KIG3003 Quiz 1 - Intro

A harmonic motion is a periodic motion

• True

• False

The frequency with which an initially disturbed system vibrates on its own is known as natural frequency

• True

• False

Systems undergo dangerously large oscillations at _____

• harmonics motion

• resonance

• beating

• damped motion

When a system vibrates in a fluid medium, the damping is

• viscous

• Coulomb

• solid

When parts of a vibrating system slide on a dry surface, the damping is

• viscous

• Coulomb

• hysteretic

When the stress-strain curve of the material of a vibrating system exhibits a hysteresis loop, the damping is

• viscous

• Coulomb

• solid

The equivalent spring constant of two parallel springs with stiffnesses $k_1$ and  $k_2$   is 

•  $k_1+k_2$ 

•  $\frac{1}{k_1+k_2}$  

•  $\frac{1}{k_1}+\frac{1}{k_2}$  

The equivalent spring constant of two series springs with stiffnesses $k_1$ and  $k_2$   is 

•  $k_1+k_2$ 

•  $\frac{1}{k_1+k_2}$  

•  $\frac{1}{k_1}+\frac{1}{k_2}$  

The time taken to complete one cycle of motion is called the _____ of vibration

• frequency

• period

• phase angle

• amplitude

The number of cycles per unit time is called the _____ of vibration

• frequency

• period

• phase angle

• amplitude