the boiling heat transfer co-efficient (A) Continues to increase (B) Continues to decrease (C) Goes through a minimum (D) Goes through a maximum
Last Answer : (C) Goes through a minimum
Description : Out of the following refrigeration cycles, which one has the minimum COP (Co-efficient of performance)? (A) Air cycle (B) Carnot cycle (C) Ordinary vapour compression cycle (D) Vapour compression with a reversible expansion engine
Last Answer : A) Air cycle
Description : Give scientific reasons (in not more than four lines each) for the following: (i) Meat takes longer to cook on the mountains (ii) Water remains cool in earthen pitchers (iii) Ice and salt ... to sleep under trees during the night. (v) Greenhouse operators paint their glass roofs white in summer.
Last Answer : (i) Meat takes longer to cook on the mountains: The atmospheric pressure decreases as the altitude increases. The boiling point of water is 100 c at standard atmospheric pressure. At the mountains this ... of light to a maximum. And therefore white colour is painted on the roofs in the summer.
Description : __________ iron is produced, when molten pig iron is chilled suddenly. (A) White cast (B) Grey cast (C) Wrought (D) None of these
Last Answer : (A) White cast
Description : __________ iron is produced, when molten pig iron is allowed to cool gradually. (A) White cast (B) Grey cast (C) Wrought (D) None of these
Last Answer : (B) Grey cast
Description : __________ iron is produced by the annealing of white cast iron. (A) Malleable (B) Nodular (C) Ductile (D) Grey
Last Answer : (A) Malleable
Description : Annealing of white cast iron produces __________ iron. (A) Grey (B) Nodular (C) Malleable (D) Spheroidal
Last Answer : (C) Malleable
Description : __________ of grey cast iron produces white cast iron. (A) Tempering (B) Rapid heating (C) Rapid cooling (D) Slow cooling
Last Answer : Option B
Description : Fresh domestic sewage is __________ in color. (A) Grey (B) Dark brown (C) Red (D) Black
Last Answer : (A) Grey
Description : Which of the following equations as suggested by Colebrook and White gives the increase in roughness of a new surface (ε0 ) with age/time (t) (where, ε = roughness of the surface after time't'. α = a co-efficient to be experimentally determined ... ε = ε0 + α.t 2 (C) ε = ε0 + α.t 3 (D) ε = ε0 + α.t
Last Answer : (A) ε = ε0 + α.t
Description : An object which absorbs all colours and reflects none appears: (1) White (2) Grey (3) Blue (4) Black
Last Answer : (4) Black Explanation: A surface that absorbs all colours, reflecting none, is said to be black. Black is not a colour; it absorbs all the colours of the visible spectrum and reflects none of them to the eyes. White is a colour.
Description : Jai is having in his home four pet dogs named Saty, Jany, Rex, and Leo. The colors of the dogs are Brown, White, Grey and Black (not necessarily in the same order). The four dogs belong to different ... in color, then which dog belongs to pug breed? (a)Saty (b)Rex (c)Jany (d)Cannot be determined
Last Answer : (a)Saty
Description : Jai is having in his home four pet dogs named Saty, Jany, Rex, and Leo. The colors of the dogs are Brown, White, Grey and Black (not necessarily in the same order). The four dogs belong to ... Labrador breed. Which dog belongs to Labrador breed? (a)Saty (b) Leo (c)Jany (d)Cannot be determined
Last Answer : (d)Cannot be determined
Description : Jai is having in his home four pet dogs named Saty, Jany, Rex, and Leo. The colors of the dogs are Brown, White, Grey and Black (not necessarily in the same order). The four dogs belong to different breeds- ... the color of Alsatian dog? (a) Brown (b) Grey (c) Either(a)or(b) (d)None of these
Last Answer : (c) Either(a)or(b)
Description : Jai is having in his home four pet dogs named Saty, Jany, Rex, and Leo. The colors of the dogs are Brown, White, Grey and Black (not necessarily in the same order). The four dogs belong to different breeds- ... Pug, then what could be the color of Saty? (a) White (b) Black (c) Brown (d) Grey
Last Answer : Ans: option (b)
Description : Jai is having in his home four pet dogs named Saty, Jany, Rex, and Leo. The colors of the dogs are Brown, White, Grey and Black (not necessarily in the same order). The four dogs belong to different breeds- ... , then what could be its breed? (a) Labrador (b) Pug (c)Bull dog (d) None of these
Last Answer : (c)Bull dog
Description : Types of hackers as follows: a) White hat hacker b) Black hat hacker c) Grey hat hacker d) All of the above
Last Answer : d) All of the above
Description : ______ are the combination of both white as well as black hat hackers. a) Grey Hat hackers b) Green Hat hackers c) Blue Hat Hackers d) Red Hat Hackers
