DHARM
N-GEO\OBJ.PM5 893OBJECTIVE QUESTIONS 893
- The most popular method of placing an open caisson in position is .............
- The well foundation resembles the ............ type of caisson.
- The body of a well foundation is known as the .............
- The concrete slab placed between a well and the super-structure, to serve as the bearing
pad for the latter, is called ............. - The depth of the well below the lowest scour level is known as its .............
- The lateral stability of a well foundation in clay is analyzed by ............ hypothesis.
- Terzaghi’s ............ concept is commonly used in the analysis of the lateral stability of a
well foundation, although it is, strictly speaking, not applicable. - ............ method is presently considered to be the most rational one for the analysis of
lateral stability of a well foundation. - The centre of rotation for a heavy well under lateral loads is considered to be at ............
. - Remedial measures are required to correct ............ which occur during the sinking of a
well foundation. - That part of soil mechanics which deals with the behaviour of soil under dynamic load-
ing conditions is known as ............. - A few important sources of dynamic forces are: (a) ............ (b) ............ (c) ............ (d)
............. - Frequency is defined as ............ and its units are .............
- The number of independent co-ordinates required to completely describe the motion of a
system is called its ............. - The simplest form of a periodic motion is .............
- The maximum displacement of a vibrating system from its equilibrium position is called
its ............. - Frequency and period are ............ related.
- A body in space has Degree of freedom of .............
- The Degree of freedom of a two-mass two-spring system, constrained to move vertically
without rotation, is ............. - The rotation of a block about z-axis is known as ............ or ............ vibration.
- The number of principal modes of vibration need not always reflect the Degree of free-
dom – True/False. - Combinations of more than one mode of vibration are called .............
- Undamped free vibration of a system occurs at a frequency known as its .............
- The continuous influence of an external force is required to sustain a ............ vibration
of a system. - The extenal force in a forced vibration is also called the ............ force.
- Undamped free vibration of any system in practice is only hopothetical. True/False.
- When the exciting frequency equals the natural frequency of the system, a phenomenon
called ............ occurs, and the consequence is that the ............ becomes a maximum.