4261. In normalising process, the hypo-eutectiod steel is heated from 30° C to 50° C above the upper critical temperature and then cooled in still air.
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.
4262. A three way catalytic converter
recirculates exhaust gasses
burns fuel vapaour gasses
reduces N2, H2O, and CO2 emission levels
removes CO, HC, and NO
✅ The correct answer is option D.
4263. In the austempering process of heat treatment, austenite changes into
martensite
troostite
sorbite
bainite
✅ The correct answer is option D.
4264. A bottoming tap has
its end tapered for about three or four threads
its end tapered for about eight or ten threads
full threads for the whole of its length
none of the above
✅ The correct answer is option C.
4265. The oxidising flame is similar to neutral flame but the inner cone is less luminous and shorter.
Yes
No
✅ The correct answer is option A.
4266. The time taken by a particle for one complete oscillation is known as periodic time.
Agree
Disagree
✅ The correct answer is option A.
4267. The load required to produce a unit deflection in a spring is called
flexural rigidity
torsional rigidity
spring stiffness
Young’s modulus
✅ The correct answer is option C.
4268. When the metal is removed by erosion caused by rapidly recurring spark discharges between the tool and work, the process is known as
electro-chemical machining
electro-discharge machining
ultra-sonic machining
none of these
✅ The correct answer is option B.
4269. The wet bulb temperature at 100% relative humidity is __________ dry bulb temperature.
same as
lower than
higher than
✅ The correct answer is option A.
4270. The order in which effort applied to the steering wheel is transferred to the front wheel is
steering wheel – steering gearbox – steering shaft – tie rod – steering knuckle – front wheels
steering wheel – steering shaft – steering gearbox – tie rod – steering kunckle -front wheels
steering wheel – steering shaft – steering gearbox – steering knuckle – tie rod – front wheels
steering wheel – tie r
✅ The correct answer is option B.