Answer : C
Explain : IR sensors are now widely used in motion detectors, which are used in building services to switch on lamps or in alarm systems to detect unwelcome guests.
Which of the following is an example of an LDR sensor application ?
Lights
Clock
Voltage Divider
All of above
Answer : D
Explain : Light-dependent resistors (LDRs) are used to detect the presence and intensity of light. They are used in many applications, including: , Automatic lights that switch on and off according to light, Simple smoke detector alarms, Clocks with automatic light, Optical circuit design, Photo proximity switches, Laser-based security systems, Solar street lamps, Camera light meters, Clock radios and Alarm devices etx.
The smallest difference that a sensor can detect is :
Scale
accuracy
Resolution
Precision
Answer : C
Explain : The smallest difference that a sensor can detect is resolution. Resolution is the smallest change that can be detected in the quantity that is being measured. For example, a laser light grid can detect a shift in position. A sensor with a low resolution will only detect or report displacements in whole centimeters.
The process of building IoT hardware and devices enhanced with smart sensors and embedded system using many of the shelf components like sensors, circuits and microcontrollers is called ?
Prototyping
Casting
Protocasting
Protocol typing
Answer : A
Explain : Prototyping is an experimental process where design teams create tangible forms of ideas. Prototypes can be made from paper or digital.
Which instrument is used to measure humidity ?
Hydrometer
Hygrometer
Lactometer
HuMeter
Answer : B
Explain : A hygrometer is an instrument that measures the humidity of air or other gases. It measures the amount of water vapor in the air.
How many registers are there in ARM7 ?
12
30
34
37
Answer : D
Explain : ARM7TDMI has 37 registers (31 GPR and 6 SPR). All these designs use a Von Neumann architecture.
Global Sensor Network is built for ______ ?
Reducing cost and time for development
Reducing cost and increase time for development
Increase cost and increase time for development
Reducing cost and decrease time for development
Answer : A
Hydraulic actuators are classified into ___
linear actuator
rotary actuator
semi-rotary actuator
All of these
Answer : D
Explain : Hydraulic actuators are classified into three types based on actuation: Linear actuators, Rotary actuators and semi-rotary (Telescopic actuators).
How many flags are there in 8085 Microprocessor?
5
9
12
15
Answer : A
Explain : In 8085 microprocessor, the flags register can have a total of eight flags.The 8085 has an 8-bit flag register, but there are only five active flag bits. These are Sign flag, Zero flag, Auxiliary carry flag, Parity flag, Carry flag.
How many terminals does the MQ2 Gas Sensor have?
2
3
4
6
Answer : C
Explain : The MQ2 Gas Sensor has four terminals: , Vcc: Accepts positive voltage to power the sensor, GND: Completes the circuit and activates the sensor, Dout: Provides a digital output terminal, Aout: Provides the analog output terminal.
What will happen if we supply a voltage of 25V to the Vcc of the IR sensor?
Damage is caused
Sensor will work fine
Sensor will not respond for the time the voltage is applied
Sensor will function normally
Answer : A
Explain : Supplying 25V to the Vcc of an IR sensor can cause permanent damage. IR sensors are designed to work with a voltage range of 3.3V to 5V. If the voltage is lower than that, the sensor won't be able to power on.
Which of the following is not an actuator ?
DC Motor
Stepper Motor
Relay
shutter doors
Answer : D
Which of the following is a function of a sensor ?
Separate physical parameters
Activate a response
Track & transfer data to processor
Move a robotic arm
Answer : C
Explain : Sensor just sense the change in physical enviroment and send the data to the processor.
Sensor generates an output signal based on __________
Input
Data
Physical Quantity
None
Answer : A
____________ is an example of 16 bit microcontroller.
8031 Microcontroller
8051 Microcontroller
8096 Microcontroller
None of these
Answer : C
Explain : Examples of most popular 8-bit microcontrollers are Microchip's PIC series, Atmel's AVR series, Intel 8031, Intel 8051, etc. Examples of most popular 16-bit microcontrollers are Intel 8096, Microchip PIC2x, Infineon CX16x series.