suction pressure
vacuum pressure
negative gauge pressure
all of these
✅ The correct answer is option D.
Mechanical Engineering MCQs
The type of rotary compressor used in gas turbines, is of
centrifugal type
axial flow type
radial flow type
none of these
✅ The correct answer is option B.
Strain rosettes are used to
measure shear strain
measure linear strain
measure volumetric strain
relieve strain
✅ The correct answer is option B.
The clearance volume in the compressor is kept minimum because it effects on volumetric efficiency.
Correct
Incorrect
✅ The correct answer is option A.
In submerged arc welding, an arc is produced between a
carbon electrode and the work
metal electrode and the work
bare metal electrode and the work
two tungsten electrodes and the work
✅ The correct answer is option C.
The basic requirement of a good combustion chamber is
minimum turbulence
low compression ratio
high thermal efficiency and power output
low volumetric efficiency
✅ The correct answer is option C.
In a centrifugal compressor, an increase in speed at a given pressure ratio causes
increase in flow
decrease in flow
increase in efficiency
increase in flow and decrease in efficiency
✅ The correct answer is option D.
The machining of titanium is difficult due to
high thermal conductivity of titanium
chemical reaction between tool and work
low tool-chip contact area
none of these
✅ The correct answer is option C.
A safety valve mainly used with locomotive and marine boilers is
lever safety valve
dead weight safety valve
high steam and low water safety valve
spring loaded safety valve
✅ The correct answer is option D.
The algebraic sum of the resolved parts of a number of forces in a given direction is equal to the resolved part of their resultant in the same direction. This is known as
principle of independence of forces
principle of resolution of forces
principle of transmissibility of forces
none of these
✅ The correct answer is option B.