Download WGU BIOCHEMISTRY OA ACTUAL EXAM PAPER 2026 QUESTIONS WITH ANSWERS GRADED A+ and more Exams Electrical Engineering in PDF only on Docsity!
WGU BIOCHEMISTRY OA ACTUAL
EXAM PAPER 2026 QUESTIONS WITH
ANSWERS GRADED A+
◍ What is the time constant for a circuit with 150KOhms and a 2 microfarad capacitor?. Answer: .3 seconds ◍ What must be done before checking pump drive belts on a hydraulic elevator. Answer: Pull the main disconnect switch ◍ Which of the following best describes the danger posed be the counterweight assembly when you are riding the car top?. Answer: It run close by in the opposite direction ◍ Why must you place a hydraulic elevator car on jack posts before servicing the packing head?. Answer: Because a hydraulic elevator is supported by a column of oil. ◍ Why can't Elevator Constructors use a metal ladder?. Answer: Metal ladders conduct electricity ◍ Glycine (Gly/G/ Nonpolar)*. Answer: nan ◍ What is the function of a Ground Fault Circuit Interrupter?. Answer: To detect and imbalance in current between the hot and nuetral wires ◍ How do you determine the correct angle from the vertical for placing a ladder. Answer: Measure out a distance of 1/4 the height.
◍ Alanine (Ala/A/Nonpolar). Answer: nan
◍ Who is required to furnish you the necessary safety equipment?. Answer: Your employer
◍ Valine (Val/V/nonpolar). Answer: nan
◍ Leucine (Leu/L/Nonpolar). Answer: nan
◍ Isoleucine (Ile/I/nonpolar). Answer: nan
◍ What device must be in working condition in order to use an elevator car sling as a running platform. Answer: The governor and safeties.
◍ What hazardous condition can occur if the weight of the temporary car and counterweight are not kept nearly equal?. Answer: Traction could be lost
◍ What is the name of the document that lists the hazards of a substance?. Answer: Material Safety Data Sheet or Safety Data Sheet
◍ Who is responsible for making sure barricades are kept in place?. Answer: Everyone on the job
◍ Who is primarily responsible for your safety on the job?. Answer: You, Yourself
◍ Methionine (Met/M/nonpolar). Answer: nan
◍ Tryptophan (Trp/W/nonpolar). Answer: nan
◍ Which agency guarantees your right to a safe workplace?.
◍ Glutamine (Gln/Q/Polar). Answer: nan
◍ When a roller bearing needs to be pressed onto a shaft, what type of allowance does the shaft have?. Answer: Negative allowance
◍ What is the tolerance accepted in the elevator industry?. Answer: +- 1/
◍ Best Describe Layout Drawings. Answer: A mechanical drawing showing plans and elevation views of the elevator installation
◍ Aspartic Acid (Asp/D/negative). Answer: nan
◍ Glutamic Acid (Glu/E/Negative). Answer: nan
◍ What document provides information on the number of doors for an installation and their color?. Answer: Job Abstract
◍ What is the purpose of the elevation view found in the final layouts?. Answer: To show vertical locations and dimensions of elevator components.
◍ The floor heights for the Wilton Towers are as follows; sub-basement- 10'2"; subbasement to basement-12'5"; basement to lobby-22'8"; lobby to the 11th floor-120'5"; and to the executive floor-16'5". What is the total travel for an elevator that travels from ht ebasement floor level to the executive floor level?. Answer: 159' 5"
◍ You have been tasked with unloading 177 boxes from the company truck and moving them into a storage area. By noon you have moved 103 boxes. What percentage of the load has been moved?. Answer: 58%
◍ Lysine (Lys/K/Positive). Answer: nan
◍ Arginine (Arg/R/Positive). Answer: nan
◍ Histidine (His/H/Positive). Answer: nan
◍ The counterweight must weigh 40% of the car capacity plus the weight of the assembled car. If the assembled car weighs 3800 lbs. and has a capacity of 2500lbs. what must the counterweight weigh?. Answer: 5100lbs
◍ What is the most important piece of equipment you have when using a power saw?. Answer: Safety Glasses
◍ When using a circular saw.... Answer: The base is not adjustable for cutting depth.
