A single riveted lap joint of two similar plates as shown in the figure below has the following geometrical and material details: **A. ** 83

**B. ** 125

**C. ** 167

**D. ** 501

**Answer : ****Option C**

**Explaination / Solution: **

No Explaination.

Width of the plate w=200 mm, thickness of the plate t=5 mm, number of rivets n=3, diameter of the rivet dr = 10mm, diameter of the rivet hole dh = 11mm, allowable tensile stress of the plate σp = 200 MPa, allowable shear stress of the rivet σs = 100 MPa and allowable bearing stress of the σc = 150 MPa

If the plates are to be designed to avoid tearing failure, the maximum
permissible load P in kN is

No Explaination.

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A single–point cutting tool with 12^{o} rake angle is used to machine a steel work–
piece. The depth of cut, i.e. uncut thickness is 0.81mm. The chip thickness under
orthogonal machining condition is 1.8mm. The shear angle is approximately

**A. ** 22o

**B. ** 26o

**C. ** 56o

**D. ** 76o

**Answer : ****Option B**

**Explaination / Solution: **

Relation between shear angle (φ), chip thickness ratio (r) and rake angle (α) is given by

Relation between shear angle (φ), chip thickness ratio (r) and rake angle (α) is given by

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A solid shaft of diameter, d and length L is fixed at both the ends. A torque, T_{0} is applied at a
distance, L/4 from the left end as shown in the figure given below.

**A. ** 16T0/πd^{3}
**B. ** 12T0/πd3

**C. ** 8T0/πd3

**D. ** 4T0/πd3

**Answer : ****Option B**

**Explaination / Solution: **

No Explaination.

The maximum shear stress in the shaft is

No Explaination.

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The principal stresses at a point in a critical section of a machine component are σ_{1 }= 60MPa, σ_{2 }= 5MPa and σ_{3 }= -40 MPa. For the material of the component, the tensile
yield strength is σ_{y }= 200 MPa.
According to the maximum shear stress theory, the factor of
safety is

**A. ** 1.67

**B. ** 2.00

**C. ** 3.60

**D. ** 4.00

**Answer : ****Option B**

**Explaination / Solution: **

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The cross sections of two hollow bars made of the same material are
concentric circles as shown in the figure. It is given that r_{3}> r1 and
r4> r2, and that the areas of the cross-sections are the same. J1 and J2 are the torsional rigidities of the bars on the left and right,
respectively. The ratio J2/J1 is

**A. ** >1

**B. ** <0.5

**C. ** =1

**D. ** Between 0.5 and 1

**Answer : ****Option A**

**Explaination / Solution: **

Torsional rigidity for any Shaft is given by,

Torsional rigidity for any Shaft is given by,

J = GIP

Or J α IP (Polar moment of Inertia)
And for a hollow shaft,

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A band brake having band-width of 80mm, drum diameter of 250mm, coefficient
of friction of 0.25 and angle of wrap of 270 degrees is required to exert a friction
torque of 1000N-m. The maximum tension (in kN) developed in the band is

**A. ** 1.88

**B. ** 3.56

**C. ** 6.12

**D. ** 11.56

**Answer : ****Option D**

**Explaination / Solution: **

No Explaination.

No Explaination.

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Which one of the following types of stress-strain relationship best describes the behavior of
brittle materials, such as ceramics and thermosetting plastics, (σ = stress and ε = strain)?

**A. **

**B. **

**C. **

**D. **

**Answer : ****Option D**

**Explaination / Solution: **

No Explaination.

No Explaination.

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In a simply-supported beam loaded as shown below, the maximum bending
moment in Nm is

**A. ** 25

**B. ** 30

**C. ** 35

**D. ** 60

**Answer : ****Option B**

**Explaination / Solution: **

No Explaination.

No Explaination.

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A model of a hydraulic turbine is tested at a head of 1/4^{th} of that under which the
full scale turbine works. The diameter of the model is half of that of the full scale
turbine. If
N is the RPM of the full scale turbine, the RPM of the model will be

**A. ** N/4

**B. ** N/2

**C. ** N

**D. ** 2N

**Answer : ****Option C**

**Explaination / Solution: **

No Explaination.

No Explaination.

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A thin spherical pressure vessel of 200 mm diameter and 1 mm thickness is
subjected to an internal pressure varying form 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

**A. ** 2.0

**B. ** 1.6

**C. ** 1.4

**D. ** 1.2

**Answer : ****Option B**

**Explaination / Solution: **

No Explaination.

No Explaination.

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**Preparation Study Material**- Materials Science (Study/Preparation)
- Engineering Mechanics (Study/Preparation)
- Strength of Materials (Study/Preparation)
- Engineering Thermodynamics (Study/Preparation)
- Fluid Mechanics and Machinery (Study/Preparation)
- Manufacturing Technology I (Study/Preparation)
- Electrical Drives and Controls (Study/Preparation)
- Kinematics of Machinery (Study/Preparation)
- Manufacturing Technology II (Study/Preparation)
- Power-Plant Engineering (Study/Preparation)
- Engineering Materials and Metallurgy (Study/Preparation)
- Thermal Engineering (Study/Preparation)