Kerala SET Exam General Paper Preparation Daily PYQ Practice 04



A) (i)–a, (ii)–b, (iii)–d, (iv)–c
B) (i)–b, (ii)–d, (iii)–a, (iv)–c
C) (i)–a, (ii)–c, (iii)–b, (iv)–d
D) (i)–c, (ii)–b, (iii)–a, (iv)–d

 

  1. Bronze → Copper + Tin → (b)
  2. Brass → Copper + Zinc → (d)
  3. Gun Metal → Copper + Tin + Zinc → (a)
  4. Nickel Steel → Iron + Nickel + Carbon → (c)


(i) Bronze — (b) Copper + Tin
Bronze is the classical copper–tin alloy. Adding tin to copper increases hardness and strength compared with pure copper, improves wear resistance and casting properties. Bronze has been used for coins, statues, bearings, bushings and many historical tools (hence the “Bronze Age”). (Note: there are many bronze varieties that include small amounts of other elements, but the defining pair is copper + tin.)

(ii) Brass — (d) Copper + Zinc
Brass is an alloy of copper and zinc. Zinc increases ductility and machinability of copper and changes color to a more yellow/gold tone. Brasses are widely used for decorative items, plumbing fittings, musical instruments, valves and fasteners because they are easier to form and polish than bronze.

(iii) Gun Metal — (a) Copper, Zinc and Tin
Gun metal is a specific kind of bronze that contains copper, tin and a small amount of zinc. It was traditionally used for making guns, gears, bearings and other cast, wear-resistant parts because the tin gives strength and wear resistance while zinc (in small amounts) improves fluidity and machinability. A common approximate composition sometimes quoted is ~88% Cu, ~10% Sn, ~2% Zn (values vary by formulation).

(iv) Nickel Steel — (c) Iron, Nickel, Carbon
Nickel steel is a steel alloy (base = iron + carbon) with nickel added. Nickel improves toughness, tensile strength and impact resistance of steel. Nickel steels are used where high strength and toughness are required (railroad components, shafts, structural parts, some armors and high-strength machine elements). 

Ans) B) (i)–b, (ii)–d, (iii)–a, (iv)–c


02 )  Which is the correct order?

A) Phylum - Class - Genus - Order - Species

B) Class - Phylum - Genus - Order - Species

C) Phylum - Class - Order - Genus - Species

D) Phylum - Class - Order - Species - Genus

Biological classification (taxonomic hierarchy) arranges groups from broadest to most specific. The standard sequence (most commonly used) is:

Domain > Kingdom > Phylum > Class > Order > Family > Genus > Species

The options in the question give a subset of those ranks. Reading from broader to narrower, a phylum contains one or more classes; a class contains one or more orders; an order contains families; a family contains genera; and a genus contains one or more species. Therefore the correct descending order in the choices is Phylum → Class → Order → Genus → Species, which is option C.

Ans) C) Phylum - Class - Order - Genus - Species