WorksheetsMaster MCAS Review
Total questions: 55
Worksheet time: 2hrs 13mins
Which of the following represents the front view of the spacer block?
Many types of models are used throughout the design process to help engineers create, develop, test, evaluate, and explain solutions.
An automobile company is ready to test a new, full-size, fully operational model. This type of model is called a
mockup
prototype
scaled system
control system
Which of the following conclusions about the piece of equipment can be made from this diagram?
It has two holes
It has two types of material
It has the same length and width
It has strength in compression and tension
During which of the following steps of the engineering design process would an engineer most likely use the Internet?
identifying the problem
constructing a prototype
researching the problem
selecting the best solution
What does W represent in the drawing?
pipelines
a staircase
ceiling tiles
a ventilation duct
Which of the following is an example of an isometric drawing?
Which diagram shows what the right side view of this part would look like on an engineering drawing?
Several college students want to design and build a solar-powered car. They have chosen a design. Which of the following should they do next to follow an engineering design process?
Build a prototype of the car
Sell the design to a car company
Research the demand for solar-powered cars
Use the design to mass-produce solar-powered cars
Concrete is an excellent material for foundations because it has which of the following properties?
high elasticity
high permeability
high tensile strength
high compression strength
Homeowners adding a new bathroom to their house are required by law to get a building permit before work is started. Which statement best describes the purpose of building permits for construction in existing homes?
Building permits provide homeowners with assistance in planning construction.
Building permits ensure that all construction work meets building codes for safety.
Building permits provide construction services to homeowners who are doing their own construction work.
Building permits ensure that the construction project will make the home more appealing to future homeowners.
The total load on a building floor is 60 lb. per sq. ft. The dead load is 40 lb. per sq. ft.
What is the live load on the floor?
20 lb. per sq. ft.
40 lb. per sq. ft.
60 lb. per sq. ft.
100 lb. per sq. ft.
Many new car and truck frames are made of aluminum alloys. Which of the following statements describes an advantage of using aluminum frames in vehicles instead of steel frames?
Aluminum frames have a higher R-value, providing greater strength to vehicles.
Aluminum frames have a higher density, providing greater acceleration to vehicles.
Aluminum frames have a lower weight, resulting in lower fuel consumption in vehicles.
Aluminum frames have a lower conductivity, resulting in slower corrosion rates in vehicles.
Which of the following most likely restricts commercial development within a residential area?
a zoning law
a building code
an EPA regulation
an OSHA regulation
A pickup truck fully loaded with cargo weighs 5000 lb. If the cargo weighs 1000 lb., what is the dead load of the truck?
1000 lb.
4000 lb.
5000 lb.
6000 lb.
The diagram below shows 500 kg of water in a plastic tank on a steel structure. What is the live load of this structure?
305 kg
500 kg
700 kg
805 kg
During which stage of manufacturing a wooden rocking chair are the pieces of the chair fastened together?
assembling
conditioning
finishing
forming
Which of the following would be the most likely result if human workers were replaced by robots in a manufacturing assembly line?
an increase in labor costs
a decrease in productivity
a decrease in initial investment
an increase in product reliability
Which of the following is the best example of a finishing process in manufacturing?
filling a mold
drilling a hole
painting exterior surfaces
assembling multiple components
A remotely controlled robotic arm is used in the cleanup of contaminated areas. Which of the following best describes why robotics rather than humans are used for this task?
to prevent site investigation by OSHA
to minimize expense of safety equipment
to avoid human exposure to hazardous waste
to limit human exposure to poor weather conditions
In the illustration below, a thick sheet of metal is being passed through two large rollers to produce a thinner sheet. Which type of manufacturing process is being used?
casting
forming
molding
separating
Which of the following qualities of a material is most important to consider before the material is sheared?
absorbency
conductivity
luster
thickness
One type of thermostat has a metal base plate that is attached to the surface being heated. As a result, electrical contacts in the thermostat are opened and closed by expansion and contraction. The proper operation of the thermostat depends on heat transfer by which of the following processes?
conduction
convection
radiation
sublimation
A forced hot air system minimizes cold spots within the interior rooms of a house. Which of the following is primarily responsible for the efficient heating by a forced hot air system?
convective heating
geothermal heating
infrared absorption
radiant reflection
Forced hot water is a popular type of home heating system used in the Northeast. Which of the following is the best material to use to release the thermal energy from the system?
ceramic
fiberglass
metal
nylon
One goal of using alternative energy methods is to decrease dependency on fossil fuels. Which of the following statements best explains why dependency on fossil fuels needs to be decreased?
Fossil fuels are flammable.
Fossil fuels are nonrenewable.
Fossil fuels cost a lot of money.
Fossil fuels depend on the weather.
The most likely reason a house is built with large south-facing windows is to reduce the need for which of the following?
attic insulation
energy for heating
energy for cooling
exterior wall insulation
Which of the following is one reason that copper and aluminum are often used to make cookware?
They are good radiators of heat.
They are good convectors of heat.
They are good conductors of heat.
They are good evaporators of heat.
