2981. The heat treatment process used for castings is
carburising
normalising
annealing
tempering
✅ The correct answer is option B.
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.
2982. In the below figure, the stress corresponding to point D is
yield point stress
breaking stress
ultimate stress
elastic limit
✅ The correct answer is option C.
2983. In conventional milling, the cutting force tends to lift the work.
TRUE
FALSE
✅ The correct answer is option A.
2984. The discharge through a wholly drowned orifice is given by (where H1 = Height of water (on the upstream side) above the top of the orifice, H2 = Height of water (on the downstream side) above the bottom of the orifice, and H = Difference between two water levels on either side of the orifice)
Q = Cd x bH1 2gh
Q = Cd x bH2 2gh
Q = Cd x b ( H2 – H1 ) 2gh
Q = Cd x bH 2gh
✅ The correct answer is option C.
2985. The injection of fuel by external source is not required in case of engines working on Otto cycle.
Yes
No
✅ The correct answer is option A.
2986. The engine oil level should be checked
immediately after the ignition switch is turned off
while the engine is running
a few minutes after the ignition switch is turned off
while the engine is ru
✅ The correct answer is option C.
2987. The mechanical draught produces more draught than natural draught.
TRUE
FALSE
✅ The correct answer is option A.
2988. The bending stress in abeam is __________ bending moment.
equal to
less than
more than
directly proportional
✅ The correct answer is option D.
2989. Glazing in grinding wheels __________ cutting capacity.
has no effect on
increase
decrease
✅ The correct answer is option C.
2990. The lower cylindrical portion of the piston which improves piston cooling performance is called
piston crown
connecting rod
piston pin boss
piston skirt
✅ The correct answer is option D.