Category: Engineering

What were the criteria and constraints of the problem facing the engineers? Explain the terms “criteria” and “constraints.” Criteria are things the design needs to do in order to be successful–its requirements. Constraints are limitations on the design. These may be materials available, the cost of the materials, the amount of time they have to […]

What is microscopic cross section? The microscopic cross-section “σ” is used to characterize the probability of reaction between a neutron and an individual particle or nucleus. A neutron can have many types of interactions with a nucleus (Ragheb, 2011). What is macroscopic cross section? The macroscopic cross-section represents the effective target area of all of […]

What does %d mean in C? decimal integer How do I print %d output? 2 Answers. printf(“%%d”) , or just fputs(“%d”, stdout) . To get a % you need to have %% . Why do we use the format specifier %d instead of LF? To use the %d conversion specifier to print a double value […]

What is Derived Air Concentration? The concentration of a given radionuclide in air which, if breathed by the reference man for a working year of 2,000 hours under conditions of light work (with an inhalation rate of 1.2 cubic meters of air per hour), results in an intake of one annual limit on intake (ALI). […]

What is a Type B-1 fire extinguisher? B-1 Extinguishers are USCG approved and meet the need for a Type B, Size 1 USCG approved Fire Extinguisher. Amerex B-I Fire Extinguishers must be: Dry Chemical, ABC, or Purple K: 2 lbs or larger. Carbon Dioxide (Co2): 5 lbs or larger. Under what conditions is a Type […]

What gear should I be in going up a steep hill? The low gears are best when driving up a steep hill. Before you change up a gear, make sure that you accelerate first, a bit more than you would on a flat road. Is it bad to leave your car parked in gear? Use […]

How do you calculate plume rise? Solution: Calculate wind speed at stack height. u = u1 * (z/z1)p = 3 * (50/10)0.15 = 3.8 m/sec. Check for downwash: Vs / u >= 1.5 (downwash conditions need not be considered) = 20.0/3.8 = 15.237 >1.5 (therefore downwash need not be considered) Calculate plume height, Δh. Calculate […]

What do you understand by the term motion? Motion, in physics, change with time of the position or orientation of a body. Motion along a line or a curve is called translation. Motion that changes the orientation of a body is called rotation. What is the change in position of an object called? In physics, […]

What is the minimum length of a fillet weld? “The minimum length of a fillet weld shall be at least four times the nominal size, or the effective size of the weld shall be considered not to exceed 25% of its effective length.” Can you Joint end grain? Yes, it’s possible to joint end grain. […]

What is the standard size of door and windows? The standard size for an exterior door is 80 inches by 36 inches which is 6 ft, 8 inches by 3 ft. 96 inches or 8 ft. is now very common for newer homes and stock exterior doors are also commonly available in 30 and 32-inch […]