Correct
Incorrect
✅ The correct answer is option A.
Mechanical Engineering MCQs
In welding copper alloys with TIG arc welding
direct current with straight polarity is used
direct current with reversed polarity is used
alternating current is used
any one of these
✅ The correct answer is option A.
A material is said to be allotropic, if it has
fixed structure at all temperatures
atoms distributed in random pattern
different crystal structures at different temperatures
any one of the above
✅ The correct answer is option C.
Whitworth quick return motion mechanism consists of three turning pairs and one sliding pair.
Right
Wrong
✅ The correct answer is option A.
The pressure of steam in the engine cylinder at the beginning of the stroke is __________ the boiler pressure.
equal to
less than
higher than
✅ The correct answer is option B.
The steel produced by bessemer or open hearth process is __________ to that produced by L-D process.
superior
inferior
✅ The correct answer is option B.
According to equation of continuity,
w1a1 = w2a2
w1v1 = w2v2
a1v1 = a2v2
a1/v1 = a2/v2
✅ The correct answer is option C.
Two shafts A and B under pure torsion are of identical length and identical weight and are made of the same material. The shaft A is solid and the shaft B is hollow. We can say that
shaft B is better than shaft A
shaft A is better than shaft B
both the shafts are equally good
✅ The correct answer is option A.
In a centrifugal casting method, the impurities are collected in the centre of the casting.
Yes
No
✅ The correct answer is option A.
Circumferential joint in boilers is used to get the required length of a boiler.
TRUE
FALSE
✅ The correct answer is option A.