Description : Pick out the wrong statement. (A) Metal/alloys having hexagonal crystal lattice structure are less malleable than those having cubic crystal lattice structure (B) Metal/alloys having body centred cubic ... D) Both ferritic & austenitic stainless steel has a face centred cubic (fcc) crystal structure
Last Answer : (C) Tungsten has a body centred cubic (bcc) crystal lattice structure
Description : Out of the following, the lowest packing of atoms exists in __________ crystal lattice structure. (A) Hexagonal close, packed (hcp) (B) Face centred cubic (fcc) (C) Body centred cubic (bcc) (D) Simple cubic
Last Answer : (D) Simple cubic
Description : Nickel as a material of construction (A) Is used as an alloying element for both ferrous & non-ferrous alloys (B) Is paramagnetic below 415° C (its Curie temperature) (C) Diamagnetic (D) Has a body centred cubic (bcc) crystal lattice structure
Last Answer : (A) Is used as an alloying element for both ferrous & non-ferrous alloys
Description : Materials having __________ lattice structure are usually most ductile. (A) FCC (B) BCC (C) HCP (D) Cubic
Last Answer : (A) FCC
Description : Closeness of packing is maximum in case of __________ crystal lattice. (A) Face centred (B) Simple cubic (C) Body centred (D) None of these
Last Answer : (A) Face centred
Description : Which of the following crystal structures characterises the austenitic stainless steel? (A) Simple hexagonal (B) Body centred cubic (C) Face centred cubic (D) None of these
Last Answer : (C) Face centred cubic
Description : Which of the following crystal structures characterises the ferritic stainless steel? (A) Face centred cubic (B) Body centred cubic (C) Simple hexagonal (D) None of these
Last Answer : (B) Body centred cubic
Description : Most of the common metals have __________ crystal structure. (A) Cubic (B) Hexagonal (C) Orthorhombic (D) None of these
Last Answer : (A) Cubic
Description : How many molecules per unit cell are there in a face centred cubic lattice? (A) 2 (B) 4 (C) 6 (D) 8
Last Answer : (B) 4
Description : The crystal structure of most of the common metals is (A) Orthorhombic (B) Cubic (C) Hexagonal (D) None of these
Last Answer : (B) Cubic
Description : How many atoms are there per unit cell in a body centred cubic lattice system? (A) 6 (B) 5 (C) 3 (D) 2
Last Answer : (D) 2
Description : Cementite is (A) Fe3C chemically (B) A compound of carbon and iron (C) Characterised by an orthorhombic crystal structure (D) All (A), (B) and (C)
Last Answer : (D) All (A), (B) and (C)
Description : How many number of molecules per unit cell which crystallizes in the form of end face centred (monoclinic) lattice with a molecule at each lattice.
Last Answer : 2.
Description : Give one example of metal classified as per structure as BCC, FCC, HCP and CCP.
Last Answer : BCC (body centred cubic) structure—Molybdenum FCC (face centred cubic) structure—Aluminium HCP (hexagonal closed packed) structure—Zinc CCP (cubic dosed packed) structure-Copper.
Description : Give One Example Of Metal Classified As Per Structure As Bcc, Fcc, Hcp And Ccp?
Last Answer : Examples of BCC, FCC, HCP and CCP structures: BCC (Body Centred Cubic) structure – molybdenum; FCC (Face Centred Cubic) structure – Aluminum; HCP (Hexagonal Close Packed) structure – Zinc; CCP (Cubic Close Packing) structure – Copper.
Description : Cubic crystals containing lattice points only at the corners are called: w) body centered x) face centered y) simple z) hexagonal
Last Answer : ANSWER: C-SIMPLE
Description : Pure nickel is (A) Ferromagnetic above its curie point (i.e., 415°C) (B) Having h.c.p. crystal lattice (C) Ferromagnetic at room temperature (D) Not resistant to oxidation at high temperature
Last Answer : (C) Ferromagnetic at room temperature
Description : How many atoms per unit cell are in a face-centered-cubic crystal? w) two x) four y) six z) eight
Last Answer : ANSWER: X -- FOUR
Description : The ratio of spacing (d) for for simple cubic lattice, d(100) :d(110) :d(111) a. 1 : 0.707: 0.669 b. 1: 1.414: 0.577 c. 1: 0.707 : 0.577 d. 1: 0.707 : 1.154
Last Answer : c. 1: 0.707 : 0.577
Description : The crystal of diamond shines due to (a) High density (b) Total internal reflection (c) Crystal lattice (d) None of these
Last Answer : Ans:(b)
Description : A smallest three dimensional part of a crystal lattice is called. a) A particle b) A molecules c) A unit cell d) An atom
Last Answer : c) A unit cell
Description : Which class of solids could have London Forces the attractive forces between particles in crystal lattice positions? w) ionic x) covalent y) metallic z) molecular
Last Answer : ANSWER: Z -- MOLECULAR
Description : The type of crystal lattice exemplified in a diamo is: w) ionic crystal x) covalent network crystal y) metallic crystal z) covalent molecular crystal
Last Answer : ANSWER: X -- COVALENT NETWORK CRYSTAL
Description : Select the correct statement(s) about FCC (ABCAB...) structure.