Geothermal systems produce electricity from what energy source?
heat from the Sun
heat from Earth’s interior
mechanical energy from waves
energy from fossil fuels
The drawing below shows part of a room in a house. Which of the following describes how this room is primarily heated?
condensation
conduction
convection
radiation
The illustration below shows two heat lamps being used to keep food warm. In which way does most of the heat from the lamps reach the food?
by conduction
by evaporation
by radiation
by resistance
Some banks use tubes to transport cylindrical canisters between the bank teller and the customer in the drive-through lane. Pressurized air propels the canister from the bank teller to the customer and back.
Which of the following best describes this system?
a hydraulic system using liquids that can be compressed
a hydraulic system using liquids that cannot be compressed
a pneumatic system using gases that can be compressed
a pneumatic system using gases that cannot be compressed
An architect is designing a special fountain for an art museum. A system of copper pipes will be used to supply water to different parts of the fountain.
Which of the following will occur if the architect uses a 45° elbow instead of a 90° elbow in one section of the piping system?
The water will stop flowing through the pipe, causing it to overflow.
The water will flow with less resistance, allowing it to spray farther.
The water will be blocked by air bubbles in the pipe, causing it to build up.
The water will have more turbulent flow, decreasing the flow rate in the elbow.
Many mechanical systems are modeled after natural processes. Which human body function is most like a closed system?
excreting sweat
circulating blood
breathing in oxygen
secreting tears from ducts
What do all pneumatic tools have in common?
They are powered by water.
They are powered by compressed gas.
They are powered by recirculated fluid.
They are powered by supercooled fluid.
A person is using a garden hose to water the plants in his yard. The hose does not have a nozzle. To make the water spray, the person covers part of the hose opening with his thumb, as shown below. The water will have the greatest velocity if the person leaves which percentage of the hose opening uncovered?
10%
25%
50%
80%
Hydraulic pistons are commonly used to hold a load in an exact position. Why might an air-driven piston be an inappropriate tool to use for this purpose?
Air is invisible.
Air is insulating
Air is weightless.
Air is compressible.
Which of the following statements best describes open fluid systems?
Water is the only fluid used in open systems.
Fluids are not recirculated through open systems.
Open systems are used only in hydraulic applications.
Open systems require minimal energy for operation.
In the hydraulic system represented below, piston X has a cross-sectional area of 20 cm2 and piston Y has a cross-sectional area of 10 cm2. How far up will piston Y move if piston X is pushed down a distance of 2 cm?
1 cm
2 cm
4 cm
10 cm
Which of the following pipe fittings has the least resistance to fluid flow?
Which of the following fluids cannot be used in any hydraulic system?
oil
nitrogen gas
a flammable liquid
a water-based substance
Which of the following fluid systems is characterized by the release of fluids?
closed
indoor
open
outdoor
The diagram below shows a water tank and hose that a person will use to water a garden. Gravity causes water to flow through the hose. The person wants to improve the watering system by increasing the velocity with which the water leaves the hose. Which of the following would be the easiest solution to this problem?
increase the diameter of the water tank
decrease the diameter of the water tank
increase the diameter of the hose nozzle
decrease the diameter of the hose nozzle
Which of the following explains why a sprinkler system is considered an open fluid system?
It uses water instead of air.
It allows water to evaporate.
It allows water to leave the system.
It recycles all the water within the system.
The diagram below shows a section of a water pipe. The diameter of the pipe changes along the length of this section. At which two points in the pipe does water travel at approximately the same speed?
points W and Y
points W and Z
points X and Y
points X and Z
A series circuit is shown in the diagram below.
What is the total resistance of the circuit if the current is 2 A?
5.0 Ω
6.6 Ω
15 Ω
60 Ω
The drawing below shows a series circuit. This series circuit operates when the switch is closed. Which of the following is most likely represented by X?
source
ground
transistor
ohmmeter
Which of the following devices most likely operates on alternating current?
a cell phone
a flashlight
a laptop computer
a microwave oven
Which of the following would be most affected if the temperature of a 20 ft. piece of 14-gauge copper wire were increased by 30°C?
the melting point of the wire
the electrical resistance of the wire
the signal processing speed of the wire
the direction of current flow within the wire
The diagram below represents a circuit to a fuel pump in a car. The ignition switch is turned off. This fuel pump may have an internal short circuit. At which two points should an ohmmeter be connected to measure the resistance of the fuel pump?
P and S
Q and P
R and Q
S and R
In an electrical circuit, which of the following has the greatest direct effect on the resistance of a metal conductor?
the temperature of the conductor
the malleability of the conductor
the color of the conductor
the age of the conductor
Which of the following statements accurately describes electrical circuits?
Only AC circuits can transmit electrical energy.
Only DC circuits can transmit electrical energy
Current in AC circuits flows in both directions.
Current in DC circuits flows in both directions.
Which of the following statements describes an advantage of AC electricity over DC electricity?
AC is found in most low voltage operations.
AC is provided as strong, short bursts of electricity.
AC transforms easily to higher or lower voltage levels.
AC travels in one direction, avoiding power supply interruptions
Which of the following statements describes a function of component X when the switch is closed?
Component X turns the circuit on and off
Component X supplies energy to the circuit.
Component X uses a low current to control a higher-current circuit
Component X allows electrical current to flow in only one direction
The voltage across a resistor in a circuit is 6 V and the current is 0.25 A. What is the resistance?
0.04 Ω
1.5 Ω
9 Ω
24 Ω
Which of the following equations should be used to calculate the total resistance, RT, of the circuit?