◍ What functions can load weighing transducer perform. Answer: Adjust door times, bypass hall calls, and adjust motor control
◍ What prevents manila rope from unraveling?. Answer: Whipping
◍ When using U-bolts.... Answer: Place all U-bolt clips with the U shaped portion bearing on the dead-end of the rope
◍ Capstans should be. Answer: fastened to building steel or other building structure.
◍ To interrupt hoisting on a capstan.... Answer: ease off on the pulling rope
◍ What type of wrench is used to align the holes for rail installation?. Answer: Spud Wrench
and the rails?. Answer: Rail Brackets
◍ You are responsible for storing 64 standard 15lb T rails on one of the floors of a highrise building. What is the total weight it will put on the floor where it will be stored?. Answer: 15,360lbs
◍ You are on a T-rail job and have been told to stagger them. What should be done?. Answer: One side of the installed rail job has the groove up, while the other side has the tongue up.
◍ If the distanve between the face of the two T-rail brckets (DBB) is 8' 11" what is the back to back guide distance?. Answer: 8' 10 1/2"
◍ When laying out the rail locations for a bank of elevators,.... Answer: Use the column lines to locate the two outermost rails in the bank
◍ If a two-speed AC Motor having a ratio 8:1 has a rated speed of 225FP M. , what is the leveling speed?. Answer: 28 fpm
◍ The symbol E is used to represent what?. Answer: Voltage
◍ Two negative charges placed next to each other will.... Answer: Repel each other
◍ One ampere equals ____. Answer: 1,000 mA
◍ The difference of electrical potential between two points is called.... Answer: Voltage
◍ What is equivalent to 35 microamps?. Answer: .000035 amperes
◍ What happens to the total resistance in a wire if its length is doubled?. Answer: The resistance is doubled
◍ What happens to the total resistance in a wire if its cross sectional area is increased by four times?. Answer: The resistance is one fourth of what it was originally.
◍ solve:-863 x -1224. Answer: +1,056,
◍ Calculate the resistance in a circuit if the voltage is 24 VDC and 40 watts of power are consumed.. Answer: 14.4 Ohms
◍ How should ohmmeters be used to take measurements in a circuit?. Answer: Connected in parallel across the load with one lead of the load to be measured disconnected.
◍ How should voltmeters be used to take measurements in a circuit?. Answer: Connected in parallel across the load to be measured disconnected
◍ What will happen to the current of a constant voltage if the resistance is doubled?. Answer: The current will be halved
◍ Calculate the voltage in a circuit with 87 ohms of resistance and. amperes of current flowing in it.. Answer: 19.
◍ If the current is 120mA and the voltage is 245 VDC, what is the amount of power consumed by this circuit?. Answer: 29.4 Watts
◍ If a circuit is rated to use 1478 Watts and the source voltage is 68 volts, what is the resistance in the circuit?. Answer: 21.74 amps
◍ What does the designation DPDTNO switch represent?. Answer: Double Pole- Double Throw- Normal Open Switch
◍ Current flows from left to right on a conductor, what is true of the magnetic lines of force?. Answer: The magnetic lines of force will be in the counterclockwise direction.
◍ ____ measures current in a circuit without disconnecting wires.. Answer: Clamp-on meter
◍ The moveable portion of a relay is referred to as the ____. Answer: Armature
◍ The period of a sine wave is .0083 seconds. What is the frequency?. Answer: 120 Hz f= 1/t
◍ With an effective value of 20.2 amps of AC current, what is the peak value. Answer: 28.
◍ A waveform that has unequal rise and fall times with one being instantaneous is called a. Answer: Sawtooth
◍ Like Magnetic Poles. Answer: Repel
◍ Total Resistance is.... Answer: always less than the resistance of any one branch.
◍ Current in a parallel circuit. Answer: Is shared between branchesI= E/R for each branch.
◍ What stays the same throughout a series circuit. Answer: Current
◍ In a Wye Stator connection.... Answer: There is a neutral or common for all three phases.
◍ When using a portable working platform during rail installation.... Answer: The hoisting cable and operational controls should be inspected daily prior to using the working platform
◍ When laying out the rail locations for a bank of elevators.... Answer: use the column line to locate the two outermost rails in the bank.
