Yes
No
✅ The correct answer is option A.
Mechanical Engineering MCQs
The ratio of the work obtained at the crankshaft in a given time to the energy supplied during the same time is called
mechanical efficiency
overall efficiency
indicated thermal efficiency
volumetric efficiency
✅ The correct answer is option B.
When tc1 and tc2 are the temperatures of cold fluid at entry and exit respectively and th1 and th2 are the temperatures of hot fluid at entry and exit point, and cold fluid has lower heat capacity rate as compared to hot fluid, then effectiveness of the heat exchanger is given by
✅ The correct answer is option D.
If the tearing efficiency of a riveted joint is 50%, then the ratio of diameter of rivet to the pitch is
0.2
0.3
0.5
0.7
✅ The correct answer is option C.
When two shafts of same length, one of which is hollow, transmit equal torques and have equal maximum stress, then they should have equal
polar moment of inertia
polar modulus
diameter
angle of twist
✅ The correct answer is option B.
For a perfect gas, according to Boyle’s law (where p = Absolute pressure, v = Volume, and T = Absolute temperature)
p v = constant, if T is kept constant
v/T = constant, if p is kept constant
p/T = constant, if v is kept constant
T/p = constant, if v i
✅ The correct answer is option A.
The maximum bending moment of a cantilever beam of length l and carrying a uniformly distributed load of w per unit length lies at the middle of its length.
TRUE
FALSE
✅ The correct answer is option B.
The process of inducing carbon to __________ carbon steels in order to give it a hard surface is known as carburising.
low
medium
high
✅ The correct answer is option A.
The purpose of a cylinder head gasket is to
prevent the combustion gases from leaking from the joint between the cylinder block and the cylinder head
prevent engine oil from going into combustion chamber
removes impurities from cylinder head lubricating oil
none of the above
✅ The correct answer is option A.
In a reaction turbine when the degree of reaction is zero, then there is
no heat drop in moving blades
no heat drop in fixed blades
maximum heat drop in moving blades
maximum heat drop in f
✅ The correct answer is option A.