⚙️Mechanical Engineering MCQs
Mechanical Engineering MCQs
488 MCQs141
Capillary action is due to the_________________?
Asurface tension
Bcohesion of the liquid
Cadhesion of the liquid molecules and the molecules on the surface of a solid
Dall of the above E. none of the above
142
The rise or depression of liquid in a tube due to surface tensionwim increase in size of tube will________________?
Aincrease
Bremain unaffected
Cmay increase or decrease depending on the characteristics of liquid
Ddecrease E. unpredictable
143
An ideal flow of any fluid must fulfill the following____________________?
ANewton’s law of motion
BNewton’s law of viscosity
CPascal’ law
DContinuity equation E. Boundary layer theory
144
In a static fluid ___________________?
Aresistance to shear stress is small
Bfluid pressure is zero
Clinear deformation is small
Donly normal stresses can exist E. viscosity is nil
145
Bell metal contains_____________________?
A70% copper and 30% zinc
B90% copper and 10% tin
C85-92% copper and rest tin with little lead and nickel
D70-75% copper and rest tin E. 70-75% copper and rest zinc and tin
146
The correct sequence for descending order of machinability is _____________________?
Agrey cast iron, low carbon steel, wrought iron
Blow carbon steel, grey cast iron, wrought iron
Cwrought iron,low carbon steel, grey cast iron
Dwrought iron, grey cast iron, low carbon steel E. grey cast iron, wrought iron, low carbon steel
147
Aluminium bronze contains aluminium and copper in the ratio of___________________?
A50 : 50
B40 : 60
C60 : 40
D10 : 90 E. 90 : 10
148
Muntz metal contains copper and zinc in the ratio of________________?
A50 : 50
B40 : 60
C60 : 40
D20 : 80 E. 80 : 20
149
Perminvar alloy having constant permeability is an alloy of________________?
Anickel, copper and iron
Bnickel, copper and zinc
Ccopper, nickel and antimony
Diron, zinc and bismuth E. antimony, copper and zinc
150
Monel metal contains_________________?
A63 to 67% nickel and 30% copper
B88% copper and 10% tin and rest zinc
Calloy of tin, lead and cadmium
Dmalleable iron and zinc E. none of the above