Category: Engineering

What two types of plays did the Greeks invent? There were two main types of plays that the Greeks performed: tragedies and comedies. Tragedy – Greek tragedies were very serious plays with a moral lesson. They usually told the story of a mythical hero who would eventually meet his doom because of his pride. Comedy […]

Why is it imperative to file tube ends after being cut? The use of a saw will decrease the amount of work hardening of the tubing during the cutting operation. After sawing, file the end of the tube square and smooth, removing all burrs. Why do we cut tubing? Tube cutting. A new piece of […]

Is the phrase positive to positive negative to ground is correct when jump starting a car? This is a correct phrase that is important to learn when owning any type of vehicle. When a car battery is dead, it can usually be jump started by using another cars battery or a portable battery charger. It […]

What is the next state when both J 1 and K 1 with present state as 1? When both J and K are equal to 1, the next state is equal to the complement of the present state, that is, Q(next) = Q’…. J K Q(next) 0 0 Q 0 1 0 1 0 1 […]

How does the period of the pendulum depend on the mass? The period of a pendulum does not depend on the mass of the ball, but only on the length of the string. Two pendula with different masses but the same length will have the same period. Two pendula with different lengths will different periods; […]

How many types of positive displacement pumps are there? three What is another name for positive displacement pumps? PD pumps Is centrifugal pump a positive displacement pump? A centrifugal pump is categorised as a non-positive displacement pump. Traps a certain amount of liquid and forces it from the suction to the discharge port. Flow rate […]

How do you detect a back edge in DFS traversing? To detect a back edge, keep track of vertices currently in the recursion stack of function for DFS traversal. If a vertex is reached that is already in the recursion stack, then there is a cycle in the tree. The edge that connects the current […]

How do you create a ER diagram for a database? How to Draw ER Diagrams Identify all the entities in the system. An entity should appear only once in a particular diagram. Identify relationships between entities. Connect them using a line and add a diamond in the middle describing the relationship. Add attributes for entities. […]

What is the flame temperature of acetylene? approximately 3,160°C Why the temperature of a flame is lower than the adiabatic flame temperature? Its temperature is lower than the constant volume process because some of the energy is utilized to change the volume of the system (i.e., generate work). Why does adiabatic flame temperature increase with […]

Which of the following is the graphical representation of the stress at a point? Mohr circle is a graphical representation of plane stress which helps in determining the relationships between normal and shear stresses acting on an inclined plane at a point in a stressed body. How do you find principal stress direction? In 2-D, […]