Top 50 Instrument and System Design (ISD) Objective Questions and Answers
Top 50 Instrument and System Design (ISD) Objective Questions and Answers
1. What is the operating temperature range of consumer electronics products?
a) 0°C to 70°C
b) -25°C to 85°C
c) -55°C to 125°C
d) -75°C to 90°C
Answer: 0°C to 70°C
2. Which terminology enables the user to develop certain novel features and modify the designs as per the requirement level?
a) Simulation
b) Prototype
c) Product
d) Quality
Answer: Prototype
3. First digit of IP standard shows the degree of protection against
a) Solid object and dust
b) Liquids
c) Mechanical protection
d) Non of these
Answer: Solid object and dust
4. The manufacturing of the product starts after
a) Pilot production batch
b) Environmental testing
c) QA testing
d) Paper Design
Answer: QA testing
5. Which among the below mentioned approaches belongs to the category of In-circuit Testing?
a) Impedance Testing
b) Component Testing
c) Apply Signal and check output
d) All of the these
Answer: All of the these
6. The effects of EMI can be reduced by
a) Suppressing emissions
b) Reducing the efficiency of the coupling path
c) Reducing the susceptibility of the receptor
d) All of these
Answer: All of these
7. The man made noise sources is / are
a) Motors
b) Switches, radio interferences
c) Computers, digital electronics
d) All of these
Answer: All of these
8. In EMC signal, the source delivers maximum power to the input of transmission line when the transmission line input impedance
a) Is equal to the source resistance
b) Greater than the source resistance
c) Smaller than the source resistance
d) None of these
Answer: Greater than the source resistance
9. Generally grounding is provided for:
a) only for the safety of the equipment
b) only for the safety of the operating personnel
c) both (a) and (b)
d) None of these
Answer: both (a) and (b)
10. The purpose of shielding is to control
a) The propagation of electric field only
b) The propagation of magnetic field only
c) The propagation of electric plus magnetic field
d) The propagation of either electric or magnetic field
Answer: The propagation of electric plus magnetic field
11. The multi-point grounding should be avoided at
a) Low frequency
b) High frequency
c) High current
d) Low current
Answer: Low frequency
12. The meaning of “ergonomics” is
a) Human factors
b) Usernomics
c) Ergon” means work and “nomics” means natural
d) All of these
Answer: All of these
13. AD620 is an instrumentation in which gain can be set from
a) 1 to 1000
b) 1 to 10000
c) 10 to 1000
d) 10 to 10000
Answer: 1 to 10000
14. AD595 is an instrumentation amplifier with cold junction compensation used for
a) K-type thermocouple
b) S-type thermocouple
c) J-type thermocouple
d) All of these
Answer: K-type thermocouple
15. XTR-110 accepts inputs of
a) 0 to 7V or 0 to 20V
b) 0 to 5V or 0 to 10V
c) 0 to 7mA or 0 to 20mA
d) 0 to 5mA or 0 to 10mA
Answer: 0 to 5V or 0 to 10V
16. HCNR200/201 is used for
a) Phase angle control
b) High linearity analog opt coupler
c) Low power instrumentation amplifier
d) Thermocouple amplifier with cold junction compensation
Answer: High linearity analog opt coupler
17. TCA 785 is used for
a) Optical Isolation
b) RTD signal conditioning
c) Phase angle control
d) All of above
Answer: Phase angle control
18. AD594/595 is
a) Phase angle control
b) Precision voltage to current converter
c) Low power instrumentation amplifier
d) Thermocouple amplifier with cold junction compensation
Answer: Thermocouple amplifier with cold junction compensation
19. XTR-110 gives the output in terms of
a) 0mA to 20mA
b) 5mA to 25mA
c) 4mA to 20mA
d) All of these
Answer: All of these
20. ICL 7107/06 is
a) Integrated DTMF receiver
b) 3½ Digit, LED display, A?D converter
c) 4 Digit LED display, Programmable Up/Down counter
d) 16-Key, 20- Key Encoder
Answer: 3½ Digit, LED display, A?D converter
21. Which pin assists in transferring the contents of counter into latches under external control in ICM 7217A LED display?
