1611. In velocity compounding of an impulse turbine, the expansion of steam takes place in a nozzle or a set of nozzles from the boiler pressure to condenser pressure.
TRUE
FALSE
✅ 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.
1612. The coefficient of performance of a domestic refrigerator is __________ as compared to a domestic air-conditioner.
same
less
more
✅ The correct answer is option B.
1613. The correct sequence for preparing a billet for extrusion process is pickling, alkaline cleaning, phosphate coating and lubricating with reactive soap.
Yes
No
✅ The correct answer is option A.
1615. The parallel fillet welded joints are designed for compressive strength.
Agree
Disagree
✅ The correct answer is option B.
1616. In a compound steam engine, the temperature range per cylinder is reduced, with corresponding reduction in the condensation.
Correct
Incorrect
✅ The correct answer is option A.
1617. The acceleration of a flat-faced follower when it has contact with the flank of a circular arc cam, is given by
ω2R cos θ
ω2(R – r1)cos θ
ω2(R – r1)sin θ
ω2r1 sin θ
✅ The correct answer is option B.
1618. Two closely-coiled helical springs ‘A’ and ‘B’ are equal in all respects but the number of turns of spring ‘A’ is double that of spring ‘B’. The stiffness of spring ‘A’ will be __________ that of spring ‘B’.
one-sixteenth
one-eighth
one-fourth
one-half
✅ The correct answer is option D.
1619. The volume per unit mass of a liquid is called specific volume.
Yes
No
✅ The correct answer is option A.
1620. The main cause for the irreversibility is
mechanical and fluid friction
unrestricted expansion
heat transfer with a finite temperature difference
all of the above
✅ The correct answer is option D.