Category: Engineering

How do you calculate noise exposure levels? For noise, given an 85-dBA exposure limit and a 3-dB exchange rate, the TWA is calculated according to the following formula: TWA = 10.0 × Log(D/l 00) + 85 where D = dose. What is the equipment that is used to measure a worker’s 8 hour time weighted […]

When a program lets the user know that an invalid choice has been made this is known as? Explanation: Input validation is also known as data validation which is used for validate or test the user input . In this program we input a age from user and validate this user input that . If […]

Does 609 certification expire? Your certification is good for life. However, in 2015 the Section 609 program was updated to include training information for working with R-1234yf.It is strongly recommended to re-certify to obtain this training if you plan to service R-1234yf vehicles. What is the difference between 608 and 609 certification? Section 608 technician […]

What is section method? The method of sections is a process used to solve for the unknown forces acting on members of a truss. The method involves breaking the truss down into individual sections and analyzing each section as a separate rigid body. How do you method a joint? The first step in the method […]

How is a string of Christmas lights wired? Christmas lights are wired as a “series” of lights along a single electrical path. There are two wires attached to the base of each bulb socket – one can be thought of as electricity “in” and the other is electricity “out”. The bulb provides the connection between […]

What is the 0.2% offset yield strength ΣY )? The 0.2% offset yield strength (0.2% OYS, 0.2% proof stress, RP0. 2, RP0,2) is defined as the amount of stress that will result in a plastic strain of 0.2%. This is illustrated by the blue line in Figure 1 below. This is the yield strength that […]

What is ACH infiltration? Infiltration measures The air exchange rate is also known as air changes per hour (ACH). ACH is the hourly ventilation rate, divided by the building volume. It can be calculated by multiplying the building’s CFM by 60, and then dividing by the building volume. ( What are heat infiltration losses? OVERVIEW. […]

Why must a voltmeter be connected in parallel with a resistor? Voltmeter is connected in parallel with circuit elements because it is used to measure the device’s voltage. If it’s connected in series then it will change the value of potential difference which will minimise the current in the circuit as it has very large […]

What is a third party beneficiary contract? A third-party beneficiary is a person or business that benefits from the terms of a contract made between two other parties. In law, a third-party beneficiary may have certain rights that can be enforced if the contract is not fulfilled. Which of the following is the likely result […]

What is differential scanning calorimetry used for? Differential scanning calorimetry (DSC) provides a relative measure of heat flow, which provides insight into molecular motion. The DSC is readily employed to determine the heat capacity of a polymer, and representative thermal transitions of a polymer, including the glass transition temperature and the melting point. How does […]