a) EQUAL
b) UP/ DOWN
c) RESET
d) STORE
Answer: STORE
22. MCT-2E opto-coupler uses transmitter receiver pair of
a) LDR and Phototransistor
b) LED and Phototransistor
c) LED and Photodiode
d) LDR and Photodiode
Answer: LED and Phototransistor
23. MM8870D is
a) Integrated DTMF receiver
b) 3½ Digit, LED display, A/D converter
c) 4Digit LED display, Programmable Up/Down counter
d) 16-Key, 20- Key Encoder
Answer: Integrated DTMF receiver
24. MM74C922 is
a) Integrated DTMF receiver
b) 3½ Digit, LED display, A/D converter
c) 4Digit LED display, Programmable Up/Down counter
d) 16-Key, 20- Key Encoder
Answer: 16-Key, 20- Key Encoder
25. Collector current rating of each Darlington pair of ULN2803 is
a) 300mA
b) 500 mA
c) 50mA
d) 600 mA
Answer: 500 mA
26. In ICL7107/06 the analog to digital conversion technique used is
a) Flash Type
b) Singe slope integrating
c) Successive approximation
d) Dual slope integrating
Answer: Dual slope integrating
27. What does CARRY/BORROW generated output indicates in 7217A LED display?
a) Count is zero
b) Count is equal to the value contained in the register
c) Consent to perform direct cascading of counters
d) All of these
Answer: Consent to perform direct cascading of counters
28. ULN2803 finds an application in
a) Relay Driver
b) Stepper Motor Driver
c) D. C. Motor Driver
d) All of these
Answer: All of these
29. MM8870D finds an application in
a) Logic ground isolation
b) Digital Voltmeter
c) Telephone answering machine
d) All of these
Answer: Telephone answering machine
30. Laminate in PCB is made of a/an
a) Insulating base.
b) Conducting base
c) Semi-conductive base
d) Ferrousmaterial base
Answer: Insulating base.
31. Which of the following soldering technique provides an oxide-free surface?
a) Dip soldering.
b) Iron soldering
c) Wave soldering
d) Drag soldering
Answer: Wave soldering
32. Different data information necessary to input in CAD is known as
a) Input data
b) Output data
c) Initial data
d) Final data
Answer: Initial data
33. Reflection in digital circuits will cause
a) Single decay
b) Single rise
c) Single flattened
d) Single delay
Answer: Single delay
34. The power and ground traces kept wide will
a) Increase power to ground voltage
b) Minimize power and ground resistance
c) Minimize power and ground capacitance
d) Decrease power to ground current
Answer: Minimize power and ground resistance
35. To decouple a power suppy pins in digital IC's the capacitor used is
a) Mica
b) Glass
c) Tantalum
d) Polyster
Answer: Tantalum
36. Cross talk problem is more serious for?
a) Analog circuit
b) Digital circuit
c) Single sided PCB
d) Flexible PCB.
Answer: Digital circuit
37. Which of the following scales is only applied where very-high precision is required for Layout design.
a) 1:1
b) 4:1
c) 2:1
d) 3:1
Answer: 4:1
38. Which of the following soldering techniques is used for soldering a number of solder points to be soldering simultaneously?
a) Dip soldering
b) Iron soldering
c) Wave soldering
d) Drag soldering
Answer: Iron soldering
39. In a differential amplifier, the impedance between inputs to Vcc is having
a) High value
b) Low value
c) Variable value
d) Moderate value
Answer: Low value
40. The reliability of product can be improved by
a) Selecting good quality components
b) Reducing the number of components
c) Derating of redundancy
d) All of the these
Answer: All of the these
41. If a product of high reliability is desired, then the MTBF must be
a) Low
b) Moderate
c) High
d) All of the these
Answer: Low
42. What is the failure cost of a product possessing reliability R=1?
a) Zero
b) Unity
c) Infinity
d) None of these
Answer: Zero
43. On which factors does the down-time of an equipment at the maintainability phase, depend?
a) Design
b) Installation
c) Both 1 and 2
d) None of these
Answer: Both 1 and 2
44. Which type of maintenance is associated or concerned with an elimination of failures during the operational level of an equipment?
a) Preventive
b) Predictive
c) Breakdown
d) Capital
Answer: Breakdown
45. How does the burden of legal liabilities get reduced in the process of documentation?
a) By failure modes
b) By operational limits
c) By warning of hazardous operations
d) All of the these
Answer: All of the these
46. The consumer product should satisfy the requirements such as
a) The reliability must be good.
b) The ergonomic and asthetic are prime requirements.
