371.At resonance, the amplitude of vibration is
(A) Very large
(B) Small
(C) Zero
(D) Depends upon frequency
Answer: -Very large
372. An ideal fluid
(A) Has no viscosity
(B) Satisfies the relationship (pv = RT)
(C) Obey the Newton's law of viscosity
(D) Is both incompressible and non viscous
Answer: -Is both incompressible and non viscous
373. Surface tension is a phenomenon due to
(A) Viscous force
(B) Cohesion between the liquid molecules
(C) Adhesion between the liquid and solid molecules
(D) Adhesion and cohesion both
Answer: -Cohesion between the liquid molecules
374. One torr pressure is equivalent to
(A) 1 mm of Hg
(B) 1 atmosphere
(C) 1 Pascal
(D) 10 m of water
Answer: -1 mm of Hg
375. Euler’s dimensionless number relates
(A) Inertia and gravity force
(B) Viscous and inertia force
(C) Pressure and inertia force
(D) Buoyant and viscous force.
Answer: -Pressure and inertia force
376. According to Indian Standards., total number of tolerance grades are
(A) 8
(B) 12
(iii) 18
(D) 20
Answer: -18
377. In designing a sleeve and cotter joint, the outside diameter of the sleeve is taken as, where d is diameter of the rod
(A) 1.5 d
(B) 2.5 d
(C) 3 d
(D) 4 d
Answer: -2.5 d
378. What is the value of Poisson’s ratio for steel
(A) 0.25 to 0.33
(B) 0.5 to 0.66
(C) 0.75 to 0.85
(D) 0.10 to 0.16
Answer: -0.25 to 0.33
379. What is the effect of adding Phosphorus in cast iron
(A) Improve hardness
(B) Improve brittleness
(C) Reduce hardness
(D) Improve fluidity
Answer: -Improve fluidity
380. The carbon % carry by the dead mild steel are in the order of
(A) 0.45 to 0.8
(B) 0.85 to 1.0
(C) Up to 0.15
(D) None of these
Answer: -Up to 0.15
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