1. In which pressure measurement, pressure of two distinct positions are compared?
a) Absolute Pressure Measurement
b) Differential Pressure Measurement
c) Gauge Pressure Measurement
d) Both Absolute and Differential
Explanation: In differential pressure measurement, pressure of two distinct positions are compared. For example, pressure difference calculated by measuring it at different floors of a tall building will give us differential pressure.
2. ______ can be defined as a subtype of differential pressure measurement.
a) Absolute Pressure Measurement
b) Differential Pressure Measurement
c) Gauge Pressure Measurement
d) Both Absolute and Differential
Explanation: Gauge Pressure Measurement is defined as subtype of differential pressure measurement where we compare pressure pressure at any point to the current atmospheric pressure. Gauge Pressure measurement is used in applications like tire pressure of blood pressure measurement.
3. The computer devices and smart phones that have _______ with pressure sensor.
a) Automotive Industry
b) Industrial
c) Aviation
d) Touch screen
Explanation: The computer devices and smart phones that have touch screen display with pressure sensor. Whenever slight pressure is applied on touch screen through a finger, the sensor determines where it has been applied.
4. In which place the pressure sensor is needed for monitoring gases and their partial pressures.
a) Touch screen
b) Automotive Industry
c) Industrial
d) Aviation
Explanation: Pressure sensors are used to monitor gases and their partial pressures in industrial units so that the large chemical reactions take place in precisely controlled environmental conditions.
5. Which axis accelerometer is mostly used in IOT?
a) 2- axis
b) 3- axis
c) 1- axis
d) Combination of all
Explanation: It uses 3-axis accelerometer. It detect orientation, shake, tap, double tap, fall, tilt, motion, positioning, shock or vibration.
6. Accelerometer is the measurement of ________
a) Velocity/time
b) Energy/time
c) Height/time
d) Angle/time
Explanation: Accelerometer is the measurement of the change in velocity or speed divided by time. For example, a car accelerating from a standstill to 60mph in 60 seconds is determined to have an acceleration of 10mph per second(60/6).
7. What is the use of accelerometer in laptops?
a) To rotate the screen
b) To protect hard drives from damage
c) To get the angle on monitor
d) To get the linear acceleration
Explanation: Accelerometer in laptops protect hard drives from damage. If the laptop were to suddenly drop while in use, the accelerometer would detect the sudden free fall and immediately turn off the hard drive to avoid hitting the reading heads into the hard drive platter.
8. Are accelerometer used in cars?
a) True
b) False
Explanation: Accelerometers are likewise used in cars as the industry method way of detecting car crashes and deploying airbags almost instantaneously.
9. How many and what are the parts that are present in the accelerometer sensor?
a) 1, capacitor sensor
b) 3, piezoelectric effect, Analog display, digital display
c) 2, piezoelectric effect and capacitor sensor
d) 2, Capacitor sensor, digital Display
Explanation: The accelerometer consists of many different parts and work in many ways, two of which are piezoelectric effect and the capacitor sensor. The piezoelectric effect is the most common form of accelerometer and uses microscopic crystal structures that become stressed due to accelerative forces.
The capacitance accelerometer senses changes in capacitance between micro structures located next to the device.
10. The BGM160 gyroscope sensor is fitted with ________ interfaces.
a) Only SPI
b) Only I2C
c) SPI and UART
d) SPI and I2C
Explanation: The BGM160 is fitted with digital bi-directional SPI and I2C interfaces for optimum system integration, which require 3.3v operation.