Category: Structural Analysis Objective Questions

250+ TOP MCQs on Statically Indeterminate Structures and Answers

Structural Analysis Multiple Choice Questions on “Statically Indeterminate Structures”.

1. Most of the real world structures are statically determinate.
State whether the above statement is true or false.
a) True
b) False
Answer: b
Clarification: Most of the real world structures are statically indeterminate owing to added supports or member or general form.

2. All reinforced concrete buildings are most of times:-
a) Statically determinate
b) Statically indeterminate
c) Mixture
d) Unstable
Answer: b
Clarification: This is because columns and beams are continuous in these cases over joints and supports.

3. in most cases, for a given loading maximum stress and deflection of an indeterminate structure are __________ than that of a determinate one.
a) Larger
b) Smaller
c) Larger for small load
d) Smaller for larger load
Answer: b
Clarification: Indeterminate structure deflects lesser than a determinate one.

4. Which structure will perform better during earthquake?
a) Statically determinate
b) Statically indeterminate
c) Both
d) Depends upon magnitude of earthquake
Answer: b
Clarification: Indeterminate structure has a tendency to redistribute its load to its redundant supports in case of overloading.

5. There are two beams of equal length L and a load P is acting on centre of both beams. One of them is simply supported at both ends while the other one is fixed at both ends. Deflection of centre of simply supported beam will be __________ times that of defection of centre of fixed beam.
a) 1
b) 2
c) 3
d) 4
Answer: d
Clarification: Maximum moment developed in simply supported beam will be twice that of fixed supported and hence, we can find deflections.

6. Which type of structure would cost less in terms of materials?
a) Statically determinate
b) Statically indeterminate
c) Both will cost equally
d) Depends upon loading
Answer: b
Clarification: Statically indeterminate would cost less as they can support a loading with thinner members and increased stability.

7. Which type of structure would cost less in terms of supports?
a) Statically determinate
b) Statically indeterminate
c) Both will cost equally
d) Depends upon loading
Answer: a
Clarification: Supports and joints of indeterminate structures are costly compared to that of a determinate one.

8. Differential settlement is problematic to which type of structure?
a) Statically determinate
b) Statically indeterminate
c) Both
d) Neither
Answer: b
Clarification: It causes development of internal stress in statically indeterminate structures.

9. Fabrication errors don’t cause additional stresses in statically indeterminate structures.
State whether the above statement is true or false.
a) True
b) False
Answer: b
Clarification: Fabrication errors do cause generation of additional stresses in statically indeterminate structures.

10. If in the above problem in Q5, if load P is excessively increased in simply supported beam, then where would a hinge like point form?
a) At one of the ends
b) At both ends
c) At centre
d) At centre as well as both ends
Answer: b
Clarification: On application of excessive load, a hinge/pin like point forms at the centre of beam.

250+ TOP MCQs on Types of Structural Loads – 1 and Answers

Structural Analysis Multiple Choice Questions on “Types Of Structural Loads – 1”.

1. Which of the following structural loads are not applied commonly to a building?
a) Dead load
b) Rain load
c) Live load
d) Environmental load
Answer: b
Clarification: Rest three types of loads are always applied to buildings.

2. Dead load comprises of:-
a) Permanently attached loads
b) Temporarily attached loads
c) Permanent as well as temporary loads
d) Snow load
Answer: a
Clarification: They include weight of structural frame and that of walls, roofs etc.

3. Live loads, with time can vary in:-
a) Magnitude
b) Position
c) Neither position nor magnitude
d) Position as well as magnitude
Answer: d
Clarification: They are caused by occupancy, use and maintenance of buildings.

4. Most of the loads applied to a building are environmental load.
State whether this statement is true or false.
a) True
b) False
Answer: b
Clarification: Most of the loads are dead followed by live loads.

5. Building codes require the partition load to be considered even without partition if live load is less than:-
a) 60 psf
b) 70 psf
c) 80 psf
d) 90 psf
Answer: c
Clarification: Modern buildings with less live load initially have high chances to acquire partition after some years.

6. In the method used to establish the magnitude of live load, what is the reference time period?
a) 30 years
b) 35 years
c) 50 years
d) 60 years
Answer: c
Clarification: Reference period is typically assumed to be around 50 years so as to establish magnitude of ASCE-02 live loads.

7. Impact loads are equal to the sum of the magnitude of the loads actually caused and the magnitude if the loads had they been dead loads.
State whether this statement is true or false.
a) True
b) False
Answer: b
Clarification: Impact loads are equal to the difference between the above mentioned entities.

