29°
47.5°
55°
60°
✅ The correct answer is option C.
Mechanical Engineering MCQs
Cementite consist of
13% carbon and 87% ferrite
13% cementite and 87% ferrite
13% ferrite and 87% cementite
6.67% carbon and 93.33
✅ The correct answer is option D.
Re-entrant or Borda’s mouthpiece is an __________ mouthpiece.
internal
external
✅ The correct answer is option A.
When the Mach number is between __________ the flow is called super-sonic flow.
1 and 2.5
2.5 and 4
4 and 6
1 and 6
✅ The correct answer is option D.
According to lami’s theorem
the three forces must be equal
the three forces must be at 120° to each other
the three forces must be in equilibrium
if the three forces ac
✅ The correct answer is option D.
The velocity ratio of a first system of pulleys with 4 pulleys is
4
8
16
20
✅ The correct answer is option C.
Which one of the following material will require the largest size of riser for the same size of casting?
Aluminium
Cast iron
Steel
Copper
✅ The correct answer is option C.
In spot welding, the distance between the nearest edge of the plate and centre of weld should be equal to
d
1.5 d
3 d
6 d
✅ The correct answer is option B.
The function of an eccentric is to provide __________ motion to the slide valve.
reciprocating
rotary
✅ The correct answer is option A.