Top 250+ Solved Mechatronics MCQ Questions Answer
Q. Which command of an LCD is used to shift the entire display to the right?
a. 0x1c
b. 0x18
c. 0x05
d. 0x07
Q. Which command is used to select the 2 lines and 5*7 matrix of an LCD?
a. 0x01
b. 0x06
c. 0x0e
d. 0x38
Q. Which of the following step/s is/are correct for sending data to an LCD?
a. set the r/w bit
b. set the e bit
c. set the rs bit
d. all of the mentioned
Q. Which of the following step/s is/are correct to perform reading operation from an LCD?
a. low to high pulse at e pin
b. r/w pin is set high
c. low to high pulse at e pin & r/w pin is set high
d. none of the mentioned
Q. Which instruction is used to select the first row first column of an LCD?
a. 0x08
b. 0x0c
c. 0x80
d. 0xc0
Q. What is the difference between LM 34 and LM 35 sensors?
a. one is a sensor and the other is a transducer
b. one’s output voltage corresponds to the fahrenheit temperature and the other corresponds to the celsius temperature
c. one is of low precision and the other is of higher precision
d. one requires external calibration and the other doesn’t require it
Q. An electronic device which converts physical quantity or energy from one form to another is called
a. sensor
b. transistor
c. transducer
d. thyristor
Q. What is signal conditioning?
a. to analyse any signal
b. conversion or modification is referred to as conditioning
c. conversion from analog to digital is signal conditioning
d. conversion from digital to analog is signal conditioning
Q. What steps have to be followed for interfacing a sensor to a microcontroller 8051?
a. make the appropriate connections with the controller, adc conversion, analyse the results
b. interface sensor with adc and adc with 8051
c. interface sensor with the max232, send now to microcontroller, analyse the results
d. none of the mentioned
Q. Why Vref is set of ADC0848 to 2.56 V if analog input is connected to the LM35?
a. to set the step size of the sampled input
b. to set the ground for the chip
c. to provide supply to the chip
d. all of the mentioned
Q. A variable reluctance stepper motor is constructed of material with salient poles.
a. paramagnetic
b. ferromagnetic
c. diamagnetic
d. non-magnetic
Q. A stepper motor having a resolution of 300 steps/rev and running at 2400 rpm has a pulse rate of- pps.
a. 4000
b. 8000
c. 6000
d. 10,000