8. Impact load results from which type of effects of loads applied?
a) Static
b) Dynamic
c) Static and dynamic
d) Neither static nor dynamic
Answer: b
Clarification: For static load, impact effects are short lived.

9. How does an increase in the pitch of the roof affects the amount of load that can be placed on it?
a) It increases
b) It decreases
c) Remains constant
d) Depends upon case
Answer: b
Clarification: As rise increases w.r.t span, load carrying capacity decreases.

10. If R1 = 1.1 and R2 = 1.2, then what is value of Lr(in psf)?
a) 26.1
b) 26.2
c) 26.3
d) 26.4
Answer: d
Clarification: Lr = 20 * R1 * R2.

250+ TOP MCQs on Kinematic Indeterminacy of Trusses and Answers

Structural Analysis Multiple Choice Questions on “Kinematic Indeterminacy of Trusses”.

1. The degree of freedom for a pin jointed plane frame is given by 3j – m – r.
a) True
b) False
Answer: b
Clarification: The degree of freedom for a pin jointed plane frame is given by 2j–r, where j is the number of joint and r is the number of reactions.

2. The degree of freedom for a pin jointed space frame is given by ____
a) 2j – r
b) 3j – r
c) 3j – m – r
d) 6j – r
Answer: b
Clarification: The degree of freedom for a pin jointed space frame is given by 3j – r, where j is the number of joints and r is the number of reactions.

3. In case of pin jointed plane frame, rotational displacement of the nodes are not considered.
a) True
b) False
Answer: a
Clarification: In case of pin jointed plane frame, rotational displacement of the nodes are not considered because member are not subjected to bending. Members are subjected to axial forces only.

4. Identify the correct statements of the followings.
a) Two degrees of freedom are available at each joint of pin jointed plane frame
b) Six degrees of freedom are available at each joint of pin jointed space frame
c) Four degrees of freedom are available at each joint of rigid jointed plane frame
d) Three degrees of freedom are available at each joint of pin jointed space frame
Answer: a
Clarification: Each joint of pin jointed plane frame, allows horizontal and vertical sway of the joint. Therefore, degree of freedom is two at a joint of pin jointed plane frame.

5. Calculate the kinematic indeterminacy of the following pin jointed plane frame.

a) 2
b) 6
c) 12
d) 18
Answer: c
Clarification: The truss is supported by hinged support at both ends. Hinged support in a pin jointed plane frame does not offers any degree of freedom as rotation is not considered. For the given truss, it consists of six pin joint offering two degree of freedom each. Therefore, the degree of freedom is 12.

6. Calculate the kinematic indeterminacy of the following pin jointed plane frame.

a) 12
b) 13
c) 14
d) 15
Answer: b
Clarification: The truss is supported by hinged support at one end and roller support at other end. Hinged support in a pin jointed plane frame does not offers any degree of freedom as rotation is not considered. But roller support offers horizontal movement and hence degree of freedom is 1. For the given truss, it consists of six pin joint offering two degree of freedom each. Therefore, the degree of freedom is 12 + 1 = 13.

7. Calculate the kinematic indeterminacy of the following pin jointed plane frame.

a) 8
b) 9
c) 10
d) 12
Answer: b
Clarification: The truss is supported by hinged support at one end and roller support at other end. Hinged support in a pin jointed plane frame does not offers any degree of freedom as rotation is not considered. But roller support offers horizontal movement and hence degree of freedom is 1. For the given truss, it consists of four pin joint offering two degree of freedom each. Therefore, the degree of freedom is 8 + 1 = 9.

8. Calculate the kinematic indeterminacy of the following pin jointed plane frame.

a) 8
b) 10
c) 12
d) 14
Answer: a
Clarification: The truss is supported by hinged support at both ends. Hinged support in a pin jointed plane frame does not offers any degree of freedom as rotation is not considered. For the given truss, it consists of four pin joint offering two degree of freedom each. Therefore, the degree of freedom is 8.

9. Calculate the kinematic indeterminacy of the following pin jointed plane frame.

a) 4
b) 5
c) 6
d) 8
Answer: a
Clarification: The truss is supported by hinged support at both ends. Hinged support in a pin jointed plane frame does not offers any degree of freedom as rotation is not considered. For the given truss, it consists of two pin joint offering two degree of freedom each. Therefore, the degree of freedom is 4.

