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UP Polytechnic Lecturer: Mechanical Quiz 25
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Question 1
Which ratio defines the height of a porter governor to that of the watt governor for equal arm and link lengths, where m is the mass of the ball and M is the mass of the sleeve?
Question 2
Drawing stress(in MPa) for a wire drawing operation having initial and final diameter as 20 mm and 10 mm respectively is _______(flow stress taken as 500 MPa)
Question 3
The stress-strain behavior of a material is shown in the figure below. Its modulus of resilience (in MJ/m3 ) is _________.
Question 4
In a multiple disc clutch there are 8 discs on the driving shaft, and 7 discs on the driven shaft. Calculate the no. of pairs of contact surfaces____.
Question 5
Which of the following equation represents forced vibration with damping?
Question 6
Slope at the ends of a fixed support beam for a point load at centre
Question 7
Fluidity is greatly influenced by _____.
Question 8
The midpoint of a rigid link of a mechanism moves as a translation along a straight line, from rest, with a constant acceleration of 5 m/s2. The distance covered by the said midpoint in 5 s of motion is
Question 9
The heat removal rate from a refrigerated space is 7.2 kW and the power input to the compressor is 1.8 kW. The coefficient of performance (COP) of the refrigerator is
Question 10
When the bending moment is constant over the portion of the beam then:
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