increases the internal energy of the gas and increases the temperature of the gas
does some external work during expansion
Both (A) and (B)
None of these
✅ The correct answer is option A.
Mechanical Engineering MCQs
Cores are used to
form internal cavities in the casting
improve mould surface
form a part of a green sand mould
all of these
✅ The correct answer is option D.
The power transmitted through the pipe is maximum when the head lost due to friction is equal to
one-fourth of the total supply head
one-third of the total supply head
one-half of the total supply head
two-third of the total
✅ The correct answer is option B.
In a reversed Brayton cycle, the heat is absorbed by the air during
isentropic compression process
constant pressure cooling process
isentropic expansion process
constant pressure expa
✅ The correct answer is option D.
In full depth involute system, the smallest number of teeth in a pinion which meshes with rack without interference is
12
16
25
32
✅ The correct answer is option D.
High speed steel cutting tools operate at cutting speeds __________ than carbon steel tools.
2 to 3 times lower
2 to 3 times higher
5 to 8 times higher
8 to 20 times higher
✅ The correct answer is option B.
The size of cam depends upon
base circle
pitch circle
prime circle
pitch curve
✅ The correct answer is option A.
Failure of a material is called fatigue when it fails
at the elastic limit
below the elastic limit
at the yield point
below the yield point
✅ The correct answer is option D.
The kinematic viscosity of an oil (in stokes) whose specific gravity is 0.95 and viscosity 0.011 poise, is
0.0116 stoke
0.116 stoke
0.0611 stoke
0.611 stoke
✅ The correct answer is option A.
When the dimension is expressed as , then the basic size is
20 mm
20.035 mm
20.025 mm
19.975 mm
✅ The correct answer is option A.