Free Printable AIRCRAFT STRUCTURE

1.

The product of the tangential force acting on the

shaft and radius of shaft known as

a)

(a) Torsional rigidity

b)

(b) Flexural rigidity

c)

(c) Bending moment

d)

(d) Twisting moment

2.

The partial derivative of strain energy with respect to torque gives angle of twist is known as

a)

a. Csatigliano second theorem

b)

b. Principal axis theorem

c)

c. Perpendicular axis theorem

d)

d.Shear stress energy theorem

3.

Magnitude of shear stress induced in a shaft due to applied torque varies from

a)

a. Maximum at center to zero at circumference.

b)

b. Maximum at center to minimum (not-zero) at circumference.

c)

c. Zero at center to maximum at circumference.

d)

Minimum (not zero) at center to maximum at circumference.

4.

The relation governing the torsional torque in circular shafts is a.

a)

a. T/r=τ/l=Gθ/J

b)

b. T/J=τ/r=Gθ/l

c)

c. T/J=τ/l=Gθ/r

d)

d. T/l=τ/r=Gθ/J

5.

Angle of twist of a circular shaft is given by

a)

a. GJ/Tl

b)

b. Tl/GJ.

c)

c. TJ/Gl.

d)

d.TG/Jl.

6.

For two shafts joined in series, the --------------- in each shaft is same.

a)

a. Shear stress.

b)

b. Angle of twist

c)

c. torque

d)

d.Torsional stress.

7.

For two shafts joined in parallel, the --------------- in each shaft is same.

a)

a. Shear stress.

b)

b. Angle of twist

c)

c. torque

d)

d.Torsional stress.

8.

A shaft is said to be in pure torsion if

a)

a. Turning moment is applied at one end and other end is free

b)

b. Turning force is applied at one end and other end is free

c)

c. Two opposite turning moments are applied to the shaft

d)

d.Combination of torsional load and bending load is applied to the shaft

9.

For a multi cell structure subjected to torque .Which one of the following condition is true?

a)

a. T = T1 + T2

b)

b. T = T1 = T2

c)

c. T = T1 – T2

d)

d. T = (T1.T2)^1/2

10.

A shaft

a)

a. Is always subjected to pure torsion

b)

b. Combination of M & T but no end thrust

c)

c. Combination of torque & end thrust but no bending moment

d)

d. May be subjected to a combination of M, T and end thrust

11.

The unit of Torque in SI units

a)

a. kg-m

b)

b. kg-cm

c)

c. N-m

d)

d. N/m²

12.

When a shaft is subjected to a twisting moment, every cross-section of the shaft will be under

a)

a. Tensile stress

b)

b. Compressive stress

c)

c. Shear stress

d)

d. All of these

13.

The product of the tangential force acting on the shaft and radius of shaft known as

a)

a. Torsional rigidity

b)

b. Flexural rigidity

c)

c. Bending moment

d)

d.Twisting moment

14.

The polar moment of inertia of a solid circular shaft of diameter (d) is

a)

a. πd² /16

b)

b. πd³/32

c)

c. πd⁴ /32

d)

d. πd⁴ /64

15.

A member subjected to couple produces rotational motion about its longitudinal axis called as ________

a)

a. torsion

b)

b. twisting moment

c)

c. both a. and b.

d)

d. bending moment

16.

Which of the following assumptions are made in torsion theory?

a)

a. Shaft is perfectly straight

b)

b. Material of the shaft is heterogeneous

c)

c. Twist cannot be uniform along the length of the shaft

d)

d. Shaft is perfectly curve

17.

In the relation ( T/J = Gθ/L = τ/ R), the letter G denotes modulus of ______

a)

a. elasticity

b)

b. plasticity

c)

c. rigidity

d)

d. resilience

18.

Which of the following act on shafts?

a)

a. Torsional moment

b)

b. Bending Moment

c)

c. Both torsional and bending

d)

d.None of the mentioned

19.

Two shafts will have equal strength, if

a)

a. diameter of both the shafts is same

b)

b. angle of twist of both the shafts is same

c)

c. material of both the shafts is same

d)

d.twisting moment of both the shafts is same

20.

Bradth –Batho theory is

a)

a. T = 2qA

b)

b. q = T 2 A

c)

c. T = q/2A

d)

d. All the above

21.

What is the effect of torsional force on aircraft wing………

a)

a. To change the aerodynamic forces

b)

b. To cause structural damage

c)

c. To change the stability

d)

d. All the above.

