low frontal area
higher thrust
high pressure rise
none of these
✅ The correct answer is option A.
Compressors
The speed of rotary air compressor is __________ as compared to reciprocating air compressor.
high
low
✅ The correct answer is option A.
For minimum work required to compress and deliver a quantity of air by multi-stage compression,
the compression ratio in each stage should be same
the intercooling should be perfect
the workdone in each stage should be same
all of the above
✅ The correct answer is option D.
In a centrifugal compressor, the flow of air is __________ to the axis of compressor.
parallel
perpendicular
inclined
none of these
✅ The correct answer is option B.
In a jet engine, the air-fuel ratio is
30:01:00
40:01:00
50:01:00
60:01:00
✅ The correct answer is option D.
Gas turbine as compared to internal combustion engine
can be driven at a very high speed
produces uniform torque
has more efficiency
all of these
✅ The correct answer is option D.
In a centrifugal compressor, the air enters the impeller axially and leaves the vane radially.
Yes
No
✅ The correct answer is option B.
When the outlet angle from the rotor of a centrifugal compressor is more than 90°, then the blades are said to be
forward curved
backward curved
radial
none of these
✅ The correct answer is option A.
In a double acting compressor, the air is compressed
in one cylinder
in two cylinders
in a single cylinder on both sides of the piston
in two cylinders on bo
✅ The correct answer is option C.
The ratio of the isentropic work to the Euler’s work is known as pressure coefficient.
Yes
No
✅ The correct answer is option A.