c) It’s cost must be low
d) All of the these
Answer: All of the these
47. MTTF and MTBF are applicable to
a) Only repairable items
b) Repairable and non-repairable items respectively
c) Only non-repairable items
d) Non-repairable and repairable items respectively
Answer: Non-repairable and repairable items respectively
48. The document used to introduce a product is called a/an
a) Proposal
b) Manual
c) Brochure
d) Engineering diary
Answer: Brochure
49. In case of bathtub curve, the failures are divided into.
a) Early failures
b) Random or catastrophic failures
c) Wear-out failures
d) All of the these
Answer: All of the these
50. NEMA-3R standard use to provide an applications in
a) General indoor applications.tion 1
b) Degree of protection against falling rain and sleet
c) Submersible enclosures
d) All of the these
Answer: General indoor applications.tion 1
a) 0°C to 70°C
b) -25°C to 85°C
c) -55°C to 125°C
d) -75°C to 90°C
Answer: 0°C to 70°C
2. Which terminology enables the user to develop certain novel features and modify the designs as per the requirement level?
a) Simulation
b) Prototype
c) Product
d) Quality
Answer: Prototype
3. First digit of IP standard shows the degree of protection against
a) Solid object and dust
b) Liquids
c) Mechanical protection
d) Non of these
Answer: Solid object and dust
4. The manufacturing of the product starts after
a) Pilot production batch
b) Environmental testing
c) QA testing
d) Paper Design
Answer: QA testing
5. Which among the below mentioned approaches belongs to the category of In-circuit Testing?
a) Impedance Testing
b) Component Testing
c) Apply Signal and check output
d) All of the these
Answer: All of the these
6. The effects of EMI can be reduced by
a) Suppressing emissions
b) Reducing the efficiency of the coupling path
c) Reducing the susceptibility of the receptor
d) All of these
Answer: All of these
7. The man made noise sources is / are
a) Motors
b) Switches, radio interferences
c) Computers, digital electronics
d) All of these
Answer: All of these
8. In EMC signal, the source delivers maximum power to the input of transmission line when the transmission line input impedance
a) Is equal to the source resistance
b) Greater than the source resistance
c) Smaller than the source resistance
d) None of these
Answer: Greater than the source resistance
9. Generally grounding is provided for:
a) only for the safety of the equipment
b) only for the safety of the operating personnel
c) both (a) and (b)
d) None of these
Answer: both (a) and (b)
10. The purpose of shielding is to control
a) The propagation of electric field only
b) The propagation of magnetic field only
c) The propagation of electric plus magnetic field
d) The propagation of either electric or magnetic field
Answer: The propagation of electric plus magnetic field
11. The multi-point grounding should be avoided at
a) Low frequency
b) High frequency
c) High current
d) Low current
Answer: Low frequency
12. The meaning of “ergonomics” is
a) Human factors
b) Usernomics
c) Ergon” means work and “nomics” means natural
d) All of these
Answer: All of these
13. AD620 is an instrumentation in which gain can be set from
a) 1 to 1000
b) 1 to 10000
c) 10 to 1000
d) 10 to 10000
Answer: 1 to 10000
14. AD595 is an instrumentation amplifier with cold junction compensation used for
a) K-type thermocouple
b) S-type thermocouple
c) J-type thermocouple
d) All of these
Answer: K-type thermocouple
15. XTR-110 accepts inputs of
a) 0 to 7V or 0 to 20V
b) 0 to 5V or 0 to 10V
c) 0 to 7mA or 0 to 20mA
d) 0 to 5mA or 0 to 10mA
Answer: 0 to 5V or 0 to 10V
16. HCNR200/201 is used for
a) Phase angle control
b) High linearity analog opt coupler
c) Low power instrumentation amplifier
d) Thermocouple amplifier with cold junction compensation
Answer: High linearity analog opt coupler
17. TCA 785 is used for
a) Optical Isolation
b) RTD signal conditioning
c) Phase angle control
d) All of above
Answer: Phase angle control
18. AD594/595 is
a) Phase angle control
b) Precision voltage to current converter
c) Low power instrumentation amplifier
d) Thermocouple amplifier with cold junction compensation
Answer: Thermocouple amplifier with cold junction compensation
19. XTR-110 gives the output in terms of
a) 0mA to 20mA
b) 5mA to 25mA
c) 4mA to 20mA
d) All of these
Answer: All of these
20. ICL 7107/06 is
a) Integrated DTMF receiver
b) 3½ Digit, LED display, A?D converter
c) 4 Digit LED display, Programmable Up/Down counter
d) 16-Key, 20- Key Encoder
Answer: 3½ Digit, LED display, A?D converter
21. Which pin assists in transferring the contents of counter into latches under external control in ICM 7217A LED display?
