241. In designing a connecting rod, it is considered like __________ for buckling about X-axis.
both ends hinged
both ends fixed
one end fixed and the other end hinged
one end fixed and the
✅ The correct answer is option A.
Machine Design MCQs
242. When the shaft rotates in anticlockwise direction at slow speed in a bearing, it will
have contact at the bottom most of the bearing
move towards right of the bearing making the metal to metal contact
move towards right of the bearing making no metal to metal contact
move towards left of t
✅ The correct answer is option D.
243. The maximum shear stress theory is used for
brittle materials
ductile materials
plastic materials
non-ferrous materials
✅ The correct answer is option B.
244. A tapered key which fits in a key way in the hub and is flat on the shaft, is known as
feather key
gib-head key
wood ruff key
flat saddle key
✅ The correct answer is option D.
245. While designing a screw in a screw jack against buckling failure, the end conditions for the screw are taken as
both the ends fixed
both the ends hinged
one end fixed and the other end hinged
one end fixed and the
✅ The correct answer is option D.
246. A tangent key is provided in pairs at right angles and each key is to withstand torsion in one direction only.
Agree
Disagree
✅ The correct answer is option A.
247. A sliding bearing which can support steady loads without any relative motion between the journal and the bearing, is called
zero film bearing
boundary lubricated bearing
hydrodynamic lubricated bearing
hydrostatic lubricated
✅ The correct answer is option D.
248. Rankine Gordon formula for buckling is valid for
long column
short column
short and long column
very long column
✅ The correct answer is option C.
249. 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.
250. The square threads are usually found on
spindles of bench vices
railway carriage couplings
feed mechanism of machine tools
screw cutting lathes
✅ The correct answer is option C.