MCQs and tricks for competition exam.

  1) Which of the following metal alloys is used to make parts of aeroplane?:- A) Duralumin B) German silver C) Brass D) Stainless steel Ans:- A) Duralumin 2) Constituents of Gun metal are:- A) Sn - 40%, Cu - 50%, Zn - 10% B) Sn - 50%, Cu - 30%, Zn - 20% C) Sn - 20%, Cu - 70%, Zn - 10% D) Sn - 10%, Cu - 88%, Zn - 2% Ans:- D) Sn - %, Cu - 88%, Zn - 2% 3) Percentage of Tungsten present in 18-4-1 high speed steel is :- A) 18% B) 4% C) 1% D) 10% Ans:- A) 18% 4) Brass is the alloy of:- A) Copper and Nickel B) Copper and Zinc C) Copper and Tin D) Copper and Aluminium Ans:- B) Copper and Zinc 5) Bronze is the alloy of:- A) Copper and Aluminium B) Copper and Nickel C) Copper and Iron D) Copper and Tin Ans:- D) Copper and Tin 6) Stainless steel is the mixture of :- A) Iron, Chromium,Tin, Carbon B) Iron, Chromium, Nickel, Carbon C) Iron, Chromium, Nickel, Nitrogen C) Iron, Chromium, Nickel, Zinc Ans:- B) Iron, Chromium, Nickel, Carbon 7) Which of the following components of Stainless steel a...