10. Calculate the kinematic indeterminacy of the following pin jointed plane frame.

a) 4
b) 6
c) 8
d) 10
Answer: c
Clarification: The truss is supported by hinged support at both ends. Hinged support in a pin jointed plane frame does not offers any degree of freedom as rotation is not considered. For the given truss, it consists of four pin joint offering two degree of freedom each. Therefore, the degree of freedom is 8.

250+ TOP MCQs on Approximate Analysis in Trusses and Vertical Loads on Building Frames and Answers

Structural Analysis Multiple Choice Questions on “Approximate analysis in trusses and Vertical Loads on Building Frames”.

1. Approximate analysis is done on a :-
a) Determinate structures
b) Indeterminate structures
c) Determinate and indeterminate structures
d) Depends upon load applied
Answer: a
Clarification: It is done on a determinate structure which is made by converting an indeterminate one.

2. Exact analysis is referred to which type of analysis?
a) Statically determinate analysis
b) Statically indeterminate analysis
c) Doesn’t depend upon determinacy
d) Depends upon load applied
Answer: b
Clarification: Statically indeterminate analysis is refereed as exact analysis while the other one is referred as approximate analysis.

3. How many assumptions do we have to make to solve an indeterminate truss?
a) Always 3
b) Always 2
c) Equal to its degree of indeterminacy
d) One less than its degree of indeterminacy
Answer: c
Clarification: For example, 3 assumptions will have to be made if degree of indeterminacy is three.

4. What is a reasonable assumption if diagonals of a truss system are long and slender?
a) They can’t carry tensile force
b) They can’t carry compressive force
c) They can’t carry force
d) They can’t carry large force
Answer: b
Clarification: If they are long and slender, ten it can be assumed that they can’t carry compressive force as they can easily buckle.

5. If a long and slender diagonal is appearing to carry compressive load, then it is assumed that:-
a) It carries a tensile load
b) It carries a compressive load
c) It carries no load
d) It carries large load
Answer: c
Clarification: Since it can easily buckle, it is assumed to be a zero-force member.

6. If both diagonal members are constructed from channels, then the how much load will be carried by compressive member?
a) 0
b) 1/4 th of panel shear
c) Half of panel shear
d) 3/4 th of panel shear
Answer: c
Clarification: In these cases, diagonals are equally capable of supporting tensile and compressive forces. So, they are assumed to carry half the panel shear.

7. In which case is only members within a localized region of structure are considered?
a) When disturbance within a member causes a lot of disturbances in outside region
b) When disturbance within a member causes little of disturbances in outside region
c) When lower loads are applied
d) When larger loads are applied
Answer: b
Clarification: This technique is used only when disturbance within a member causes little of disturbances in outside region.

8. Points of inflection can be considered as:-
a) Pin support
b) Roller support
c) Link support
d) Pin
Answer: d
Clarification: These points can be considered as pin as there is no moment at points of inflection.

9. If a beam is supported by fixed support at both its end then point of inflection will lie at what distance from end points (L is length of beam).
a) 0
b) 0.11L
c) 0.21L
d) 0.31L
Answer: c
Clarification: It can shown using exact analysis methods that both inflection points lay at a distance of 0.21L from end points.

10. If a beam is supported by pin supports at both its end then point of inflection will lie at what distance from end points (L is length of beam).
a) 0
b) 0.11L
c) 0.21L
d) 0.31L
Answer: a
Clarification: In case of pin supports, it will be a determinate case and can be solved very easily.

11. In actual cases, at what distance are point of inflections assumed from end points (L is length of beam).
a) 0
b) 0.1L
c) 0.2L
d) 0.3L
Answer: b
Clarification: In actual cases, supports will provide some flexibility at ends, so we take an average value as our assumption.

12. In cases of girders, It is assumed that it:-
a) Does support axial force
b) Does not support axial force
c) Does not support shear force
d) Does not support axial and shear force
Answer: b
Clarification: It is one of the three assumptions made as degree of indeterminacy of a column-girder system is 3.

250+ TOP MCQs on Statically Indeterminate Structures-2 and Answers

Structural Analysis online quiz on “Qualitative Influence Lines For Frames”.

1. Force-displacement requirements are not necessary to be satisfied for statically indeterminate structures.
State whether the above statement is true or false.
a) true
b) false
Answer: b
Clarification: Force-displacement requirement along with equilibrium and compatibility conditions are required to satisfy for a statically indeterminate structure.

2. Force-displacement requirement of statically indeterminate structures depend upon which factor?
a) material’s response
b) magnitude of load applied
c) supports
d) position of load applied
Answer: a
Clarification: It depends upon material’s response. We have assumed the material to linear elastic for further discussions.