22.

a)

a

b)

b

c)

c

d)

d

23.

a)

a

b)

b

c)

c

d)

d

24.

Strain energy can be written as…………..

a)

a. ½*stress*strain*volume

b)

b. ½ *stress *strain*area

c)

c. ½*strain*stress*E

d)

d.½*strain*G*stress

25.

Bradth- Batho theory is applicable for

a)

a. Thin walled beams

b)

b. Idealized structure

c)

c. Open channel section

d)

All the above

26.

Energy stored in a material due to deformation is known as …………………….

a)

a. Strain energy

b)

b. Potential energy

c)

c. Pressure Energy

d)

d.Thermal energy

27.

A thin wall hollow tube of rectangular cross section of 50 mm * 20 mm and thickness 3 mm. Calculate the maximum shear stress due to torque 120 Nm.

a)

a. 20 N/mm²

b)

b. 40 N/mm²

c)

c. 10 N/mm²

d)

d.15 N/mm²

28.

Determine angle of twist per unit length of the multi cell structure subjected to modulus of rigidity 25*10³ N/cm² and thickness is 0.1 cm ,length = 10 cm , breadth = 10 cm.

a)

a. 8.84 * 10^-6 rad/cm

b)

b. 7.84 * 10^-6 rad/cm

c)

c. 6.84 * 10^-6 rad/cm

d)

d.5.84 * 10^-6 rad/cm

29.

Determine the shear flow value of the multi cell (2) rectangular structure subjected to torque of 10000 N-cm and modulus of rigidity 25*10³ N/cm² and thickness is 0.1 cm ,The dimensions of the cells arecell1 (10 cm*10 cm) ,cell 2(20 cm*10 cm).

a)

a. 15.38 N/cm ,17.30 N/cm

b)

b. 25.38 N/cm ,27.30 N/cm

c)

c. 35.38 N/cm ,17.30 N/cm

d)

d. 25.38 N/cm ,17.30 N/cm

30.

For a multi cell structure the angle of twist is

a)

a. Angle of twist in cell 1 = Angle of twist in cell 2

b)

b. Angle of twist in cell 1 > Angle of twist in cell 2

c)

c. Angle of twist in cell 1 < Angle of twist in cell 2

d)

d.Angle of twist in cell 1 not equal to Angle of twist in cell 2

31.

When a multi cell structure subjected to Torque. Which one of the following statement is correct?

a)

a. T = Sum of moment carried by the each cell

b)

b. Each cell carry the same Torque

c)

c. One cell carry the maximum torque

d)

d.All the above

32.

A thin wall hollow tube of rectangular section had a maximum shear stress of 20 N/mm²when subjected to the torque of 120 Nm and thickness 3 mm. Calculate the enclosed area?

a)

a. 1000 mm²

b)

b. 100 mm²

c)

c. 1050 mm²

d)

d.1500 mm²

33.

A thin wall hollow tube of rectangular section of 50 mm* 20 mm had a maximum shear stress of 20 N/mm²when subjected to the torque of 120 Nm and thickness 3 mm. Calculate the thickness?

a)

a. 3mm

b)

b. 4mm

c)

c. 2mm

d)

d.1 mm

34.

Shear flow equation for the closed section

a)

a. q_c = q_s,o + q_b

b)

b. q_s,0 = q_c + q_b

c)

c. q_b = q_s,o + q_c

d)

d. q_s,0 = q_c + q_b

35.

q_{s, 0 = ?}

a)

a. M/2A

b)

b. 2A/M

c)

c. A/2M

d)

d. 2M/A

36.

A solid shaft is subjected to torque of 150 N-mm. The area of the cross section of the solid shaft is (15 mm * 20 mm).Determine the shear flow due to torque applied?

a)

a. 0.5 N/mm

b)

b. 0.6 N/mm

c)

c. 0.7 N/mm

d)

d.0.8 N/mm

37.

A thin hollow tube of cross section (20 cm * 15 cm).When subjected to torque produce a shear stress 120 N/cm².The thickness of the tube is 2mm.

a)

a. 14.4 KN-cm

b)

b. 15.4 KN-cm

c)

c. 16.4 KN-cm

d)

d.17.4 KN-cm

38.

A thin hollow tube of cross sectional area 500 m².It is subjected to torque of 70 KNm. Determine the shear flow?

a)

a. 140 N/m

b)

b. 150 N/m

c)

c. 160 N/m

d)

d.180 N/m

39.

