σ sin θ
σ cos θ
σ sin 2θ
σ cos 2θ
✅ The correct answer is option B.
Mechanical Engineering MCQs
The tensile test is carried on __________ materials.
ductile
brittle
malleable
plastic
✅ The correct answer is option A.
In the relation VTn = C, the value of n for ceramic tools is
0.1 to 0.2
0.20 to 0.25
0.25 to 0.40
0.40 to 0.55
✅ The correct answer is option D.
In electro-chemical machining, the gap between the tool and work is kept as
0.1 mm
0.25 mm
0.4 mm
0.75 mm
✅ The correct answer is option D.
The limestone in the charge of a blast furnace decomposes to give lime and carbon dioxide. The lime thus obtained
controls the grade of pig iron
acts as an iron-bearing mineral
supplies heat to reduce ore and melt the iron
forms a slag by combin
✅ The correct answer is option D.
When the lower temperature of a refrigerating machine is fixed, then the coefficient of performance can be improved by
operating the machine at higher speeds
operating the machine at lower speeds
raising the higher temperature
lowering the higher te
✅ The correct answer is option D.
The pressure of steam __________ while flowing through a nozzle.
increases
decreases
remains constant
✅ The correct answer is option B.
In larger industrial and commercial reciprocating compression systems, refrigerent widely used is
ammonia
carbon dioxide
sulphur dioxide
R-12
✅ The correct answer is option A.
The process of removing metal by a cutter which is rotated in the same direction of travel of workpiece, is called
up milling
down milling
face milling
end milling
✅ The correct answer is option B.
The overall coefficient of heat transfer is used in problems of
conduction
convection
radiation
conduction and convect
✅ The correct answer is option D.