Multiple Choice Questions (MCQ) on Electronics and Communication Engineering

36-Compandor, in digital communication refers to:

(A) Compressor

(B) Expander

(C) Both (A) and (B)

(D) None of the above

 

37-Magnitude of the signal formed by Q and I represent:

(A) Hue

(B) Brightness

(C) Contrast

(D) Color Saturation

 

38-JPEG 2000 standard uses:

(A) DCT transformation

(B) Hilbert transformation

(C) Wavelet transformation

(D) DST transformation

 

39-Numerical aperture for a multimode fiber is in the range of

(A) 0 to 0.1

(B) 0.1 to 0.2

(C) 0.2 to 0.3

(D) 0.3 to 0.4

 

40-Select the correct statement for 8051 hardware

(A) CPU 8 Bit, PC 16 Bit, DPTR 8 Bit, PSW 16 Bit, SP 16 Bit

(B) CPU 8 Bit, PC 8 Bit, DPTR 16 Bit, PSW 16 Bit, SP 8 Bit

(C) CPU 8 Bit, PC 16 Bit, DPTR 8 Bit, PSW 8 Bit, SP 16 Bit

(D) CPU 8 Bit, PC 16 Bit, DPTR 16 Bit, PSW 8 Bit, SP 8 Bit

 

41-The ADC0804 has ______ resolution.

(A) 32 bit

(B) 16 bit

(C) 8 bit

(D) 4 bit

 

42-AD 670 is a:

(A) Successive approximation ADC

(B) Dual slope ADC

(C) Counter ramp ADC

(D) Flash ADC

 

43-PWM switching is preferred in voltage source inverters for the purpose of:

(A) Controlling output voltage

(B) Reducing filter size

(C) All the above

(D) None of the above

 

44-Stepper motors are mostly used for:

(A) high power requirements

(B) control system applications

(C) very high speed of operation

(D) very low speed of operation

 

45-The most suitable device for high frequency inversion in SMPS is:

(A) BJT

(B) IGBT

(C) MOSFET

(D) GTO

 

ANSWERS:

36-(C), 37-(D), 38-(A), 39-(A), 40-(D), 41-(C), 42-(A), 43-(A), 44-(D), 45-(C)