HotelInfantesAgres - Tempat Tanya Jawab Pelajaran & Ilmu Pengetahuan Logo

Questions in engineering

[Jawaban] What is the primary function of a fire suppression foam in firefighting? A. To cool the fire B. To smother the fire by cutting off oxygen C. To absorb heat from the fire D. To neutralize the flammable substance What is the primary risk of using water to extinguish electrical fires? A. It can cause short circuits and electrocution B. It increases the spread of fire C. It produces toxic fumes D. It damages firefighting equipment What is the primary hazard associated with smoke inhalation during a fire? A. Loss of visibility B. Toxicity leading to respiratory failure C. Increase in body temperature D. Dehydration Which firefighting technique is used to cool down superheated gases in a confined space? A. Ventilation B. Fog attack C. Direct attack D. Backdraft prevention What is the primary role of fire-resistant coatings in building materials? A. To prevent Ignition B. To delay structural collapse C. To reduce smoke production D. To increase thermal conductivity Which type of fire extinguisher is most suitable for Class D fires? A. Water extinguisher B. Foam extinguisher C. Dry powder extinguisher D. Carbon dioxide extinguisher

[Jawaban] If a safety net is more than 10 feet below the work space, how far does it have to extend past the sides of the work space? A. 10 feet B. 13 feet C. 15 feet D. 18 feet

[Jawaban] Solve the initial value problem below using the method of Laplace transforms. [tex]w^{\prime \prime}-6 w^{\prime}+9 w=45 t+60, w(-1)=2, w^{\prime}(-1)=1[/tex] Click here to view the table of Laplace transforms. Click here to view the table of properties of Laplace transforms. [tex]w(t)=[/tex]

[Jawaban] A stainless steel coil that is built like a refrigeration coil and allows a high-efficiency unit to move into the 90+ percent efficiency range is called: Select one: A. A serpentine coil heat exchanger. B. A hybrid coil recuperater. C. A recuperative coil. D. A serpentine coil heat recuperater.

[Jawaban] Which of the following customer concerns will NOT develop as a manual transmission wears? A. Popping out of gear B. The clutch slips on acceleration C. Becoming difficult to shift D. Making growling noises

[Jawaban] Solve the initial value problem below using the method of Laplace transforms. [tex]w^{\prime \prime}-6 w^{\prime}+9 w=45 t+60, w(-1)=2, w^{\prime}(-1)=1[/tex]

[Jawaban] A drilling machine is to have six speeds ranging from [tex]$50 rev/min$[/tex] to [tex]$750 rev/min$[/tex]. The speeds form a geometric progression.

[Jawaban] What is the difference between a 90 percent furnace with a sealed combustion system and a typical 90 percent furnace? Select one: A. Sealed combustion units use household vented air for combustion. B. Sealed combustion units require combustion air to be piped in from the outside. C. Sealed combustion units may use PVC pipe for venting material. D. Sealed combustion units do not produce any combustion products.

[Jawaban] Solve the initial value problem below using the method of Laplace transforms. [tex]w^{\prime \prime}-12 w^{\prime}+36 w=180 t+696, w(-4)=-5, w^{\prime}(-4)=-25[/tex] Click here to view the table of Laplace transforms. Click here to view the table of properties of Laplace transforms. [tex]w(t)=\square[/tex] (Type an exact answer in terms of [tex]e[/tex].)

[Jawaban] Portable Safety grounds shall be removed in what order to which they are applied? A. Same B. Reverse C. Any arrangement