Last Answer : Select the correct statement(s) about FCC (ABCAB...) structure. A. Distance between nearest octahedral void and ... and B is 2r `sqrt((2)/(3))`
Description : There are ....... lines of symmetry in cubic crystal. a. 3 b. 13 c. 9 d. 6
Last Answer : b. 13
Description : In the fluid catalytic cracker (FCC), the cracking reaction is __________ (i) and the regeneration is__________ (ii) __________. (A) (i) exothermic (ii) endothermic (B) (i) exothermic (ii) exothermic (C) (i) endothermic (ii) endothermic (D) (i) endothermic (ii) exothermic
Last Answer : (D) (i) endothermic (ii) exothermic
Description : __________ is added in stainless steel to prevent inter crystal corrosion. (A) Vanadium (B) Niobium (C) Chromium (D) Nickel
Last Answer : (B) Niobium
Description : Dilute sulphuric acid is transported in __________ pipes. (A) Mild steel (B) Lead (C) Copper (D) Special alloys
Last Answer : (B) Lead
Description : Mild steel is a/an __________ steel. (A) Low carbon (B) Medium carbon (C) High carbon (D) High alloy
Last Answer : (A) Low carbon
Description : Lead is poured into the joint between two- __________ pipes. (A) Mild steel (B) Concrete (C) Cast iron (D) Asbestos cement
Last Answer : (C) Cast iron
Description : __________ is the most suitable lubricant for drawing mild steel wires? (A) Kerosene (B) Water (C) Sodium stearate (D) Lime water
Last Answer : (C) Sodium stearate
Description : On being hit with a hammer, __________ will readily fracture. (A) Brass (B) Mild steel (C) Cast iron (D) Lead
Last Answer : C) Cast iron
Description : Out of the following, the __________ pipe has the least corrosion resistance. (A) Mild steel (B) Copper (C) Cast iron (D) Wrought iron
Last Answer : D) Wrought iron
Description : Lead is poured into the joint between two __________ pipes. (A) Mild steel (B) Concrete (C) Cast iron (D) Asbestos cement
Last Answer : Option C
Description : __________ is used as a material of construction for the blade of power saw. (A) Wrought iron (B) Stainless steel (C) Mild steel (D) High speed steel
Last Answer : Option D
Description : C and Si both have same lattice structure, having 4 bonding electrons in each. However, C is insulator where as Si is intrinsic semiconductor. This is because (1) The four bonding electrons in the case of C ... the case of C lie in the second orbit, whereas in the case of Si they lie in the third
Last Answer : (4) The four bonding electrons in the case of C lie in the second orbit, whereas in the case of Si they lie in the third
Description : What organization has published safety guidelines for the maximum limits of RF energy near the human body? A. The American National Standards Institute (ANSI). B. The Environmental Protection ... Communications Commission (FCC). D. The Institute Of Electrical and Electronics Engineers (IEEE).
Last Answer : A. The American National Standards Institute (ANSI).
Description : How many neighboring atoms are in contact with eac atom in a monatomic body-centered cubic structure. w) 4 x) 6 y) 8 z) 12
Last Answer : ANSWER: Y -- 8
Description : The co-ordination number in simple cubic structure is (A) 4 (B) 6 (C) 8 (D) 12
Last Answer : (B) 6
Description : Which of the following materials may prove unsuitable for handling acetic acid (glacial & anhydrous) at 40°C? (A) Silicone rubber, teflon, porcelain and wood (B) Nickel, monel, stainless steel and graphite (C) Aluminium, copper, high silicon iron (D) Brass, cast iron, mild steel and tin
Last Answer : (D) Brass, cast iron, mild steel and tin
Description : The preferred material of construction for storage tanks for 98% sulphuric acid is (A) Aluminium (B) Lead (C) Stainless steel 316 (D) Mild steel
Description : Plate and frame filter press is usually made of (A) Mild steel (B) Cast iron (C) Stainless steel (D) Galvanised iron
Last Answer : (B) Cast iron
Description : Which of the following has the least carbon percentage? (A) Low carbon steel (B) Mild steel (C) Wrought iron (D) White cast iron
Last Answer : (C) Wrought iron
Description : Carbon percentage is the same in cast iron and (A) Wrought iron (B) Pig iron (C) Mild steel (D) High silicon (14%) iron
Last Answer : (B) Pig iron
Description : Which one is remelted and poured into moulds to get cast iron? (A) Wrought iron (B) Pig iron (C) Low carbon steel (D) Mild steel
Description : Hammers and railway rails are normally made of (A) Mild steel (B) Dead mild steel (C) Medium carbon steel (D) High carbon stee
Last Answer : (D) High carbon stee
Description : Mild steel is used for making (A) Fish plates (B) Die block (C) Channels (D) Drop forging
Last Answer : (C) Channels
Description : Acetaldehyde is produced by hydration of acetylene in a sulphuric acid solution of mercuric sulphate. Hydration tower is made of (A) Rubber lined mild steel (B) Lead lined mild steel (C) Aluminium (D) Cast iron
Last Answer : (A) Rubber lined mild steel
Description : Tank furnace used for melting of glass is made of (A) Mild steel (B) Cast iron (C) Refractory blocks (D) Stainless steel
Last Answer : (C) Refractory blocks