MECHANICAL ENGINEERING MCQ SECTION 23

221. Crater wear occurs mainly due to following phenomena

(A) Abrasion

(B) Diffusion

(C) Oxidation

(D) Adhesion

Answer: - Diffusion

crater wear in which contact with chips erodes the rake face.

222.Cutting force and power involved in a machine tool can be measured by using

(A) Pyrometer

(B) Comparator

(C) Transducer

(D) Dynamometer

Answer: - Dynamometer

223.In ECM, the material removal is due to

(A) Corrosion

(B) Erosion

(C) Fusion

(D) Ion displacement

Answer: - Ion displacement

224. Green sand mould indicates that

(A) Polymeric mould has been cured

(B) Mould has been totally dried

(C) Mould is green in colour

(D) Mould contains moisture

Answer: - Mould contains moisture

225.A twist drill is a

(A) Side cutting tool

(B) Front cutting tool

(C) End cutting tool

(D) None of these

Answer: - End cutting tool

226.The ductile materials, during machining, produce

(A) Continuous chips

(B) Discontinuous chips

(C) Continuous chips with built up edge

(D) Either A or C

Answer: - Either A or C

227.A fluid is said to be ideal, if it is

(A) incompressible

(B) viscous and incompressible

(C) inviscous and compressible

(D) inviscous and incompressible

Answer: - inviscous and incompressible

228. A steam nozzle covert

(A) heat energy of steam into kinetic energy

(B) potential energy of steam into kinetic energy

(C) kinetic energy of steam into mechanical energy

(D) heat energy of steam into mechanical energy

Answer: - heat energy of steam into kinetic energy

229. Most high speed compression engines operate on

(A) Diesel cycle

(B) Otto cycle

(C) Dual combustion cycle

(D) Special type of air cycle

Answer: - Dual combustion cycle

230. The ratio of limiting friction and normal reaction is known as

(A) coefficient of friction

(B) angle of friction

(C) angle of repose

(D) sliding friction

Answer: - coefficient of friction