Deck 2: Engineering Design and Analysis

Question 1

1816mm and radius of centroidal axis is 100mm, then find the bending stress at inner fibre whose radius is 50mm. Area of cross section of beam is 7200mm² and the beam is loaded with 100kN of load.

A)97.3
B)95.8
C)100.6
D)none of the mentioned

Answer 1

100.6

Question 2

A curved beam with eccentricity 0.02D is loaded with 1kN.Centroidal radius=4D and inner and outer radii are 3.5D and 4.5D respectively. Area of cross section is 0.8D². Find the dimension D if allowable stress is 110N/mm² and considering only direct tensile stress.

A)4.7mm
B)6.8mm
C)13.95mm
D)3.4mm

Answer 2

3.4mm

Question 3

All type of stresses vanishes after as soon as the applied load is removed.

Answer 3

False

Question 4

Residual stresses are always added in the load stresses and hence are always harmful.

Question 5

Which of the following is the numerator of factor safety formula?

A)working stress
B)shear stress
C)tensile stress
D)ultimate stress

Question 6

Which of the following can be the factor of safety for shock loading?

A)11
B)13
C)4
D)7

Question 7

Factor of safety is used to find out the reliability of the design.

Question 8

What can understand by the factor of safety equal to one?

A)it means that the structure will fail under load
B)it means that the structure will only support the actual load
C)it means that the structure will support more than the actual load
D)there is no relation between factor safety and load application

Question 9

What is a safe factor of failure for a component which on failure can result in financial loss or serious injury?

A)1
B)2
C)3
D)4

Question 10

Design factor for most aircraft structures is 2.

Question 11

Does ASME Standard take into consideration shock and fatigue factors?

Question 12

Calculate the tension in the rope of pulley C.

A)6778.3n and 7765.3n
B)5948.15n and 2288.75n
C)5468.4n ad 8678.3n
D)none of the listed

Question 13

If bending moment on point B in horizontal plate is M and in vertical plane is m, then the net bending moment at point B is?

A)m
B)m.
C)m+m
D)?m²+m²

Question 14

If yielding strength=400N/mm², the find the permissible shear stress according to ASME standards.

A)72 n/mm²
B)76 n/mm²
C)268 n/mm²
D)422 n/mm²

Question 15

The strength of hollow shaft is more than the strength of solid shaft of same weight.

Question 16

Solid shafts are used in epicyclic gearboxes.

Question 17

Refer to fig 1. Two plates are fastened by means of two bolts. The yield strength of bolt is 400N/mm² and factor of safety is 4. Determine the size of the bolts.

A)8mm
B)9mm
C)10mm
D)11mm

Question 18

8'CW from the vertical. Hence net shear force = ? [5000cos36.8+1250]²+ [5000sin36.8]².

A)10.74mm
B)9.23mm
C)11.54mm
D)8.68mm

Question 19

Which bolt is under maximum shear stress?

A)1
B)2
C)3
D)all are under equivalent shear stress

Question 20

Arrange the bolts in order of decreasing shear stresses.

A)1>2>3
B)2>1>3
C)3>1>2
D)3>2>1

Question 21

Determine the size of the bolts if yield strength of bolt is 400N/mm² and factor of safety is 4. The bolts are equidistant having separated by 60mm and the margin to the left and right is 25mm. Also P=5kN acts at a distance of 200mm from the channel.

A)14.34mm
B)13.44mm
C)15.44mm
D)12.66mm

Question 22

A knuckle joint is unsuitable for two rotating shafts, which transmit torque

Question 23

A maximum of how many roads may be connected using a knuckle joint?

A)2
B)3
C)4
D)5