381. Which one is not the main objective of annealing
(A) soften the steel
(B) refine the grain structure
(C) relieve internal stresses
(D) improve brittleness
Answer: -improve brittleness
382. The portion of the piston below the ring section is known as
(A) Piston crown
(B) Oil ring
(C) Compression ring
(D) Piston skirt
Answer: -Piston skirt
383. Two blocks which are at different states are brought into contact with each other and allowed to reach a final state of thermal equilibrium. The final
attained is specified by the
(A) zeroth law of thermodynamics
(B) first law of thermodynamics
(C) second law of thermodynamics
(D) third law of thermodynamics
Answer: -zeroth law of thermodynamics
384. Which one of the following is the extensive property of a thermodynamic system?
(A) Volume
(B) Pressure
(C) Temperature
(D) Density
Answer: -Volume
385. Which one of the following thermodynamic processes approximates the steaming of food in a pressure cooker?
(A) Isenthalpic
(B) Isobaric
(C) Isochoric
(D) Isothermal
Answer: -Isochoric
386. Identify the correct statement for movement in lathe machine
(A) Longitudinal feed - through carriage movement
(B) Cross feed - through cross slide movement
(C) Angular feed - through top slide movement
(D) All of the above
Answer: -All of the above
387. For the same compression ratio or the same heat rejection, which power cycle
is more efficient?
(A) Diesel cycle
(B) Dual cycle
(C) Otto cycle
(D) None of the above
Answer: -Otto cycle
388. The advantages of cold working of metals, except
(A) Improve surface finish
(B) Closer dimensional
(C) Scale free and bright surface
(D) Refine the grain structure
Answer: -Refine the grain structure
390. The act of restoring the cutting face of a grinding wheel by removing the
abrasive materials from the cutting face and sides of the wheel is known as:
(A) Wheel truing
(B) Wheel dressing
(C) Wheel metal crushers
(D) None of these
Answer: -Wheel truing
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