Category: Engineering

How does temperature affect conductivity of semiconductors? As the temperature increases, more electrons get the energy to jump from Conduction band to valence band, and thereby increases the conductivity of the semiconductor. How does temperature affect electrical conductivity of metals? When temperature increases, the thermal speed of the electrons increases as well as, the amplitude […]

Do 2-cycle engines need oil gas? Two-stroke (two-cycle) engines require you to mix the oil with the gas in exact amounts so the oil acts as a lubricant for the crankcase, while four-stroke engines take oil and gas separately. In a 2-stroke engine, it takes one full revolution (2 stages) to complete 1 power stroke. […]

How do you change the resistance of a resistor? Sometimes you need a resistor with a value you don’t have in your kit. Instead of ordering and wanting for a resistor with a value you need you can change the resistance of a resistor by using another resistor or many. By installing resistors in a […]

What is the importance of instrumentation in industries? Instrumentation is the basic process control in industry. In industrial control a wide number of variables temperature, flow, level, pressure, and distance can be sensed simultaneously. All of these can be interdependent variables in a single processing require a complex microprocessor system for total control. What is […]

What type of light is emitted from a LED? LED is an abbreviation of Light Emission Diode, and is a device which emits light by flowing a current to the p-n junction like a semiconductor laser (LD). It emits various wavelength lights in the ultraviolet, visible and infrared regions, corresponding to its band gap energy. […]

How do you find the angle of twist? Angle of twist T is the internal torque (Nm), L is the length of segment (m), J is the polar moment of inertia (m4) and G is the shear modulus (GPa). Answer obtained is in radians (rad), but we usually convert it to degrees. How is angle […]

What is hypothesis and examples? Usually, you don’t want to state a hypothesis as a question. You believe in something, and you’re seeking to prove it. For example: If I raise the temperature of a cup of water, then the amount of sugar that can be dissolved in it will be increased. What is a […]

Which of the following is a characteristic of urban sprawl? Urban Sprawl is generally characterized by discontinuous, haphazard, uncoordinated, unplanned or poorly planned urban development. It is characterized by low density, excessive consumption of land, automobile dependence, separation of land-uses, social segregation and displeasing aesthetics. What are the benefits of urban sprawl? Thanks to less […]

What is single point and multi point cutting tool? Single point cutting tools contain only one main cutting edge in the cutter body. Multi point cutting tools contain more than one (even up to hundreds) cutting edges in the cutter body. While machining with multi point cutting tool, more than one cutting edges simultaneously engage […]

What is the difference between disturbed and undisturbed soil samples? Answer. Disturbed soil samples do not retain the in-situ properties of the soil during the collection process. Undisturbed soil samples retain the structural integrity of the soil and have a high recovery rate within the sampler. What is a disturbed soil sample? Disturbed soil samples […]