3. Who of the following initially developed force method?
a) Muller
b) Breslau
c) Mohr
d) James clerk Maxwell
Answer: d
Clarification: Maxwell originally developed force method. Later options then developed this method.

4. Which of the following conditions form the basis of this method?
a) equilibrium conditions
b) force-displacement conditions
c) load applied
d) compatibility conditions
Answer: d
Clarification: This method is based on compatibility conditions and therefore it is also known as compatibility method.

5. Redundant forces are calculated in last step while using force method.
State whether the above statement is true or false.
a) true
b) false
Answer: b
Clarification: Redundant forces are calculated in initial steps in this method. Rest of forces is calculated by using these values.

6. Which of the following conditions form the basis of displacement method?
a) equilibrium conditions
b) force-displacement conditions
c) load applied
d) compatibility conditions
Answer: b
Clarification: Force displacement relations are written in the first step of displacement method.

7. Which of the following conditions is used in both force and displacement method in any stage?
a) equilibrium conditions
b) force-displacement conditions
c) load applied
d) compatibility conditions
Answer: b
Clarification: Force displacement equations are used in both methods.

8. Flexibility coefficients are used in which of the following method?
a) force method
b) displacement method
c) both force and displacement method
d) virtual force method
Answer: a
Clarification: Coefficient of unknowns while using force method is known as Flexibility coefficients.

9. Stiffness coefficients are used in which of the following method?
a) force method
b) displacement method
c) both force and displacement method
d) virtual force method
Answer: b
Clarification: Coefficient of unknowns while using displacement method is known as stiffness coefficients.

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250+ TOP MCQs on Types of Structural Loads – 2 and Answers

Structural Analysis Interview Questions and Answers on “Types Of Structural Loads – 2”.

1. Find the value of reduction factor R2 if F (rise to span ratio in inches) is given to be 5.
a) 0.95
b) 0.96
c) 0.97
d) 0.98
Answer: a
Clarification: R2 = 1.2 – 0.05F if 4 < F < 12.

2. What will be the value of reduction factor R1 if value of At is given to be 500ft2
a) 0.5
b) 0.6
c) 0.7
d) 0.8
Answer: c
Clarification: R1 = 1.2-.001At if 200ft2 < At < 600ft2.

3. Which type of drainage system will collect the rainwater?
a) Primary
b) Secondary
c) Tertiary
d) Primary and tertiary
Answer: a
Clarification: Primary system will collect the rainwater through surface drains on the roof and direct it to the storm sewers.

4. What will be the rain load (in psf) if ds is 2 inches and dh is 1 inches?
a) 5.2
b) 10.4
c) 15.6
d) 20.8
Answer: c
Clarification: R= 5.2(ds + dh).

5. Which out of the following is the static head?
a) ds
b) dh
c) ds + dh
d) ds – dh
Answer: a
Clarification: Static head is the depth of water on the undeflected roof up to the inlet of the secondary drainage system when the primary one is blocked.

6. What will be the flow rate (in gallons per minute) if A is 10 ft2 and rainfall intensity is 2 inches per hour?
a) 0.208
b) 0.0208
c) 2.08
d) 20.8
Answer: a
Clarification: Q = 0.0104Ai, where I is the intensity of rainfall in inches per hour.

7. What is the value of average wind pressure (in psf) for height more than 100ft which is generally adopted?
a) 10
b) 20
c) 30
d) 40
Answer: c
Clarification: 20psf for 0-100 and 30psf for ht. > 100ft.

8. In which type of roofs are scuppers used?
a) Large area
b) Small area
c) Large width
d) Small width
Answer: a
Clarification: Scuppers are holes which are used to drain out extra clogged rain water.

9 In which of the following cases is ASCE procedure not applied?
a) Enclosed structure
b) Regular shape grid
c) High rise structure
d) Roof with 60 ft. height
Answer: c
Clarification: This method is applied in low rise structures along with enclosed, regular shaped and that with s roof height <=60ft.

10. What will be the wind pressure (ps) if adjustment factor (λ) is 2, importance factor is 5, while ps30 is 80N/m2?
a) 600 N/m2
b) 700 N/m2
c) 800 N/m2
d) 900 N/m2
Answer: c
Clarification: ps = λIps30.

11. What will be the velocity pressure at a height of 80ft. if k80 = 0.5, k80t = 1.2, kd = 1.3, V = 120mph and I = 1.67?
a) 45.019
b) 46.019
c) 47.019
d) 48.019
Answer: d
Clarification: qz = 0.00256 kz kzt kd v2I, where qz is wind pressure at height z.

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