Q1:

Determine torque transmitted on the pinion shaft if torque transmitted on gear shaft is 20 N-m. Consider gear ratio = 4.

Q2:

The torque transmitted by belt is maximum when the maximum tension in the belt compared to centrifugal tension is ----

Q3:

The horse power transmitted  by a belt is dependent upon

A) Tension on tight side of belt

B) Tension on slack side of belt

C) Radius of pulley

D) Speed of pulley

Q4:

The velocity ratio of two pulleys connected by an open belt or crossed belt is

Q5:

The power transmitted by a belt is maximum when the maximum tension in the belt (T) is equal to

Q6:

The velocity of the belt for maximum power is

Q7:

Rankin`s theory of failure is applicable for which of the following type of materials?

Q8:

A small element at the critical section of a component is in a bi-axial state of stress with the two principal stresses being 360MPa and 140MPa. The maximum  working stress according to Distortion Energy Theory is:

Q9:

From the hypothesis given by Rankin, the criteria for failure of brittle material are.

Q10:

A circular bar is subjected to an axial force and shear force, the difference between two principle stresses is 120MPA. Based on maximum shear stress theory what is the factor of safety, if elastic limit of the bar is 300MPa?

Q11:

A rod having cross-sectional area 100x10^-6m² is subjected to a tensile load. Based on the Teresa failure Criterion if the uniaxial yield stress of the material is 200MPa the failure load is:

Q12:

A shaft is subjected to a maximum bending stress of 80 $N/m{m}^2$and maximum shearing stress equal to 30 $N/m{m}^2$at a particular section. If the yield point in tension of the material is 280 $N/m{m}^2$, and the maximum shear stress theory of failure is used, then the factor of safety obtained will be.

Q13:

For ${\sigma }_1\ne {\sigma }_2$and ${\sigma }_3=0,$ what is the physical boundary for Rankin failure theory? 

Q14:

Consider the following statements:

1. Experiments have shown that the distortion- energy theory gives an accurate predication about failure of a ductile component that any other theory of failure

2. According to the distortion- Energy theory, the yield strength in shear is less than the yield strength in tension.

Which of the statements given above is/are correct?

Q15:

The failure occurs at a point in a member, when the maxmium shear stress in a biaxial stress system reaches the shear stress at elastic limit in simple tension test, this is according to.

Q16:

A machine element is subjected to the following stress: ${\sigma }_x=80MPa,{\sigma }_y=20MPa,Z_x=40MPa.$If shear stress of the material is 150MPa, then the factor of safety as per Tresca`s maximum shear stress theory is,,,,,

Q17:

A circular solid shaft is subjected to a bending moment of 400KNm and a twisting moment of 300KNm. On the basis of maximum Principal stress theory, the direct stress is $\sigma$and according to the maximum shear stress theory,

Q18:

Who Postulated the maximum distortion energy theory?

Q19:

A mild steel shaft of 50mm diameter is subjected to a bending moment of 1.5 KN, and Torque T. If the yield point of steel in tension is 210MPa. Find the maximum value of the torque without causing yielding of the shaft material according to Maximum Principal stress theory.

Q20:

Shear stress energy theory is also known as

Q21:

Calculate fatigue stress concentration  factor, when theoretical stress concentration factor is 1.62 and sensitivity to equal to 0.9

Q22:

In which of the following case stress concentration factor is ignored?

Q23:

If$\frac{x}{y}=4$, then stress concentration due to hold given in the figure will be.

Q24:

A thin spherical pressure vessel of 200 mm diameter and 1 mm thickness is subjected to an internal Pressure varying from 4 to 8 MPa. Assume that the yield, ultimate and endurance strength of material are 600, 800 and 400 MPa respectively. The factor of safety as Per Goodman’s relation is.

Q25:

For the given fluctuating fatigue load, the values of stress amplitude and stress ratio are respectively.

Q26:

A rotating steel shaft is supported at the ends. It is subjected to a point load at the centre. The Maximum bending stress developed is 100 MPa. If the yield, ultimate & corrected endurance strength of the shaft material is 300 MPa, 500 MPa & 200 MPa respectively, then the factor safety for the shaft is ………..

Q27:

A thin cylinder of inner radius 500 mm and thickness 10 mm is subjected to an intenal Pressure of 5 MPa. The average circumferential (Hoop) stress in MPa is

Q28:

In a structure subjected to fatigue loading, the minimum and maximum stresses developed in a cycle are 200 MPa and 400 MPa respectively. The value of stress amplitude in (MPa) is

Q29:

Use of multiple notches in a V shaped flat plate will

Q30:

In terms of theoretical stress Concentration factor (K_t) and fatigue stress concentration factor (K_f), the notch sensitivity ‘q’ is expressed as.