A hollow circular shaft is subjected to torque of 1500 KN-mm. The shear stress produced due to applied torque is 240 N/mm².The length of the shaft is 50 mm .Determine the depth of the shaft?

a)

a. 31.66 mm

b)

b. 41.66 mm

c)

c. 51.66 mm

d)

d.33.66 mm

40.

A thin hollow tube of cross section (15 cm * 15 cm) to produce shear stress of 145 N/mm² when subjected to torque of 15000 N-mm. Determine the thickness of the tube?

a)

a. 0.0022 mm

b)

b. 0.0032 mm

c)

c. 0.0042 mm

d)

d 0.0052 mm

41.

If a shaft is subjected to torque of 10000 N-cm to produce shear stress of 180 N/cm².The thickness of the shaft is 5cm .Determine the Shear flow?

a)

a. 900 N/cm²

b)

b. 800 N/cm²

c)

c. 600 N/cm²

d)

d.700 N/cm²

42.

a)

a

b)

b

c)

c

d)

d

43.

a)

a

b)

b

c)

c

d)

d

44.

a)

a

b)

b

c)

c

d)

d

45.

a)

a

b)

b

c)

c

d)

d

46.

a)

a

b)

b

c)

c

d)

d

47.

a)

a

b)

b

c)

c

d)

d

48.

a)

a

b)

b

c)

c

d)

d

49.

a)

1.63 cm

b)

2.67 cm

c)

3.32 cm

d)

4.23 cm

50.

A Channel section consists of span of AB,BC,CD .the length of the span AB is 2cm.The shear Flow at point A and B is 0 , 24.304 N/cm respectively. Determine the Shear force AB?

a)

24.304 N

b)

0 N

c)

15.5 N

d)

22 N

51.

A Channel section consists of span of AB,BC,CD .the length of the span AB is 2cm.The shear flow equation of the span AB is -3.038 ( 3s + s² /2 ).Determine the shear flow at B ?

a)

0 N/cm

b)

-24.304 N/cm

c)

32.08 N/cm

d)

48.72 N/cm

52.

A Channel section consists of span of AB,BC,CD .the length of the span AB is 2cm.The shear flow equation of the span AB is -3.038 ( 3s + s² /2 ).Determine the shear flow at A ?

a)

0 N/cm

b)

-24.304 N/cm

c)

32.08 N/cm

d)

48.72 N/cm

53.

a)

a. -24.304 N/cm

b)

b. 69.24 cm⁴

c)

c. 79.24 cm⁴

d)

D.89.24 cm⁴

54.

a)

0 N/cm

b)

-24.304 N/cm

c)

32.08 N/cm

d)

-48.72 N/cm

55.

The dimensions of the channel section are 100 mm * 200 mm * 10 mm subjected to shear force of 4 KN. Determine the moment of inertia about y axis.

a)

a) 16.66 *10^6 mm^4

b)

b) 26.66 *10^6 mm^4

c)

c) 18.66 *10^6 mm^4

d)

d.22.66 *10^6 mm^4

56.

The dimensions of the channel section are 100 mm * 200 mm * 10 mm subjected to shear force of 4 KN. Determine the shearflow equation of AB span. Take I_x = 26.22 * 10⁶ mm⁴

a)

a) -1.5*10^5 S

b)

b) 1.5*10^5 S

c)

c) -1.6*10^6 S

d)

d.22.66 *10^6 mm^4

57.

The dimensions of the channel section are 100 mm * 200 mm * 10 mm subjected to shear force of 4 KN. Determine the shear flow at the free end.

a)

a) -1.5*10⁶Nmm

b)

b) 0 Nmm

c)

c) 1.8 * 10⁶

d)

d.1.5*10⁶Nmm

58.

The dimensions of the channel section are 100 mm * 200 mm * 10 mm subjected to shear force of 4 KN. Determine the centroid?

a)

a) 28.68 mm,100 mm

b)

b) 100 mm,50 mm

c)

c) 40 mm,120 mm

d)

d.120 mm,40 mm

59.

In unsymmetrical section, if the external applied forces acting through the centroid then in addition to bending, _____ is also produced.

a)

a) Shear stress

b)

b) Twisting

c)

c) Fracture

d)

d.Creep

60.

The product of shear force and thickness is known

a)

a) Shear flow

b)

b) Shear stress

c)

c) Shear centre

d)

Bending stress

AIRCRAFT STRUCTURE - UNIT 3

Total questions: 60

Worksheet time: 59mins

Similar Resources on Wayground