Which of the following factors are associated with the behaviour of sand mass during earthquake to cause liquefaction ?
1. Number of stress cycles
2. The frequency, and amplitude of vibration of waves generated by an earthquake
3. Characteristics of sand
4. Relative density
Select the correct answer using the codes given below :

A cold drawn
seamless steel tubing subject to internal pressure, has a diameter of 6
cm and wall thickness of 0.2 cm. The ultimate strength of steel is 3600
kg/cm². The bursting pressure (in kg/cm²) is

Consider the following statements :
A : In masonry, bricks are joined together by cement mortar.
B : Cement mortar adheres more effectively to brick surface than any other material.

A cylindrical shell made of mild steel plate of 100 cm diameter is to be subjected to an internal pressure of 10 kg/cm². If the material yields at 2000 kg/cm², assuming factor of safety as four and using maximum principal stress theory, thickness of the plate will be

The graphical condition for equilibrium of concurrent forces is that

The following steps are involved in making a spigot and socket joint of cast iron pipes used in water supply systems :
1. Tarred gasket or hemp yarn in wrapped around the spigot.
2. The sipgot end is centered into the socket end of the preceding pipe.
3. A joining ring end is placed around the barrel and against the face of the socket.
4. The gasket or hemp yarn in caulked slightly.
5. Molten pig lead is poured and then caulked.
The correct sequence of these steps is

The absolute maximum Bending Moment in a simply supported beam of span 20 m due to moving udl of 4 t/m spanning over 5 m is

The plastic modulus of a section is 5 x 10^-4m³. Its shape factor is 1.2 and the plastic moment capacity is 120 kNm. What is the value of the yield stress of the material ?

According to ICAO recommendations, what is the rate of elevation correction for the runway above MSL ?

What is the use of a station pointer ?