Multiple Choice Questions (MCQ) on Mechanical Engineering
67-The output of a diesel engine can be increased without increasing the engine revolution or size in the following way
(A) feeding more fuel
(B) heating incoming air
(C) scavenging
(D) supercharging
68-A-B-C analysis is used in
(A) CPM
(B) PERT
(C) Inventory control
(D) All of above
69-Heat transfer in liquid and gases takes place by
(A) conduction
(B) convection
(C) radiation
(D) conduction and convection
70-Which of the following welding process does not require any consumable?
(A) Gas welding
(B) Electroslag welding
(C) Friction stir welding
(D) Thermit welding
71-The rolling of metal foils is usually carried out in a
(A) two high rolling mill
(B) three high rolling mill
(C) four high rolling mill
(D) cluster rolling mill
72-The longest cylindrical job can be produced by
(A) sand casting
(B) continuous casting
(C) investment casting
(D) powder metallurgy
73-In EDM which factor is essential?
(A) Workpiece should be conductor of heat
(B) Workpiece should be magnetic
(C) Workpiece should be conductor of electricity
(D) Workpiece should be non-magnetic
74-Permanent mould is used in the following casting processes
(A) ceramic mould casting
(B) investment casting
(C) CO2 casting
(D) none of the above
75-Which abrasive is generally used for super abrasive grinding?
(A) SiC
(B) Al2O3
(C) CBN
(D) None of these
76-In ASA system, if the tool nomenclature if 8-6-5-5-10-15-2mm, then the side rake angle will be
(A) 5°
(B) 6°
(C) 8°
(D) 10°
77-A moving mandrel is used in
(A) wire drawing
(B) tube drawing
(C) metal cutting
(D) forging
ANSWERS:
67-(D), 68-(C), 69-(B), 70-(C), 71-(D), 72-(B), 73-(C), 74-(A), 75-(C), 76-(C), 77-(B)