1651. Transverse fillet welds are designed for
tensile strength
compressive strength
shear strength
bending strength
✅ The correct answer is option A.
Mechanical Engineering
Prepare with the best Mechanical Engineering MCQs with answers and explanations for exams, interviews, and job tests. Our collection covers core topics such as engineering mechanics, thermodynamics, strength of materials, theory of machines, fluid mechanics, heat transfer, manufacturing processes, machine design, and power plant engineering. These Mechanical Engineering multiple-choice questions are designed for students, fresh graduates, and professionals preparing for NTS, PPSC, FPSC, PEC exams, GATE, university entry tests, and recruitment assessments. Strengthen your technical knowledge and problem-solving ability with our updated and comprehensive Mechanical Engineering MCQs.
1652. The ratio of the workdone on the blades per kg of steam to the total energy supplied per stage per kg of steam is called
blading efficiency
nozzle efficiency
stage efficiency
mechanical efficiency
✅ The correct answer is option C.
1653. A reversible engine has ideal thermal efficiency of 30%. When it is used as a refrigerating machine with all other conditions unchanged, the coefficient of performance will be
1.33
2.33
3.33
4.33
✅ The correct answer is option B.
1654. 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.
1655. 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.
1656. The C.O.P. of a Carnot refrigerator in winter will be __________ as compared to C.O.P. in summer.
same
lower
higher
✅ The correct answer is option C.
1657. A body is subjected to a tensile stress of 1200 MPa on one plane and another tensile stress of 600 MPa on a plane at right angles to the former. It is also subjected to a shear stress of 400 MPa on the same planes. The minimum normal stress will be
400 MPa
500 MPa
900 MPa
1400 MPa
✅ The correct answer is option A.
1658. The elasticity is the property of a material which enables it to
regain its original shape after deformation when the external forces are removed
draw into wires by the application of a tensile force
resist fracture due to high impact loads
retain deformation pro
✅ The correct answer is option A.
1659. Cast iron pipes are mainly used
for conveying steam
in water and sewage systems
in pressure lubrication systems on prime movers
all of the above
✅ The correct answer is option B.
1660. Which one of the following event would reduce volumetric efficiency of a vertical compression ignition engine ?
inlet valve closing after bottom dead centre
inlet valve closing before bottom dead centre
inlet valve opening before top dead centre
exhaust valve closing
✅ The correct answer is option B.