cast iron
mild steel
brass
aluminium
✅ The correct answer is option A.
Mechanical Engineering MCQs
The forces, whose lines of action are parallel to each other and act in the same directions, are known as
coplaner concurrent forces
coplaner non-concurrent forces
like parallel forces
unlike parallel forces
✅ The correct answer is option C.
A receiver type compound engine, requires a lighter flywheel.
Yes
No
✅ The correct answer is option A.
The operating pressure for refrigerating units using R-12 as a refrigerant is
2 bar
8 bar
15 bar
30 bar
✅ The correct answer is option B.
During sensible cooling,
relative humidity remains constant
wet bulb temperature increases
specific humidity increases
partial pressure of va
✅ The correct answer is option D.
Supercharging is the process of supplying the intake air to the engine cylinder at a density __________ the density of the surrounding atmosphere.
equal to
less than
greater than
✅ The correct answer is option C.
The point of contraflexure occurs in
cantilever beams
simply supported beams
overhanging beams
fixed beams
✅ The correct answer is option C.
Which of the following refrigerant has the highest freezing point.
Ammonia
Carbon dioxide
Sulphur dioxide
R-12
✅ The correct answer is option B.
The fuels in order of decreasing knock tendency for spark ignition engines are
paraffins, aromatics, napthenes
paraffins, napthenes, aromatics
napthenes, aromatics, paraffins
napthenes, paraffins,
✅ The correct answer is option B.
In a reaction turbine
the steam is allowed to expand in the nozzle, where it gives a high velocity before it enters the moving blades
the expansion of steam takes place partly in the fixed blades and partly in the moving blades
the steam is expanded from a high pressure to a condenser pressure in one or more nozzles
the pressure and tempe
✅ The correct answer is option B.