Elex Product Design Test Questions - Set 1

1)   Which process of design cycle assists in acquiring and fulfilling the functional requirements of a module through the stages of modeling, dynamics and optimization?

a. Functional Analysis
b. Synthesis
c. Evaluation and decision
d. Documentation
Answer  Explanation  Related Ques

ANSWER: Synthesis

Explanation:
No explanation is available for this question!


2)   How is the trade-off specified in the commercial aspect especially in the process of evaluation and decision?

a. By systematic approach of decision
b. By process flowchart trade-off
c. By trade study tree
d. All of the above
Answer  Explanation  Related Ques

ANSWER: All of the above

Explanation:
No explanation is available for this question!


3)   Which type of integration approach allows to add all the components or subsystems in a sequential manner followed by a prescribed set of test?

a. Modular approach
b. Spiral Development Approach
c. Expanding Envelope Approach
d. All of the above
Answer  Explanation  Related Ques

ANSWER: Modular approach

Explanation:
No explanation is available for this question!


4)   Which among the below mentioned illustrations belongs to the category of application specifications of an instrument?

a. Salt spray
b. Bump and vibration level
c. Current and voltage
d. Temperature and humidity
Answer  Explanation  Related Ques

ANSWER: Current and voltage

Explanation:
No explanation is available for this question!


5)   Which defects affect the quality of products by showing the deviations of values from the standard values as per the product specifications?

a. Major defects
b. Minor defects
c. Critical defects
d. None of the above
Answer  Explanation  Related Ques

ANSWER: Minor defects

Explanation:
No explanation is available for this question!


6)   Which among the below mentioned types of vibration testing equipments are applicable / utilized for high frequency range of about 20-1000Hz?

a. Hydraulic
b. Electro-dynamic
c. Both a and b
d. None of the above
Answer  Explanation  Related Ques

ANSWER: Electro-dynamic

Explanation:
No explanation is available for this question!


7)   Which among the following vibrations is/are not associated with sinusoidal testing?

a. Seismic Vibrations
b. Operating Vibrations
c. Duplicate Transportation Vibration
d. All of the above
Answer  Explanation  Related Ques

ANSWER: All of the above

Explanation:
No explanation is available for this question!


8)   An ISO 2247 standard is specially adopted for the vibration testing at_________

a. Fixed low frequency
b. Sinusoidal variable frequency
c. Temperature cycles combined with sinusoidal or random vibrations
d. Combined random vibration wide band
Answer  Explanation  Related Ques

ANSWER: Fixed low frequency

Explanation:
No explanation is available for this question!


9)   Which among the following forms the basis of ultimate standards and are maintained by national calibration laboratories?

a. Primary standards
b. Secondary standards
c. Industry standards
d. None of the above
Answer  Explanation  Related Ques

ANSWER: Primary standards

Explanation:
No explanation is available for this question!


10)   An MCL in the secondary standard represents ____________allowable quantity of a contaminant in drinking water supplied to consumer

a. Maximum
b. Minimum
c. Normal
d. None of the above
Answer  Explanation  Related Ques

ANSWER: Maximum

Explanation:
No explanation is available for this question!


11)   What is the fundamental function/application of standard number or code IP 00  assigned for commercial equipments?

a. Designing of equipments for under water applications
b. Entire sealing of outdoor equipments
c. Assembling of PCB without box
d. Provision of enclosed or sheltered equipments
Answer  Explanation  Related Ques

ANSWER: Assembling of PCB without box

Explanation:
No explanation is available for this question!


12)   Which stage of life-cycle associated with an electronic instrument plays a vital role in establishing a target figure for reliability in terms of specifications?

a. Design
b. Production
c. Storage & Transport
d. Operation
Answer  Explanation  Related Ques

ANSWER: Design

Explanation:
No explanation is available for this question!


13)   Which type of failures occur due to some major reason by terminating the functioning level for a long duration of time?

a. Initial failures
b. Early failures
c. Wear out failures
d. Catastrophic failures
Answer  Explanation  Related Ques

ANSWER: Catastrophic failures

Explanation:
No explanation is available for this question!