◍ When installing formed guide rails.... Answer: the brackets do not require any shim
◍ What must you do when hoisting rails?. Answer: Ensure that your rope block or well wheel has an operational safety latch
◍ What is a bayonet gauge used for?. Answer: to check DBG on a T-rail install.
◍ What is the best fire extinguisher to cover all types of fires in the machine room?. Answer: ABC
◍ What is the main function of the car overspeed governor?. Answer: Grips the rope which mechanically trips the car safety.
◍ Electrical safeties must trip at ___ of mechanical tripping speed for cars that travel above 150 to 500fpm. Answer: 90%
◍ The jaw side of the governor must be plumb to the.... Answer: Releasing carrier of the car.overspeed down condition
◍ Governors must be tested. Answer: every 5 years with rated load at rated speed in the down direction
◍ Group Controllers. Answer: coordinate the movement of multiple cars.
◍ If a gearless machines drive sheave has a circumferance of 6 feet, approximately how many RPMs would be required of the drive motor to run 800fpm. Answer: 133
◍ On a geared worm machine, where must the oil level be kept?.
◍ Which lay of wire rope has the strand wires in line with the rope axis?. Answer: Regular Lay
◍ At what speed should counterweight safeties be set to trip?. Answer: UP TO 10% higher than the car governor
◍ What type of safety uses an oil buffer btween the car and safety planks?. Answer: Type C
◍ If you have a 3500lb car rated at 4000lbs capacity, how much should the counterweight assembly weigh for a normal 40% install?. Answer: 5100lbs
◍ When an occupiable space below the pit, what additional equipment is required on the counterweight?. Answer: Safeties
◍ What functions can load weighing transducers perform?. Answer: Adjust door times, bypass hall calls, and adjust motor control.
◍ How high would you block up a counterweight frame before roping that had a counterweight buffer height of 32", rope stretch of 12"; bottom counterweight run by of 18"; and pit depth of 8 feet?. Answer: 62 inches
◍ What document may be the only place to look for information such as the type of fixtures, car panel, fire service floor, etc?. Answer: Job abstract
◍ Which type of diagram shows the simplified path from positive to negative for all components in a circuit. Answer: Straight Line
◍ What term best describes typing all metal parts at ground potential to minimize electrical shock hazards?. Answer: Bonding
◍ When bending conduit, what is the maximum number of degrees of bend
allowed between access points?. Answer: 360 degrees
◍ You are working with motor-gengerator leads. WHat is the maximum length that may be connected directly to the controller without being run inside a raceway?. Answer: 6 feet
◍ What is the regerence point on the thinwall bender for the finish line of a back to back bend?. Answer: The start point
◍ You have a 10' length of 3/4" rigid conduit, which needs to have a 90 degree bend with a 16" stub height. With a 7" take up, what is the distance from the end of the pipe to the mark where the hickey arrow is aligned?. Answer: 9"
◍ What color insulation s used to indicate a ground wire?. Answer: Green
◍ What type of core would be used in traveling cable over 200ft long?. Answer: Steel
◍ Why are new traveling cables allowed to hang free for a time?. Answer: To relieve torsional stress
◍ What do cable grippers depend on to grip the cable tight?. Answer: Tension
◍ On a two or three stop elevator, how will the traveling cables probably be suspended?. Answer: On spools
◍ When using a hoisting line to install cables, what device could be used to prevent twisting?. Answer: Swivel LInk
◍ Where must high rise traveling cables be anchored?. Answer: Building structure
◍ What are the two most common functions of load weighing?. Answer: To (a) control the generator field, and (b) initiate express operation
◍ How should AC incandescent lamp sockets be connected?. Answer: Connect the hot lead to the center terminal, and the grounded conductor to the shell
◍ What safety device is required with automatically closing, vertical sliding freight elevator doors?. Answer: A warning bell
◍ What is the minimum amount of spare wires that you should pull to the car or controller?. Answer: 10%
◍ When more than one screw is used as a terminal, how are the screws connected?. Answer: With a shorting bar
◍ What type of solder must be used on electrical wires?. Answer: Rosin core
◍ What is required if the strain wire is to be used as a ground?. Answer: Insulated covering
◍ If a car is used as a running platform without the cab, what portion of the total counterweight fillers should be installed?. Answer: Slightly more than needed to achieve balance
◍ Why is loss of rope traction hazardous?. Answer: You will lose control of the elevator
◍ What is the function of the compensation sheave switch?. Answer: It opens if the sheave moves up or down beyond limits
◍ What switches and/or push buttons are required in a temporary operating station?. Answer: UP, DOWN, RUN and STOP
◍ Why is it important to verify the main electrical supply voltage is correct?. Answer: The wrong voltage could damage the controller
◍ What is the purpose of the suicide circuit?. Answer: It prevents generator voltage buildup
◍ If the DC output of a three phase rectifier is lower than specified, what would be the most likely cause?. Answer: One input phase is missing
◍ At what point is the main motor field voltage highest?. Answer: When the elevator is leveling
◍ If the generator is rotating and you apply voltage to the field but no armature voltage is produced, what is most likely wrong?. Answer: The generator field is open
◍ Once an SCR is gated, how long does it continue to conduct?. Answer: Until the AC sine wave passes through zero
◍ How do you determine the hand of the car (left and right). Answer: Stand on the car platform and look out the hallway. Observe the direction that the door panel will open.
