⚙️Mechanical Engineering MCQs
Mechanical Engineering MCQs
488 MCQs151
DuraJomin contains___________________?
A94% aluminium, 4% copper and 0.5% Mn, Mg, Si and Fe
B92.5% aluminium, 40% copper, 2% nickel, and 1.5% Mg
C10% aluminium and 90% copper
D90% magnesium and 9% aluminium with some copper E. 94% aluminium and 6% tin
152
Phosphor bronze contains____________________?
A0.5% of phosphorous
B1% phosphorous
C2.5% phosphorous
D5% phosphorous E. none of the above
153
Delta metal is an alloy of__________________?
Acopper, zinc and iron
Biron, nickel and copper
Ciron, lead and tin
Diron, aluminium and magnesium E. copper, zinc and antimony
154
Which of the following alloys does not contain tin_________________?
Awhite metal
Bsolder admiralty
Cfusible metal
Dphosphor bronze E. gun metal
155
Addition of copper to aluminium results in_____________________?
Aimprovement of casting characteristics
Bimprovement of corrosion resistance
Cone of the best known age and precipitation-hardening systems
Dimproving machinability E. none of the above
156
Elinvar, an alloy used in precision instruments, hair springs for watches, etc. contains the following element as principal alloying element__________________?
Airon
Bcopper
Caluminium
Dzinc E. nickel
157
A liquid compressed in cylinder has a volume of 0.04 m3 at 50 kg/cm2 and a volume of 0.039 m3 at 150 kg/cm2. The bulk modulus of elasticity of liquid is___________________?
A400 kg/cm2
B4000 kg/cm2
C40 x 105 kg/cm2
D40 x 106 kg/cm2 E. none of the above
158
Surface tension__________________?
Aacts in the plane of the interface normal to any line in the surface
Bis also known as capillarity
Cis a function of the curvature of the interface
Ddecreases with fall in temperature E. has no units
159
A balloon lifting in air follows the following principle_____________________?
Alaw of gravitation
BArchimedes principle
Cprinciple of buoyancy
Dall of the above E. continuity equation
160
The bulk modulus of elasticity with increase in pressure__________________?
Aincreases
Bdecreases
Cremains constant
Dincreases first up to certain limit and then decreases E. unpredictable