381. The heating of air, without any change in its specific humidity, is known as sensible heating.
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.
383. Valve overlap is the number of degrees of camshaft rotation during which
both valves are closed
both valves are open
both ‘a’ and ‘b’
none of these
✅ The correct answer is option B.
384. The maximum shear stress developed in a beam of circular section is __________ the average shear stress.
equal to
4/3 times
1.5 times
twice
✅ The correct answer is option B.
385. A flow is called hyper-sonic, if the Mach number is
less than unity
unity
between 1 and 6
none of these
✅ The correct answer is option D.
386. The area under the temperature-entropy curve (T – s curve) of any thermodynamic process represents
heat absorbed
heat rejected
either (a) or (b)
none of these
✅ The correct answer is option C.
387. Crater wear leads to
increase in cutting temperature
weakening of tool
friction and cutting forces
all of these
✅ The correct answer is option D.
388. The width of the bucket for a Pelton wheel is generally __________ the diameter of jet.
double
three times
four times
five times
✅ The correct answer is option D.
389. A mortise gauge is a
striking tool
planing tool
boring tool
marking tool
✅ The correct answer is option D.
390. The greater the pressure difference in throttling, the lesser is the irreversibility.
Yes
No
✅ The correct answer is option B.