◍ Center-opening, horizontal sliding door.... Answer: Distance from the door face to the hoist way side of the sill shall not exceed 2 1/4"
◍ What type of material is required for vision panels on swing doors?. Answer: Laminated glass
◍ When truckable sills are installed on freight door entrances.... Answer: The sill must be capable of carrying the load capacity of the platform
◍ When the setting sills in compliance with the AMSE rules, what is the minimum clearance allowed between the platform sill and the hoist way sill?. Answer: 1/2"
The floor area is 9sqft and the rated capacity is 10.5lbs/ft3. What is the capacity of this dumbwaiter?. Answer: 378lbs
◍ Combination mechanical locks and electric contacts are installed on hand and power operated dumbwaiters that you are servicing. To ensure the doors are locked when the car leaves the floor, what adjustments are required?. Answer: Lock the doors when the car is no more than 3 inches from the floor
◍ What is the requirement for using hoist way access switches on dumbwaiters?. Answer: They are required at the terminal landings when the rise is 25' or greater
◍ How should you install the dumbwaiter car after all of the entrances are in place?. Answer: Because one door frame is larger than the rest, you don't need to take any additional steps to install the car
◍ When making final adjustments to a dumbwaiter hoist way door, where should you be positioned to accomplish this task?. Answer: Partially in the hoist way, with power off
◍ Class A loading freight elevator loads must be loaded.... Answer: Manually loaded on and off.
◍ What is the name of the scientific principle that allows for operation of a hydraulic elevator?. Answer: Pascal's Law
◍ When calcuating hydraulic system pressure, the force is expressed in pounds and the area of the plunger is measured in square inches. How is pressure expressed?. Answer: In pounds per square inch
◍ If a gauge is used to measure system pressure with the elevator at rest and
the size of the plunger is known, how can the total weight of the elevator be calculated?. Answer: Multiply pressure times area
◍ How many cubic inches are there in one gallon?. Answer: 231
◍ What is the area of a 6" plunger. Answer: 28.27 square inches
◍ A weight (force) of 5000lbs is placed on a hydraulic plunger having an area of 25 square inces. WHat is the system pressure?. Answer: 200 psi
◍ How many gallons of oil will be needed to raise a 4" plunger 25 feet?. Answer: 16.3 gallons
◍ How is a hydraulic elevator rated?. Answer: Speed and Capacity
◍ When a hydraulic elevator is at rest at floor level, which valve is open?. Answer: Up valve
◍ What is another term for up slowdown?. Answer: Up transition
◍ Why is a check valve required?. Answer: To prevent oil from flowing from the jack to the reservoir
◍ What determines the full speed of a hydraulic elevator?. Answer: Rate of flow in GPM
◍ What is the definition of "working pressure". Answer: Full load up pressure
◍ What two functions are combined in a single valve?. Answer: Up start bypass and relief valve
◍ To perform a relief test, you must put the plunger on the stop ring. In addition, which circuits must be jumped out?.
