Engineering
Explore the application of science and math in designing machines, structures, and systems. Engineering includes fields like mechanical, civil, electrical, and software engineering.
Questions Overview
Which of the following forces opposes drag and is created through combustions between fuel and air?
A. Thrust
B. Subsonic
C. Pressure
D. Lift
When should you start to evaluate the effectiveness of a Fall Protection Plan?
A. Anytime a qualified person is available to review it.
B. After the first reported incident.
C. After the first week the plan is in place.
D. As soon as it is put in place.
What methodology is used to determine the best fall protection with the lowest overall risk?
A. Job Hazard Analysis (JHA).
B. Hazard Mitigation Report.
C. Roof Permit System.
D. Controlled Hazard Review.
If R-22 refrigerant was at 132 #, what is the saturation temperature?
A. 66 F
B. 75 F
C. 79 F
D. 90 F
E. 95 F
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A warning line tells you?
Which type of valve is designed to allow fluid to only flow in one direction?
A. Shutoff valve
B. Check valve
C. Relief valve
D. Adjustable flow control valve
Which of the following hydraulic components is used to store hydraulic fluid in a hydraulic system?
A. Actuator
B. Pump
C. Tank
D. Valve
What is a hydraulic schematic?
A. A pictorial view of hydraulic components
B. A standard for hydraulic fittings
C. A graphical representation of a hydraulic system
a) With reference to magnetism define the following terms:
i) Magnetic field
ii) Magnetomotive force
iii) Reluctance
iv) Flux density
v) Permeability
b) A coil of 300 turns is wound uniformly on a ring of non-magnetic material. The ring has a mean circumference of 40 cm and a uniform cross sectional area of [tex]4 cm^2$[/tex]. If the current in the coil is 5 A, calculate
i) The magnetic field strength
ii) The flux density
iii) The total magnetic flux in the ring
c) Calculate the inductance of the coil when a current of 4 A in a coil of 800 turns produces a flux of 5 mWb linking with the coil.
d) Calculate the emf induced in a coil of inductance 12 H by a current changing at the rate of [tex]4 A / s$[/tex].
a) Define the following
i) Impedance
ii) Inductive reactance
b) A Capacitor is connected in series with a [tex]40 \Omega$[/tex] resistor across a supply of frequency 60 Hz. A current of 3 A flows and the circuit impedance is [tex]50 \Omega$[/tex]. Calculate
i) the value of the capacitance
ii) the supply voltage
iii) the phase angle between supply voltage and current
iv) the p.d. across the resistor
Which of the following is not typically shown on a hydraulic schematic?
A. Hydraulic lines
B. Valves
C. Hydraulic tank
D. Fittings
Which type of pump allows the amount of fluid pumped per revolution of the pump's input shaft to be varied while the pump is running?
A. Bidirectional
B. Unidirectional
C. Variable-displacement
D. Fixed-displacement
On a schematic, valves are usually shown in their
deactivated state.
A. True
B. False
Multiple hydraulic tank symbols on a schematic indicate that
A. True
B. False
Which of the following statements is true about barricades?
A. Barricades may be placed closer than the limited approach boundary.
B. Barricades cannot be placed closer than the limited approach boundary.
C. Barricades may never be placed closer than the arc flash boundary.
D. Barricades must be placed at every boundary for all work on energized equipment.
What is the most effective method specified in the hierarchy of risk control?
A. Substitution
B. Engineering controls
C. Administrative controls
D. Elimination
create a method statement for all construction work in instant dream home series season 1 episode 1
- True or False: Class E hard hats protect you from low-voltage electrical hazards as well as impact.
- True or False: To properly wear a hard hat, make sure there's space between the top of your head and the inside shell.
- True or False: Make sure to always paint your name on your hard hat for easy identification.
- True or False: Knives cause the most injuries to hands.
- True or False: When necessary use electrical gloves rated one class higher than you need, never lower.
- True or False: Always select footwear with the compression and impact rating equal to or below the pounds of pressure your feet may experience.
- True or False: Work shoes and boots are for long-term situations around
E.g. A modulating signal [tex]$10 \sin \left(2 \pi \times 10^3 t\right)$[/tex] is used to modulate a carrier signal [tex]$20 \sin \left(2 \pi \times 10^4 t\right)$[/tex]. Find the modulation index, percentage modulation, frequencies of the sidebands and their amplitudes. What will be the bandwidth of the modulated signal?
True or False: To properly wear a hard hat, make sure there's space between the top of your head and the inside shell.
Mary is biking downhill. She notices that her shirt and hair begin to pull back on her and blow in the "wind" that she is creating as she moves faster. This "wind" is an example of which of the following forces that also acts on an airplane?