Last Answer : a) Grey Hat hackers
Description : Hackers who help in finding bugs and vulnerabilities in a system & don’t intend to crack a system are termed as ________ a) Black Hat hackers b) White Hat Hackers c) Grey Hat Hackers d) Red Hat Hacker
Last Answer : b) White Hat Hackers
Description : Which of the following statements best describes a white-hat hacker? A. Security professional B. Former black hat C. Former grey hat D. Malicious hacker
Last Answer : A. Security professional
Description : What is an grey hat hacker A)Black Hat Hacker B)White Hat Hacker C)Combination of White and black hat hackers D)None
Last Answer : C)Combination of White and black hat hackers
Description : . A security audit performed on the internal network of an organization by the network administration is also known as ___________. A. Grey-box testing B. Black-box testing C. White-box testing D. Active testing
Last Answer : C. White-box testing
Description : Which of the following statements best describes a white-hat hacker? A. Security professional B. Former black hat C. Former grey hat D. Malicious hacke
Description : Which type of hackers are invited by the software vendors to find the security flaws in their system? a. White hat hackers b. Black hat hackers c. Grey hat hackers d. Blue hat hackers
Last Answer : d. Blue hat hackers
Description : A security audit performed on the internal network of an organization by the network administration is also known as ___________. a. Grey-box testing b. Black-box testing c. White-box testing d. Active testing E. Passive testing
Last Answer : c. White-box testing
Description : Which of the following statement based describe a white hat hackers (a) Security professional (b) Former black hat (c) Former grey hat (d) Malicious hackers
Last Answer : (a) Security professional
Description : Banner grabbing is used for A. White Hat Hacking B. Black Hat Hacking C. Grey Hat Hacking D. Script Kiddies
Last Answer : A. White Hat Hacking
Description : The term cracker refers to_____ A. Black hat hacker. B. White hat hacker. C. Grey hat hacker. D. None of the above.
Last Answer : A. Black hat hacker.
Description : Which hacker refers to ethical hacker? A. Black hat hacker. B. White hat hacker. C. Grey hat hacker. D. None of the above.
Last Answer : B. White hat hacker.
Description : A security audit performed on the internal network of an organization by the network administration is also known as ___________. A. Grey-box testing B. Black-box testing C. White-box testing D. Active testing E. Passive testing
Description : ________ are the combination of both white as well as black hat hackers. a) Grey Hat hackers b) Green Hat hackers c) Blue Hat Hackers d) Red Hat Hackers
Description : A security audit performed on the internal network of an organization by the network administration is also known as ___________. ∙ A. Grey-box testing ∙ B. Black-box testing ∙ C. White-box testing ∙ D. Active testing ∙ E. Passive testing
Description : Behavioral testing is a) White box testing b) Black box testing c) Grey box testing d) None of the mentioned
Last Answer : Ans : b
Description : An object which absorbs all colours and reflects none appears: (1) white (2) grey (3) blue (4) black
Last Answer : black
Description : Addition of filter aid to the slurry before filtration is done to __________ of the cake. (A) Increase the porosity (B) Increase the compressibility co-efficient (C) Decrease the porosity (D) Decrease the compressibility co-efficient
Last Answer : (A) Increase the porosity
Description : A steel alloy containing 36% nickel is called __________, which has a zero co-efficient of expansion. (A) Austenitic stainless steel (B) Heat resisting steel (C) Invar (D) High speed steel
Last Answer : (C) Invar
Description : The rough value of diffusion co-efficient of water vapor into air at 25°C may be about __________ cm2 /sec. (A) 0.25 (B) 2.5 (C) 1.25 (D) 0.0025
Last Answer : (A) 0.25
Description : The solvent used in liquid-liquid extraction should have __________ less than one. (A) Selectivity (B) Distribution co-efficient (C) Both (A) and (B) (D) Neither (A) nor (B)
Last Answer : (D) Neither (A) nor (B)
Description : Mass transfer co-efficient is directly proportional to DAB 0.5 , according to __________ theory. (A) Penetration (B) Surface renewal (C) Film (D) None of these
Last Answer : (A) Penetration
Description : Mass transfer co-efficient is directly proportional to DAB according to the __________ theory. (A) Film (B) Penetration (C) Surface-renewal (D) None of these
Last Answer : (A) Film