Engineering Questions with Answers - Multiple Choice Questions
Strength of Materials MCQs Euler’s Theory at Eccentrically Loaded
Long axially loaded columns tends to deflect about ___________
a) Moment of inertia
b) Effective length
d) Safe loading
Explanation: A long axially loaded column tends to deflect about the axis of least moment of inertia the least radius of gyration and it should be used for determining the slenderness ratio.
What is the effective length of a column at both ends fixed?
Answer: c<br />
Explanation: The effective length of a column at both ends fixed is L =l/2.
|End condition||Effective length|
|Both ends hinged||L = l|
|Both ends fixed||L =l/2|
Which of the following is the method of removing the temporary hardness of water?
a) Lime soda method
b) Base exchange process
Explanation: When the water is boiled up to a temperature of 80 degree, most of the bacteria will be killed and bicarbonates of calcium and magnesium are also eliminated.
The application of chlorine beyond the stage of break point is _________
a) Double chlorination
b) Post pollination
c) Super chlorination
d) Breakpoint chlorination
Explanation: Super chlorination is a term which indicates the addition of an excessive amount of chlorine that is 5 to 15 mg / l to the water that is the application of chlorine beyond the stage of break point.
Which of the following methods of disinfection is usually adopted in swimming pools?
a) Excess lime treatment
b) Iodine – Bromine method
c) Pottasium permanganate method
d) Ultraviolet rays method
Explanation: Ultraviolet rays are highly disinfectants and kill the bacteria. The rays penetrate in water and kill the bacteria. This process is very costly and requires technical skill and costly equipment. This method is adapted generally in swimming pools.
Hardness due to calcium bi carbonate can be removed by ___________
b) Excessive lime
d) Soda treatment
Explanation: Lime is generally used as a water purification material the excess lime treatment of water about 99.9% to 100%. The lime excess line l is the pH value of water making extremely alkaline.
__________ is used for spans ranging from 9 m to 15 m.
a) King post truss
b) Queen post truss
c) Coral truss
d) Roof truss
Explanation: Queen post truss is used for spans 9 m to 15 m. It consists of principal rafters, common rafters, purlins. The queen posts are connected with the help of a straining beam.
__________ is provided to prevent the movement of the post due to loads in Queen post truss.
b) Eaves board
c) Straining beam
d) Ridge beam
Explanation: The queen posts are connected with the aid of straining been of the upper ends and by a straining sill at the lower end to prevent the movement of post due to loads. In this truss, the straining beam acts as a compression member. Whereas the queen post act as a tension member.
___________ is a combination of king post truss and queen post truss.
a) Steel slope truss
b) Pratt truss
c) Mansard roof truss
d) Fan truss
Explanation: Mansard truss is a combination of king post truss and queen post truss. This truss is used to obtain the maximum space for living purposes. The general height of the roof is comparatively kept low.
In mansard truss, the upper slope is _________
Explanation: The mansard has two different slopes, the lower slope should not be steeper than 75° and upper slope not greater than 30 degrees. The construction of the various joints is similar to the king post and queen post trusses.
_______ trusses are generally adopted for greater fans.
b) Cast Iron
Explanation: The Steel trusses are adopted for greater spans as the timber trusses become heavy and uneconomical. Steel trusses are much stronger than timber trusses and are more fire resisting and durable. They cannot be attacked by white ants.
Steel trusses are generally constructed with __________
a) Mild steel
b) HYSD steel
c) TMT steel
d) JSW steel
Explanation: Generally, most of the Steel trusses are fabricated and constructed with mild steel. They consist of angles because the angle sections can effectively resist both compressive and tensile stresses.
__________ consists generally of single or double angles.
Explanation: Angles can be manufactured economically instead of T sections for rafters. Strut consists of generally single or double angles, one or two angles back to back can be used as a tie beam.
A queen closer is placed after ______ in the heading course.
a) Quoin header
b) Brick bat
Explanation: The length of queen closer is usually kept equal to thickness of the wall. A queen closer is placed after every quoin header in a heading course, when the thickness of wall is 200 mm or above.
The size of frog in bricks is ___________
a) 10×4×4 cm
b) 10×9×4 cm
c) 10×4×1 cm
d) 9×9×4 cm
Explanation: The depression provided on the size of brick during its manufacture is called the frog. According to BIS, the size of the frog in brick is 10×4×1 cm. Frog reduces the weight of a brick, to lay conveniently.