Weekly Exam 05 - Engineering Sciences

Acceleration toward the center of rotation is

Centripetal force.

The apparent force on a body directed away from the center of rotation is

centrifugal force

The force of the plane reaction in friction calculations is

Normal force

A body at rest on an inclined plane with coefficient of friction μ will not slip until the angle of the plane θ reaches

Tan θ > μ

The force with impending motion of a block on a plane in friction calculations is

Normal force

The physical significance of an infinite magnification factor (resonance) is that amplitude of vibration becomes

infinite

The natural logarithm of the ratio of the amplitude of two successive undamped free oscillations is known as the

Logarithmic decrement

In damped free vibration, when the system returns to its static position with no overshoot past equilibrium, the system is said to be

critically damped

In a critically damped, free vibrational system, the roots of the characteristic equation to the differential equation are

unequal and imaginary.

Impulse is

A vector quantity equal to the change in momentum.

The impulse-momentum principle may be applied in each of the following systems except

determining the work done against friction.

Rolling resistance is due to

deformation of the rolling body and the surface.

Liquids and gases take the following characteristic(s) of their containers.

shape

For computational convenience, fluids are usually classed as

laminar or turbulent.

Which of the following statements about a Newtonian fluid is most accurate?

Shear stress is proportional to rate of strain.

Which of the following is not a characteristic of real fluids?

experience of eddy currents and turbulence

Which of the following is not the mass density of water?

100 kg/m^3

Which of the following is not a characteristic of fluid pressure?

It is a shear stress.

Which of the following statements about gauge pressure is most correct? Gauge pressures are measured relative to

atmospheric pressure.

Gauge pressure and absolute pressure differ from each other by

atmospheric pressure.

Each of the following are correct values of standard atmospheric pressure except

1013 mm Hg.

When a pump is operating at a vacuum of 4 in Hg, which of the following is not correct?

The pressure is 158.4 torr

All of the following are properties of an ideal gas except

viscosity.

Which of the following is not the universal gas constant?

8314 kJ/kmol K

The following are all commonly quoted values of standard temperature and pressure except

0°F and 29.92 in Hg.

Kinematic and dynamic viscosity vary from each other only by a factor equal to the

fluid density.

All of the following dimensionless parameters are applicable to fluid flow problems except the

Biot number.

Compressibility of a fluid relates the fractional change in fluid volume per unit change in fluid

pressure.

The speed of sound in a fluid is most closely related to all of the following properties except

thermal conductivity.

The term subsonic flow refers to a flowing gas with a speed

less than the local speed of sound.