conduction
free convection
forced convection
radiation
✅ The correct answer is option B.
Engineering MCQs
Which of the following statement is correct for ammonia as a refrigerant?
It is toxic to mucous membranes.
it requires large displacement per TR compared to fluoro carbons.
It reacts with copper and its alloys.
all of these
✅ The correct answer is option D.
The cutting speed is minimum while machining __________ with a high speed steel tool.
cast iron
mild steel
brass
aluminium
✅ The correct answer is option A.
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.
A receiver in compressor installations is used to damp pressure waves in compressor discharge.
Yes
No
✅ The correct answer is option A.
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.
Tool life is generally better when
grain size of the metal is large
grain size of the metal is small
hard constituents are present in the microstructure of the tool material
none of the above
✅ The correct answer is option A.
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.
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.
If three coplaner forces acting on a point are in equilibrium, then each force is proportional to the sine, of the angle between the other two.
Correct
Incorrect
✅ The correct answer is option A.