Elex Product Design Test Questions - Set 4

1)   Why is the count input of 7217A LED display provided with a Schmitt Trigger Circuit?

a. To prevent multiple triggering with slowly changing input
b. To permit its operation in noisy environment
c. Both a and b
d. None of the above
Answer  Explanation 

ANSWER: Both a and b

Explanation:
No explanation is available for this question!


2)   Which among the following forms a basis of decision construct in the structured programming?

a. SEQUENCE Construct
b. DERIVED Construct
c. REPEAT Construct
d. CHOICE Construct
Answer  Explanation 

ANSWER: CHOICE Construct

Explanation:
No explanation is available for this question!


3)   Which type of Fuzzy front-end element deals with an evolutionary and iterative mechanism progressing from birth to maturation of opportunity into a tangible idea?

a. Opportunity Identification
b. Opportunity Analysis
c. Idea Genesis
d. Idea Selection
Answer  Explanation 

ANSWER: Idea Genesis

Explanation:
No explanation is available for this question!


4)   By which name does the Fuzzy front-end literary renowned as?

a. Phase 0
b. Stage 0
c. Pre-Project Activities
d. All of the above
Answer  Explanation 

ANSWER: All of the above

Explanation:
No explanation is available for this question!


5)   Decompiler is basically a program which performs translation ________

a. From low level to high level language
b. From high level to low level language
c. Between low level languages
d. Between high level languages
Answer  Explanation 

ANSWER: From low level to high level language

Explanation:
No explanation is available for this question!


6)   Which among the following assists in obtaining the desired value of wave impedance in reflection phase while designing digital PCBs?

A. Width of signal lines
B. Distance between signal line and ground line
C. Signal Delays
D. Double Pulsing


a. A & B
b. B & C
c. C & D
d. A, B, C, D
Answer  Explanation 

ANSWER: A & B

Explanation:
No explanation is available for this question!


7)   Which among the below mentioned assertions is not a way of cross-talk reduction while designing digital PCBs?

a. Decrease in the distance between conductors
b. Shielding of clock lines with guard strips
c. Reduction in the loop area of circuits
d. Avoid running of parallel traces for longer distances especially for asynchronous signals
Answer  Explanation 

ANSWER: Decrease in the distance between conductors

Explanation:
No explanation is available for this question!


8)   Which among the below stated devices/equipments are preferred for elimination of ground and supply line noise especially in TTL/CMOS / ECL PCB designing?

a. Coupling capacitor
b. Decoupling capacitor
c. Snubber circuits
d. All of the above
Answer  Explanation 

ANSWER: Decoupling capacitor

Explanation:
No explanation is available for this question!


9)   Which among the below specified assertions is not a grounding consideration associated with ADC as well as DAC?

a. Analog side to analog ground
b. Digital side to digital ground
c. Use of separate power supply and connection of their ground leads to single point reference
d. Reduction of inductive loop area between power and return traces
Answer  Explanation 

ANSWER: Reduction of inductive loop area between power and return traces

Explanation:
No explanation is available for this question!


10)   Which phenomenon is not reduced by the circuit paths of lowest impedances especially provided by power and return planes for shielding purposes?

a. Radiation
b. Convection
c. Noise
d. Crosstalk
Answer  Explanation 

ANSWER: Convection

Explanation:
No explanation is available for this question!


11)   What is/are the necessity/ies to provide guarding to precision differential amplifiers?

a. To increase leakage resistance
b. To reduce capacitance between signal conductors & ground
c. Both a and b
d. None of the above
Answer  Explanation 

ANSWER: Both a and b

Explanation:
No explanation is available for this question!


12)   Which among the below specified SINAD measurements indicates an ability of receiver for the demodulation of desired signal in the presence of strong interfering signal at the neighboring RF channel?

a. Reference Sensitivity
b. Adjacent Channel Rejection
c. Receiver Intermodulation
d. None of the above
Answer  Explanation 

ANSWER: Adjacent Channel Rejection

Explanation:
No explanation is available for this question!


13)   What should be the value of SINAD, if noise power, distortion power and the signal power are 11 dB, 10 dB and 13 dB respectively?

a. 99 dB
b. 106 dB
c. 120 dB
d. 150 dB
Answer  Explanation 

ANSWER: 106 dB

Explanation:
No explanation is available for this question!


14)   Which among the below specified parameters is not associated with the designing of an optimal symbol set?

a. Channel bandwidth
b. Noise characteristics of channel and receiver
c. Desired Information Rate
d. Transmitter complexity
Answer  Explanation 

ANSWER: Transmitter complexity

Explanation:
No explanation is available for this question!


15)   Which parameters are controlled by parametric or multi-band variable equalizers?

a. Amplitude
b. Center frequency
c. Bandwidth
d. All of the above
Answer  Explanation 

ANSWER: All of the above

Explanation:
No explanation is available for this question!


16)   Radio Fade Margin deals with the expression associated with the availability of margin between __________

a. Strength level of transmitted signal & receiver sensitivity of radio
b. Strength level of received signal & receiver sensitivity of radio
c. Strength level of transmitted signal & transmitter sensitivity
d. Strength level of transmitted signal & received signal
Answer  Explanation 

ANSWER: Strength level of received signal & receiver sensitivity of radio

Explanation:
No explanation is available for this question!


17)   Which among the following components is not used in an over voltage crowbar protection circuit?

a. Resistor
b. Capacitor
c. Inductor
d. SCR
Answer  Explanation 

ANSWER: Inductor

Explanation:
No explanation is available for this question!


18)   What is the operating temperature range of military electronics products?

a. 70°C to 100°C
b. -25°C to 85°C
c. -55°C to 125°C
d. -75°C to 90°C
Answer  Explanation 

ANSWER: -55°C to 125°C

Explanation:
No explanation is available for this question!


19)   Which among the following belongs to the category of logistic support type of requirement?

a. Temperature condition
b. Stress condition
c. Duty Cycle
d. Maintenance testing
Answer  Explanation 

ANSWER: Maintenance testing

Explanation:
No explanation is available for this question!


20)   Which process of product development cycle plays a crucial role in determining the suitability of requirements in accordance to the expected system solution along with the quantitative description?

a. Validation
b. Verification
c. Integration
d. Field Testing
Answer  Explanation 

ANSWER: Validation

Explanation:
No explanation is available for this question!