low velocity
high velocity
low pressure
high pressure
✅ The correct answer is option C.
Mechanical Engineering MCQs
In a turbo jet engine, subsequent to heat addition to compressed air, to get the power output, the working substance is expanded in
exit nozzle, which is a constant volume process
exit nozzle, which is essentially an isentropic process
turbine blades, which is a constant volume process
turbine blades, which
✅ The correct answer is option D.
If a pitot tube is placed with its nose upstream, downstream or sideways, the reading will be the same in every case.
TRUE
FALSE
✅ The correct answer is option B.
According to Indian standards, the diameter of rivet hole is made larger than the basic size of rivet by
0.5 mm upto rivet diameter of 24 mm
1 mm for rivet diameter from 27 mm to 36 mm
2 mm for rivet diameter from 39 mm to 48 mm
all of the above
✅ The correct answer is option C.
A mixture of gas expands from 0.03 m3 to 0.06 m3 at a constant pressure of 1 MPa and absorbs 84 kJ of heat during the process. The change in internal energy of the mixture is
30 kJ
54 kJ
84 kJ
114 kJ
✅ The correct answer is option B.
The maximum deflection of a fixed beam carrying a central point load lies at
fixed ends
centre of beam
l/3 from fixed ends
none of these
✅ The correct answer is option B.
A close cycle gas turbine gives __________ efficiency as compared to an open cycle gas turbine.
same
lower
higher
✅ The correct answer is option C.
The primary unbalanced force of reciprocating masses is inversely proportional to the crank radius.
Yes
No
✅ The correct answer is option B.
A moderator
absorbs neutrons
does not absorb neutrons
accelerates neutrons
none of these
✅ The correct answer is option B.
A vessel of 4 m3 contains an oil which weighs 30 kN. The specific weight of the oil is
4.5 kN/m3
6 kN/m3
7.5 kN/m3
10 kN/m3
✅ The correct answer is option C.