Questions in: Engineering

Right Answer:
Construction joints are used to separate different sections of a structure during construction, allowing for proper alignment and support. Contraction joints are designed to accommodate shrinkage and prevent cracking as materials cool or dry. Expansion joints allow for movement due to temperature changes, preventing damage by absorbing the expansion and contraction of materials.

Right Answer:
The weight of asphalt concrete typically ranges from 140 to 150 pounds per cubic foot (pcf) or about 2,240 to 2,400 kilograms per cubic meter (kg/m³).

Right Answer:
The amount of steel required for a 1 square meter slab is typically around 80 to 100 kg, depending on the design and load requirements.

Right Answer:
Yes, PPC (Pozzolana Portland Cement) and PSC (Portland Slag Cement) can be used for mix design, as both types of cement have suitable properties for various concrete applications.

Right Answer:
- **Pressure**: The force exerted by a fluid per unit area, typically measured in pascals (Pa) or pounds per square inch (psi).
- **Temperature**: A measure of the thermal energy of a substance, indicating how hot or cold it is, usually measured in degrees Celsius (°C) or Fahrenheit (°F).
- **Flow**: The movement of fluid from one place to another, often measured in volume per unit time, such as liters per minute (L/min) or gallons per minute (GPM).
- **Level**: The height of a fluid in a container or system, indicating how full it is, often measured in meters or inches.

Right Answer:
b) silica fume

Right Answer:
The natural frequency of vibration is the frequency at which a system tends to oscillate in the absence of any driving force. To find the natural frequency of a circular disk of radius 'r' oscillating inside a semi-circular ring of radius 'R', you can use the formula:

[ f_n = frac{1}{2pi} sqrt{frac{k}{m}} ]

where ( k ) is the effective stiffness of the system and ( m ) is the mass of the disk. The effective stiffness can be derived from the geometry and boundary conditions of the system, considering the forces acting on the disk due to its oscillation within the ring.

Right Answer:
In my first year on the job, I want to fully understand the company's processes and systems, build strong relationships with my team, and contribute to successful project completions while enhancing my technical skills.