Mechanical Engineering Quiz # 1

What aspect of machine virabtion is described in cycles per second?

Regularity

Consistency

Continuity

Frequency

Creep is the tendency of a solid to:

deform permanently under mechanical stress

undergo elastic deformation

fracture under extreme loads

deform due to electromagnetic forces

As related to steam production, what do the letters BHP stand for?

Boiler heat production

Boiler horsepower

Burner heat potential

Burner heat product

Which fan configuration is designed to add energy to airflow passing straight through the fan blades?

Centrifugal fan configuration

Axial fan configuration

High velocity fan configuration

Vortex fan configuration

What must happen to fuel oil at the burner for efficient combustion?

Desintigration

Oxygen depletion

Atomization

Conical spraying

What is the term for the ability of a material to withstand the force of being pulled apart?

Tensile strength

Shear strength

Elasticity

Flexibility

What is a term for heat transfer between two objects in contact, driven by a constant temperature difference?

convection

steady state conduction

constant diffusion

advection

The reduction in effectiveness of a vehicular brake is called:

smooth-out

drag

brake fade

force fade

Which of these processes involves melting the workpieces?

soldering

brazing

welding

What is the lowest stress that produces a permanent deformation in a material?

strain threshhold

fatigue

fracture threshold

Yield strength

Which machine tool rotates the workpiece on its axis?

drill

milling machine

lathe

Which fieldlines are instantaneously tangent to the velocity vector of flow?

timelines

streaklines

streamlines

pathlines

What describes the effect of a material expanding in the directions perpendicular to its direction of compression?

Poisson Effect

Bellowing effect

Newton effect

Accordion effect

What is the density of water?

500 kg/m^3

4000 kg/m^3

1 kg/m^3

1000 kg/m^3

What is an upward force exerted by a fluid that opposes the weight of an immersed object?

buoyancy

capillary action

surface tension

Why are fan assemblies usually designed with spring isolators?

To increase airflow

To eliminate noise

To minimize vibration

To reduce friction

True or False: Vapour compression used in most household refrigerators is a non-cyclic process.

True

False

How is the heat energy that changes the state of an object but not its temperature described?

Superheat

Latent heat

Sensible heat

Thermal heat

What does ASME stand for?

Association for Service of Mechanical Equipment

American Standards for Mechanical Equipment

American Society of Mechanical Engineers

Association of Science and Materials Engineering

What is the rotational force exerted by a spinning shaft?

Radial velocity

Momentum

Inertia

Torque

Which device is used to store rotational energy?

generator

flywheel

motor

Which if these is NOT a component of aerodynamic force?

pinch

drag

thrust

lift

What is the measure of a fluid's resistance to gradual deformation by shear stress or tensile stress?

viscosity

fluidity

buoyancy

fluid tension

What are the units for Reynold's number?

m^3/s

kg/m^3

no dimensions

Pascal second

What is defined as the ratio of tensile stress to tensile strain?

shear modulus

Pascal's ratio

bulk modulus

Young's modulus

Which value must be calculated into piping system designs?

Expansion denominator

Expansion derivative

Expansion estimate

Expansion coefficient

What is the result of continous cyclic loads on a metal object?

Increased pliability

Hardened metal

Metal fatigue

Softened metal

The set of equations used to describe motion?

Kinesetic

Newtonian

Motive

Kinematic

True or False: Silicon can be used to make microelectromechanical systems.

True

False

True or False: A perfect Carnot heat engine cannot be built in reality.

False

True