14)   According to exponential law of reliability, the relationship between the reliability and the system failure due to consistency in occurrence of failure rate, can be generally expressed as _________

a. R = λt
b. R = -λt
c. R = e λt
d. R = e- λt
Answer  Explanation  Related Ques

ANSWER: R = e- λt

Explanation:
No explanation is available for this question!


15)   Which among the below mentioned parameters is/are associated with the quality of a device?

a. Time & environmental conditions
b. Numerical value
c. Manufacturing of a unit
d. All of the above
Answer  Explanation  Related Ques

ANSWER: Manufacturing of a unit

Explanation:
No explanation is available for this question!


16)   How is the reliability of a product specified?

a. Always less than 1
b. Always greater than 1
c. Always equal to 1
d. None of the above
Answer  Explanation  Related Ques

ANSWER: Always less than 1

Explanation:
No explanation is available for this question!


17)   Internal feedback or compensation in an amplifier usually compensates for ______

a. Overshoot
b. Ring
c. Oscillations
d. All of the above
Answer  Explanation  Related Ques

ANSWER: All of the above

Explanation:
No explanation is available for this question!


18)   Reduction in gain of current feedback amplifiers results in low level of accuracy at _________

a. Low frequencies
b. High frequencies
c. Moderate frequencies
d. Any frequency level
Answer  Explanation  Related Ques

ANSWER: High frequencies

Explanation:
No explanation is available for this question!


19)   The applications provided by CFAs are limited to bipolar transistor because they do not exhibit the necessity of ______

a. Low input impedance
b. High input impedance
c. Both a and b
d. None of the above
Answer  Explanation  Related Ques

ANSWER: High input impedance

Explanation:
No explanation is available for this question!


20)   What does an arrow indicate in the frequency response schematic shown below?

Frequency Response of CFAs.png
a. Direct gain
b. Closed-loop gain
c. Open-loop gain
d. None of the above
Answer  Explanation  Related Ques

ANSWER: Direct gain

Explanation:
No explanation is available for this question!


21)   In μA748 op-amp, the use of 3 pF compensation capacitor also increases the slew rate by the factor of ________

a. 10
b. 15
c. 20
d. 30
Answer  Explanation  Related Ques

ANSWER: 10

Explanation:
No explanation is available for this question!


22)   Which among the following should not be used on clocked elements to perform operational system logistic functions due to high noise susceptibility especially in synchronous design practices?

a. Synchronous Preset & Reset
b. Asynchronous Preset & Reset
c. Both a and b
d. None of the above
Answer  Explanation  Related Ques

ANSWER: Asynchronous Preset & Reset

Explanation:
No explanation is available for this question!


23)   Which form of transition results into an existence of a dynamic hazard in synchronous designing?

a. 0 → 1 → 0 → 1
b. 0 → 0 → 0 → 1
c. 1 → 0 → 0 → 0
d. 1 → 0 → 1 → 0
Answer  Explanation  Related Ques

ANSWER: 1 → 0 → 1 → 0

Explanation:
No explanation is available for this question!


24)   Which among the following controls the frequency of onboard multiplex oscillator in 4-digit ICM 7217A LED display?

a. Resistor
b. Digit Driver
c. Capacitor
d. Segment Decoder
Answer  Explanation  Related Ques

ANSWER: Capacitor

Explanation:
No explanation is available for this question!


25)   Which stage of software designing involves the processes of assembling, compiling, linking and downloading?

a. Program Design
b. Program Coding
c. Software Structure
d. Testing & Debugging
Answer  Explanation  Related Ques

ANSWER: Program Coding

Explanation:
No explanation is available for this question!


26)   Which among the below mentioned assertions is not a module design criteria for dividing problem into small modulus?

a. Number of modules should be unlimited or infinite
b. Decision-making should be restricted to higher level module
c. A single entry and exit point should exist for interfacing with various modules
d. Modules should be compiled separately
Answer  Explanation  Related Ques

ANSWER: Number of modules should be unlimited or infinite

Explanation:
No explanation is available for this question!


27)   Which among the below stated flowchart symbols belongs to the category of control flow diagrams?

a. Process box
b. Program terminator
c. Program flow arrow
d. Off-page connector
Answer  Explanation  Related Ques

ANSWER: Off-page connector

Explanation:
No explanation is available for this question!


