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Questions in engineering

[Terjawab] Explain earthing practices on apparatus.

[Terjawab] Which of the following is not a safety measure when working with mechanical motion? A. Allow time for motion to stop B. Use blocking devices to prevent movement C. Wear cut-resistant gloves D. Keep clothing and body clear of area

[Terjawab] What is the primary purpose of electrical construction documents? A. To estimate project costs only B. To show furniture layouts in buildings C. To guide the installation and inspection of electrical systems D. To plan plumbing layouts

[Terjawab] An oil reservoir exists at its bubble-point pressure of (3,000 psia) and temperature of [tex]$\left(160^{\circ} F \right)$[/tex]. The oil has an API gravity of [tex]$\left(42^{\circ}\right)$[/tex] and gas-oil ratio of ([tex]$600 scf / STB$[/tex]). Initial oil formation volume factor is 1.396 bbl/STB. The following additional data are also available: Reservoir area = 640 acres. Average thickness = 10 ft. Connate water saturation = 0.25 Effective porosity = 15%. The OIIP in STB IS: a. 4 MM STB b. 4001.260 M STB c. 400 M STB d. 4 MMM STB

[Terjawab] What added protection may be required if a fixed ladder does not have a cage? A. Fall protection gear B. A spreader bar to increase stability C. A pulley system for raising and lowering the ladder D. A movable fly section to increase the height of the ladder

[Terjawab] 7. If vector [tex]f(x y z)=x y i+y z j+z x k[/tex] what is the directional derivative of vector [tex]f[/tex] at point [tex](1,1,1)[/tex] in the direction of vector [tex]( i + j + k )[/tex] (a) [tex]2 \sqrt{3}[/tex] (b) [tex]2 \sqrt{2}[/tex] (c) [tex]3 \sqrt{2}[/tex] (d) [tex]3 \sqrt{3}[/tex]

[Terjawab] Find the efficiency of a half wave rectifier with [tex]$\frac{r_f}{R_L}=4$[/tex] A. [tex]$1.0125 \%$[/tex] B. [tex]$8.9125 \%$[/tex] C. [tex]$8.10 \%$[/tex] D. [tex]$9.9125 \%$[/tex] E. None of the above.

[Terjawab] Which of the following is typically not found in a complete set of electrical construction documents? A. Electrical floor plans B. Material delivery schedules C. Panel schedules D. Written specifications

[Terjawab] A two-stage heat/one-stage cool thermostat is used for what type of HVAC system? A. Steam boiler B. Gas furnace C. Heat pump D. Air Conditioner

[Terjawab] Which component standard rates motor controllers in HP? A. IEC B. NEMA