A. Wind-tunnel modeling
B. Gravity
C. Sound waves
D. Drag
As pilots get closer to the speed of sound:
A. the air molecules move out of the way more quickly, which creates a sonic boom.
B. there is not enough thrust to propel the airplane past the sound waves.
C. they notice that the airplane uses less fuel because the pull of gravity decreases.
D. the airplane becomes more difficult to fly because there is more drag from air molecules.
Increasing an airplane's speed or wing size does which of the following?
A. Generates more lifting force
B. Increases the gravitational pull on the plane
C. Decreases the amount of drag acting on the plane
D. Creates a sonic boom
Here, S1 and S2 are the sizes of the two CDs, which should be as close to each other as possible.Optimum solution: To solve the ILP, we can use the branch and bound method. The following is the branch and bound tree for the problem: The optimal solution is obtained when x1,1=1, x2,1=0, x3,1=1, x4,1=0, x5,2=1, x6,2=0, x7,2=0, and x8,2=1, which gives S1=39 and S2=38. Therefore, the used space on each CD is about the same. For more question on binary variable
Which of the following forces opposes drag and is created through combustions between fuel and air?
A. Thrust
B. Subsonic
C. Pressure
D. Lift
A) Thrust
When should you start to evaluate the effectiveness of a Fall Protection Plan?
A. Anytime a qualified person is available to review it.
B. After the first reported incident.
C. After the first week the plan is in place.
D. As soon as it is put in place.
D) As soon as it is put in place.
What methodology is used to determine the best fall protection with the lowest overall risk?
A. Job Hazard Analysis (JHA).
B. Hazard Mitigation Report.
C. Roof Permit System.
D. Controlled Hazard Review.
A) Job Hazard Analysis (JHA).
If R-22 refrigerant was at 132 #, what is the saturation temperature?
A. 66 F
B. 75 F
C. 79 F
D. 90 F
E. 95 F
B. 75 F
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A) Welcome to AmaSlackpackers! Today, we're exploring [destination]. Join us as we uncover hidden gems, local eats, and budget-friendly stays. First stop: [landmark]. Next, we'll try [local dish] at [popular spot]. Don’t miss our tips for saving money while traveling. Subscribe for more adventures!
B) Hey slackpackers! Ready for an epic journey? We’re in [city], starting at [attraction]. Then, we’ll dive into [activity] and taste [signature food]. Plus, we’ll share our top travel hacks. Follow us for more fun!
C) AmaSlackpackers here! Let’s roam [location] together. We’ll visit [must-see place], savor [local specialty], and stay at [affordable accommodation]. Stay tuned for our next adventure!
D) Travel light, explore more with AmaSlackpackers! Today, we’re in [destination], checking out [highlight], eating [famous food], and sharing insider tips. Hit subscribe for more slackpacking guides!
(Note: Replace bracketed items with actual details.)
A warning line tells you?
A) This is the edge of the working surface
Which type of valve is designed to allow fluid to only flow in one direction?
A. Shutoff valve
B. Check valve
C. Relief valve
D. Adjustable flow control valve
B) Check valve
Which of the following hydraulic components is used to store hydraulic fluid in a hydraulic system?
A. Actuator
B. Pump
C. Tank
D. Valve
C) Tank
What is a hydraulic schematic?
A. A pictorial view of hydraulic components
B. A standard for hydraulic fittings
C. A graphical representation of a hydraulic system
C) A graphical representation of a hydraulic system
a) With reference to magnetism define the following terms:
i) Magnetic field
ii) Magnetomotive force
iii) Reluctance
iv) Flux density
v) Permeability
b) A coil of 300 turns is wound uniformly on a ring of non-magnetic material. The ring has a mean circumference of 40 cm and a uniform cross sectional area of [tex]4 cm^2$[/tex]. If the current in the coil is 5 A, calculate
i) The magnetic field strength
ii) The flux density
iii) The total magnetic flux in the ring
c) Calculate the inductance of the coil when a current of 4 A in a coil of 800 turns produces a flux of 5 mWb linking with the coil.
d) Calculate the emf induced in a coil of inductance 12 H by a current changing at the rate of [tex]4 A / s$[/tex].