28)   What does the word “End do” in a pseudo code imply?

a. End of decision block
b. End of repetition block
c. End of program
d. All of the above
Answer  Explanation  Related Ques

ANSWER: End of repetition block

Explanation:
No explanation is available for this question!


29)   Which terminology of PCB represents a thin photo-sensitive polymer by supporting photographic pattern of single traces or IC pads for etching?

a. Prepreg
b. Etching
c. Photo-resist
d. Solder mask
Answer  Explanation  Related Ques

ANSWER: Photo-resist

Explanation:
No explanation is available for this question!


30)   The actual cost of PCB can be evaluated on the basis of ________

a. PCB size & material
b. Number of layers
c. Vias on PCB
d. All of the above
Answer  Explanation  Related Ques

ANSWER: All of the above

Explanation:
No explanation is available for this question!


31)   Which factors contribute to the occurrence of mechanical stress?

a. Resonance
b. Cracked Solder Joints
c. Both a and b
d. None of the above
Answer  Explanation  Related Ques

ANSWER: Both a and b

Explanation:
No explanation is available for this question!


32)   Which type of PCB requires minimum soldering on component side in order to avoid replacement oriented difficulties?

a. Single-sided PCB
b. Double-sided PCB
c. Both a and b
d. None of the above
Answer  Explanation  Related Ques

ANSWER: Double-sided PCB

Explanation:
No explanation is available for this question!


33)   What should be the resistance of 0.6 mm wide conductor with 15 cm length and 25 μm thickness of standard copper foil? (Assume ρ = 1.7241 x 10-6(at 20° C)

a. 118.2 mΩ
b. 138.2 mΩ
c. 172.4 mΩ
d. 192.4 mΩ
Answer  Explanation  Related Ques

ANSWER: 172.4 mΩ

Explanation:
No explanation is available for this question!


34)   What effects can be observed if the separate power and ground planes are provided with large conducting surfaces for better decoupling in PCB layouts?

a. Increase in self-inductance
b. Reduction in self-inductance
c. Stability in self-inductance
d. None of the above
Answer  Explanation  Related Ques

ANSWER: Reduction in self-inductance

Explanation:
No explanation is available for this question!


35)   Which problems are about to occur if PCB is not designed properly in a confined manner for digital circuits?  

A. Diffraction
B. Refraction
C. Ground & Supply-line Noise
D. Electromagnetic Interference


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

ANSWER: C & D

Explanation:
No explanation is available for this question!


36)   Which among the following  is a terrestrial navigation system that utilizes low frequency radio transmitters and the time interval received from several radio signals in order to determine the position of ship or an aircraft?

a. LORAN
b. Amateur Radio
c. Both a and b
d. None of the above
Answer  Explanation  Related Ques

ANSWER: LORAN

Explanation:
No explanation is available for this question!


37)   Fractional bandwidth basically refers to the bandwidth of device, which gets divided by __________

a. Initial frequency
b. Centre frequency
c. Final or (eventual) frequency
d. None of the above
Answer  Explanation  Related Ques

ANSWER: Centre frequency

Explanation:
No explanation is available for this question!


38)   Free Space Path Loss (FSPL) is proportional to the square of _________

a. The distance between transmitter and receiver
b. The frequency of radio signal
c. Both a and b
d. None of the above
Answer  Explanation  Related Ques

ANSWER: Both a and b

Explanation:
No explanation is available for this question!


39)   Which among the below mentioned assertions is not a reason responsible for the occurrence of fading?

a. Relative motion between transmitter and receiver
b. Variation in the distance of transmitter and receiver
c. Stability (no change) in environmental characteristics of signal path
d. Presence of multiple signal path
Answer  Explanation  Related Ques

ANSWER: Stability (no change) in environmental characteristics of signal path

Explanation:
No explanation is available for this question!


40)   What is the range of SINAD numbers associated with the threshold for reasonable intelligibility of voice especially in SINAD measurement system?

a. 12 dB to 20 dB
b. 22 dB to 30 dB
c. 32 dB to 40 dB
d. 42 dB to 50 dB
Answer  Explanation  Related Ques

ANSWER: 12 dB to 20 dB

Explanation:
No explanation is available for this question!