✅ The correct answer is option B.
Mechanical Engineering MCQs
Thermal efficiency of a two stroke cycle engine is __________ a four stroke cycle engine.
equal to
less than
greater than
✅ The correct answer is option B.
The working pressure and temperature inside the cylinder of an internal combustion engine is __________ as compared to a steam engine.
low
very low
high
very high
✅ The correct answer is option D.
The gas constant (R) is equal to the
sum of two specific heats
difference of two specific heats
product of two specific heats
ratio of two specific
✅ The correct answer is option B.
A steam pipe is to be lined with two layers of insulating materials of different thermal conductivities. For the minimum heat transfer,
the better insulation must be put inside
the better insulation must be put outside
one could place either insulation on either side
one should take into a
✅ The correct answer is option A.
Briquetted coal is produced from the finely ground coal by moulding under pressure with or without a binding material.
TRUE
FALSE
✅ The correct answer is option A.
Two blocks A and B of masses 150 kg and 50 kg respectively are connected by means of a string as shown in the below figure. The tension in all the three strings __________ be same.
will
will not
✅ The correct answer is option A.
In __________ operation, the cutting force is maximum when the tooth begins its cut and reduces it to minimum when the tooth leaves the work.
up milling
down milling
face milling
end milling
✅ The correct answer is option B.
D’ Alembert’s principle basically depends upon Newton’s second law of motion.
Correct
Incorrect
✅ The correct answer is option A.
The rotating shafts tend to vibrate violently at whirling speeds because
the system is unbalanced
bearing centre line coincides with the axis
the shafts are rotating at very high speeds
resonance is caused du
✅ The correct answer is option D.