2171. The rolling resistance is because of the friction between the
wheel rim and tyre
tyre and the road surface
wheel rim and road surface
none of these
✅ 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.
2172. When a point at the end of a link moves with constant angular velocity, its acceleration will have
radial component only
tangential component only
coriolis component only
radial and tangential
✅ The correct answer is option A.
2173. The acetylene cylinder is usually painted with
black colour
white colour
maroon colour
yellow colour
✅ The correct answer is option C.
2174. The efficiency of Otto cycle depends upon the specific heats of the working substance.
Yes
No
✅ The correct answer is option B.
2175. First law of thermodynamics deals with
conservation of heat
conservation of momentum
conservation of mass
conservation of energy
✅ The correct answer is option D.
2176. An exact straight line motion mechanism is a
Scott-Russell’s mechanism
Hart’s mechanism
Peaucellier’s mechanism
all of these
✅ The correct answer is option D.
2177. In a turnbuckle, if one of the rods has left hand threads, then the other rod will have
right hand threads
left hand threads
multiple threads
pointed threads
✅ The correct answer is option A.
2178. In a gear, having involute teeth, the normal to the involute is a tangent to the
pitch circle
base circle
addendum circle
dedendum circle
✅ The correct answer is option B.
2179. The fire tubes in a Locomotive boiler has __________ diameter.
4.75 mm
5.47 mm
7.45 mm
47.5 mm
✅ The correct answer is option D.