first
second
third
✅ The correct answer is option C.
Mechanical Engineering MCQs
Combustuion of fuel takes place __________ the engine cylinder of a steam engine.
outside
inside
✅ The correct answer is option A.
One effect of detonation is
delay in ignition
loss of power
overheating of engine
overcooling of engine
✅ The correct answer is option B.
The acid used in automobile battery is
hydrochloric acid
hydrofluoric acid
nitric acid
sulphuric acid
✅ The correct answer is option D.
A cube at high temperature is immersed in a constant temperature bath. It loses heat from its top, bottom and side surfaces with heat transfer coefficients of h1, h2 and h3 respectively. The average heat transfer coefficient for the cube is
h1 + h2 + h3
(h1h2h3)1/3
none of these
✅ The correct answer is option D.
The usual value of the helix angle of a drill is
20°
30°
45°
60°
✅ The correct answer is option B.
The directional solidification in casting can be improved by using
chills and chaplets
chills and padding
chaplets and padding
chills, chaplets and p
✅ The correct answer is option B.
If a tyre is designated as 175/65 R14 82 S, then the aspect ratio for the tyre is
175
65
14
82
✅ The correct answer is option B.
In order to reduce the rotor speed of an impulse turbine, the method employed is
velocity compounding
pressure compounding
pressure-velocity compounding
all of these
✅ The correct answer is option D.
The process of heat transfer from one particle of the body to another by the actual motion of the heated particles, is called
conduction
convection
radiation
✅ The correct answer is option B.