A) Cementite B) Austenite C) Pearlite D) Ferrite. Ans : (B)
A) calcium, magnesium and aluminium B) aluminium, copper and lead C) cobalt, antimony and bismuth D) chromium, tungsten and molybdenum. Ans : (C)
A) atoms distributed in random pattern B) different crystal structure at different temperatures C) fixed structures at all temperatures D) none of the above. Ans : (B)
A) Polyurethane B) Polyster C) Nylon D) Acetal. Ans : (B)
A) Gamma iron B) Alpha iron C) Beta iron D) Delta iron. Ans : (B)
A) high resistivity B) high resistance to erosion C) good thermal conductivity D) high melting point. Ans : (A)
A) Polyster B) Phenolic C) Silicon D) PVC. Ans : (D)
A) composition of the material B) steepness of the waveform of the applied voltage C) shape of the waveform of applied voltage D) all of the above. Ans : (D)
A) 500o C B) 900o C C) 1100o C D) 1500o C. Ans : (A)
A) photons are emitted B) no electrons are emitted C) electrons of higher energy are emitted D) electrons of lower energy are emitted. Ans : (B)