ωR cos θ
ω(R – r1)cos θ
ω(R – r1)sin θ
ωr1 sin θ
✅ The correct answer is option C.
Engineering MCQs
When the primary direct crank of a reciprocating engine makes an angle of θ with the line of stroke, then the secondary direct crank will make an angle of __________ with the line of stroke.
θ/2
θ
2 θ
4 θ
✅ The correct answer is option C.
A shaft is subjected to a maximum bending stress of 80 N/mm2 and maximum shearing stress equal to 30 N/mm2 at a particular section. If the yield point in tension of the material is 280 N/mm2 and the maximum shear stress theory of failure is used, then the factor of safety obtained will be
2.5
2.8
3
3.5
✅ The correct answer is option B.
A dense structure of a grinding wheel is denoted by the number 9 to 15 or higher.
Yes
No
✅ The correct answer is option B.
The expansion valve in a refrigerator controls the flow of refrigerant.
Correct
Incorrect
✅ The correct answer is option A.
One Joule (J) is equal to
1 N-m
1 kN-m
10 N-m/s
10 kN-m/s
✅ The correct answer is option A.
A pressure vessel is said to be a thick shell, when
it is made of thick sheets
the internal pressure is very high
the ratio of wall thickness of the vessel to its diameter is less than 1/10.
the ratio of wall thic
✅ The correct answer is option D.
The pressure compounded impulse turbine as compared to velocity compounded turbine require __________ number of stages.
same
less
more
✅ The correct answer is option C.
Which of the following is the correct statement?
For a given compression ratio, both Otto and Diesel cycles have the same efficiency.
For a given compression ratio, Otto cycle is more efficient than Diesel cycle.
For a given compression ratio, Diesel cycle is more efficient than Otto cycle.
The efficiency of Otto
✅ The correct answer is option B.