a) Define the following
i) Impedance
ii) Inductive reactance
b) A Capacitor is connected in series with a [tex]40 \Omega$[/tex] resistor across a supply of frequency 60 Hz. A current of 3 A flows and the circuit impedance is [tex]50 \Omega$[/tex]. Calculate
i) the value of the capacitance
ii) the supply voltage
iii) the phase angle between supply voltage and current
iv) the p.d. across the resistor
a) i) Magnetic field: The region around a magnet where magnetic forces are exerted. ii) Magnetomotive force: The force that drives magnetic flux through a magnetic circuit. iii) Reluctance: The opposition to the establishment of magnetic flux in a magnetic circuit. iv) Flux density: The amount of magnetic flux per unit area. v) Permeability: The measure of a material's ability to support the formation of a magnetic field. b) i) 3750 A/m ii) 0.00471 T iii) 1.884 × 10^-6 Wb c) 1 H d) 48 V a) i) Impedance: The total opposition to current flow in an AC circuit. ii) Inductive reactance: The opposition to current flow caused by inductance in an AC circuit. b) i) 66.31 µF ii) 150 V iii) 36.87° iv) 120 V
Which of the following is not typically shown on a hydraulic schematic?
A. Hydraulic lines
B. Valves
C. Hydraulic tank
D. Fittings
D) Fittings
Which type of pump allows the amount of fluid pumped per revolution of the pump's input shaft to be varied while the pump is running?
A. Bidirectional
B. Unidirectional
C. Variable-displacement
D. Fixed-displacement
C) Variable-displacement
On a schematic, valves are usually shown in their
deactivated state.
A. True
B. False
A. True
Multiple hydraulic tank symbols on a schematic indicate that
A. True
B. False
B. False
Which of the following statements is true about barricades?
A. Barricades may be placed closer than the limited approach boundary.
B. Barricades cannot be placed closer than the limited approach boundary.
C. Barricades may never be placed closer than the arc flash boundary.
D. Barricades must be placed at every boundary for all work on energized equipment.
B) Barricades cannot be placed closer than the limited approach boundary.
What is the most effective method specified in the hierarchy of risk control?
A. Substitution
B. Engineering controls
C. Administrative controls
D. Elimination
D) Elimination
create a method statement for all construction work in instant dream home series season 1 episode 1
A detailed method statement for construction work in Instant Dream Home Series Season 1 Episode 1
- True or False: Class E hard hats protect you from low-voltage electrical hazards as well as impact.
- True or False: To properly wear a hard hat, make sure there's space between the top of your head and the inside shell.
- True or False: Make sure to always paint your name on your hard hat for easy identification.
- True or False: Knives cause the most injuries to hands.
- True or False: When necessary use electrical gloves rated one class higher than you need, never lower.
- True or False: Always select footwear with the compression and impact rating equal to or below the pounds of pressure your feet may experience.
- True or False: Work shoes and boots are for long-term situations around
14) True
15) True
16) False
17) True
18) True
19) False
20) True
E.g. A modulating signal [tex]$10 \sin \left(2 \pi \times 10^3 t\right)$[/tex] is used to modulate a carrier signal [tex]$20 \sin \left(2 \pi \times 10^4 t\right)$[/tex]. Find the modulation index, percentage modulation, frequencies of the sidebands and their amplitudes. What will be the bandwidth of the modulated signal?
A) 0.5, 50%, 9 kHz & 11 kHz, 5V, 2 kHz
True or False: To properly wear a hard hat, make sure there's space between the top of your head and the inside shell.
TRUE
Mary is biking downhill. She notices that her shirt and hair begin to pull back on her and blow in the "wind" that she is creating as she moves faster. This "wind" is an example of which of the following forces that also acts on an airplane?
A. Wind-tunnel modeling
B. Gravity
C. Sound waves
D. Drag
D) Drag
As pilots get closer to the speed of sound:
A. the air molecules move out of the way more quickly, which creates a sonic boom.
B. there is not enough thrust to propel the airplane past the sound waves.
C. they notice that the airplane uses less fuel because the pull of gravity decreases.
D. the airplane becomes more difficult to fly because there is more drag from air molecules.
D) the airplane becomes more difficult to fly because there is more drag from air molecules.
Increasing an airplane's speed or wing size does which of the following?
A. Generates more lifting force
B. Increases the gravitational pull on the plane
C. Decreases the amount of drag acting on the plane
D. Creates a sonic boom
A) Generates more lifting force
Here, S1 and S2 are the sizes of the two CDs, which should be as close to each other as possible.Optimum solution: To solve the ILP, we can use the branch and bound method. The following is the branch and bound tree for the problem: The optimal solution is obtained when x1,1=1, x2,1=0, x3,1=1, x4,1=0, x5,2=1, x6,2=0, x7,2=0, and x8,2=1, which gives S1=39 and S2=38. Therefore, the used space on each CD is about the same. For more question on binary variable
A) S1=39 and S2=38
