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Design Questions Set 5:

Quiz Mode

A spur gear with pitch circle diameter D has a number of teeth T. The module m is defined as which of the following?

m = π D / T

m = D.T

m = T / D

m = D / T

Solution:

In a circumferential lap joint (for boiler shell), the pitch and diameter of rivets are 70 mm and 25 mm respectively. Calculate the efficiency of the joint.

64.2%

72.2%

58.4%

66.6%

Solution:

The rotational speed at which the additional deflection of the shaft from the axis of rotation becomes infinite, is known as

Rotational speed

Stabilizing speed

Whirling speed

Reciprocating speed

Solution:

The diameter of the rivet is 8 mm and the force is 10 kN. The thickness of the plate is 2 mm. Calculate the width of the plate if the permissible tensile stress is 50 N/mm².

116 mm

112 mm

125 mm

118 mm

Solution:

If a solid shaft of 40 mm diameter is subjected to both bending moment and torque of 300 kN-mm and 150 kN-mm respectively, then calculate the maximum shear stress induced in it.

31.07 N/mm^2

22.73 N/mm^2

24.60 N/mm^2

26.69 N/mm^2

Solution:

An element at the critical section of the component under the stress conditions has two principal stresses: σx = 70 MPa and σy = 70 MPa, with τxy = 0, and the yield strength (S_yt) is 100 MPa. Calculate the factor of safety using the distortion energy theory.

1.5

1.43

1.7

Solution:

Consider a band brake with the following data:

The ratio of tension on the tight side to slack side = 3

The angle of overlap of the band on the drum = 180 degrees

Find the required coefficient of friction between the band and the drum. (take ln(3) = 1.1)

0.30

0.35

0.40

0.45

Solution:

A bearing needs to be identified. It is known that the coding (according to the naming convention) starts with 1 or 6. Which of the following is the correct type of bearing with the given information?

Spherical Roller Bearing

Angular contact bearing

Ball Bearing

Cylindrical roller bearing

Solution:

A mild steel rod of 12 mm diameter was tested for tensile strength with a gauge length of 60 mm. The following observations were recorded:

Final length = 80 mm; Final diameter = 7 mm; Yield load = 3.4 kN and Ultimate load = 6.1 kN.

Calculate the percentage reduction in area.

0.66%

66%

68%

56%

Solution:

What is the condition for whirling of a rotating shaft?

Centripetal force equal to elastic restoring force in rotating shaft

Bending force equal to gravitational force in non-rotating shaft

Whirling happens for non-rotating shaft only

Bending force equal to elastic restoring force for non-rotating shaft

Design Questions Set 5:

A spur gear with pitch circle diameter D has a number of teeth T. The module m is defined as which of the following?

Solution:

In a circumferential lap joint (for boiler shell), the pitch and diameter of rivets are 70 mm and 25 mm respectively. Calculate the efficiency of the joint.

Solution:

The rotational speed at which the additional deflection of the shaft from the axis of rotation becomes infinite, is known as

Solution:

The diameter of the rivet is 8 mm and the force is 10 kN. The thickness of the plate is 2 mm. Calculate the width of the plate if the permissible tensile stress is 50 N/mm².

Solution:

If a solid shaft of 40 mm diameter is subjected to both bending moment and torque of 300 kN-mm and 150 kN-mm respectively, then calculate the maximum shear stress induced in it.

Solution:

An element at the critical section of the component under the stress conditions has two principal stresses: σx = 70 MPa and σy = 70 MPa, with τxy = 0, and the yield strength (S_yt) is 100 MPa. Calculate the factor of safety using the distortion energy theory.

Solution:

Consider a band brake with the following data:

The ratio of tension on the tight side to slack side = 3

The angle of overlap of the band on the drum = 180 degrees

Find the required coefficient of friction between the band and the drum. (take ln(3) = 1.1)

Solution:

A bearing needs to be identified. It is known that the coding (according to the naming convention) starts with 1 or 6. Which of the following is the correct type of bearing with the given information?

Solution:

A mild steel rod of 12 mm diameter was tested for tensile strength with a gauge length of 60 mm. The following observations were recorded:

Final length = 80 mm; Final diameter = 7 mm; Yield load = 3.4 kN and Ultimate load = 6.1 kN.

Calculate the percentage reduction in area.

Solution:

What is the condition for whirling of a rotating shaft?

Solution:

Related Question Sets:

Related Topics:

Design Questions Set 5:

A spur gear with pitch circle diameter D has a number of teeth T. The module m is defined as which of the following?

Solution:

In a circumferential lap joint (for boiler shell), the pitch and diameter of rivets are 70 mm and 25 mm respectively. Calculate the efficiency of the joint.

Solution:

The rotational speed at which the additional deflection of the shaft from the axis of rotation becomes infinite, is known as

Solution:

The diameter of the rivet is 8 mm and the force is 10 kN. The thickness of the plate is 2 mm. Calculate the width of the plate if the permissible tensile stress is 50 N/mm².

Solution:

If a solid shaft of 40 mm diameter is subjected to both bending moment and torque of 300 kN-mm and 150 kN-mm respectively, then calculate the maximum shear stress induced in it.

Solution:

An element at the critical section of the component under the stress conditions has two principal stresses: σx = 70 MPa and σy = 70 MPa, with τxy = 0, and the yield strength (Syt) is 100 MPa. Calculate the factor of safety using the distortion energy theory.

Solution:

Consider a band brake with the following data: The ratio of tension on the tight side to slack side = 3 The angle of overlap of the band on the drum = 180 degrees Find the required coefficient of friction between the band and the drum. (take ln(3) = 1.1)

Solution:

A bearing needs to be identified. It is known that the coding (according to the naming convention) starts with 1 or 6. Which of the following is the correct type of bearing with the given information?

Solution:

A mild steel rod of 12 mm diameter was tested for tensile strength with a gauge length of 60 mm. The following observations were recorded: Final length = 80 mm; Final diameter = 7 mm; Yield load = 3.4 kN and Ultimate load = 6.1 kN. Calculate the percentage reduction in area.

Solution:

What is the condition for whirling of a rotating shaft?

Solution:

Related Question Sets:

Related Topics:

An element at the critical section of the component under the stress conditions has two principal stresses: σx = 70 MPa and σy = 70 MPa, with τxy = 0, and the yield strength (S_yt) is 100 MPa. Calculate the factor of safety using the distortion energy theory.

Consider a band brake with the following data:

The ratio of tension on the tight side to slack side = 3

The angle of overlap of the band on the drum = 180 degrees

Find the required coefficient of friction between the band and the drum. (take ln(3) = 1.1)

A mild steel rod of 12 mm diameter was tested for tensile strength with a gauge length of 60 mm. The following observations were recorded:

Final length = 80 mm; Final diameter = 7 mm; Yield load = 3.4 kN and Ultimate load = 6.1 kN.

Calculate the percentage reduction in area.