a) EQUAL
b) UP/ DOWN
c) RESET
d) STORE
Answer: STORE
22. MCT-2E opto-coupler uses transmitter receiver pair of
a) LDR and Phototransistor
b) LED and Phototransistor
c) LED and Photodiode
d) LDR and Photodiode
Answer: LED and Phototransistor
23. MM8870D is
a) Integrated DTMF receiver
b) 3½ Digit, LED display, A/D converter
c) 4Digit LED display, Programmable Up/Down counter
d) 16-Key, 20- Key Encoder
Answer: Integrated DTMF receiver
24. MM74C922 is
a) Integrated DTMF receiver
b) 3½ Digit, LED display, A/D converter
c) 4Digit LED display, Programmable Up/Down counter
d) 16-Key, 20- Key Encoder
Answer: 16-Key, 20- Key Encoder
25. Collector current rating of each Darlington pair of ULN2803 is
a) 300mA
b) 500 mA
c) 50mA
d) 600 mA
Answer: 500 mA
26. In ICL7107/06 the analog to digital conversion technique used is
a) Flash Type
b) Singe slope integrating
c) Successive approximation
d) Dual slope integrating
Answer: Dual slope integrating
27. What does CARRY/BORROW generated output indicates in 7217A LED display?
a) Count is zero
b) Count is equal to the value contained in the register
c) Consent to perform direct cascading of counters
d) All of these
Answer: Consent to perform direct cascading of counters
28. ULN2803 finds an application in
a) Relay Driver
b) Stepper Motor Driver
c) D. C. Motor Driver
d) All of these
Answer: All of these
29. MM8870D finds an application in
a) Logic ground isolation
b) Digital Voltmeter
c) Telephone answering machine
d) All of these
Answer: Telephone answering machine
30. Laminate in PCB is made of a/an
a) Insulating base.
b) Conducting base
c) Semi-conductive base
d) Ferrousmaterial base
Answer: Insulating base.
31. Which of the following soldering technique provides an oxide-free surface?
a) Dip soldering.
b) Iron soldering
c) Wave soldering
d) Drag soldering
Answer: Wave soldering
32. Different data information necessary to input in CAD is known as
a) Input data
b) Output data
c) Initial data
d) Final data
Answer: Initial data
33. Reflection in digital circuits will cause
a) Single decay
b) Single rise
c) Single flattened
d) Single delay
Answer: Single delay
34. The power and ground traces kept wide will
a) Increase power to ground voltage
b) Minimize power and ground resistance
c) Minimize power and ground capacitance
d) Decrease power to ground current
Answer: Minimize power and ground resistance
35. To decouple a power suppy pins in digital IC's the capacitor used is
a) Mica
b) Glass
c) Tantalum
d) Polyster
Answer: Tantalum
36. Cross talk problem is more serious for?
a) Analog circuit
b) Digital circuit
c) Single sided PCB
d) Flexible PCB.
Answer: Digital circuit
37. Which of the following scales is only applied where very-high precision is required for Layout design.
a) 1:1
b) 4:1
c) 2:1
d) 3:1
Answer: 4:1
38. Which of the following soldering techniques is used for soldering a number of solder points to be soldering simultaneously?
a) Dip soldering
b) Iron soldering
c) Wave soldering
d) Drag soldering
Answer: Iron soldering
39. In a differential amplifier, the impedance between inputs to Vcc is having
a) High value
b) Low value
c) Variable value
d) Moderate value
Answer: Low value
40. The reliability of product can be improved by
a) Selecting good quality components
b) Reducing the number of components
c) Derating of redundancy
d) All of the these
Answer: All of the these
41. If a product of high reliability is desired, then the MTBF must be
a) Low
b) Moderate
c) High
d) All of the these
Answer: Low
42. What is the failure cost of a product possessing reliability R=1?
a) Zero
b) Unity
c) Infinity
d) None of these
Answer: Zero
43. On which factors does the down-time of an equipment at the maintainability phase, depend?
a) Design
b) Installation
c) Both 1 and 2
d) None of these
Answer: Both 1 and 2
44. Which type of maintenance is associated or concerned with an elimination of failures during the operational level of an equipment?
a) Preventive
b) Predictive
c) Breakdown
d) Capital
Answer: Breakdown
45. How does the burden of legal liabilities get reduced in the process of documentation?
a) By failure modes
b) By operational limits
c) By warning of hazardous operations
d) All of the these
Answer: All of the these
46. The consumer product should satisfy the requirements such as
a) The reliability must be good.
b) The ergonomic and asthetic are prime requirements.
c) It’s cost must be low
d) All of the these
Answer: All of the these
47. MTTF and MTBF are applicable to
a) Only repairable items
b) Repairable and non-repairable items respectively
c) Only non-repairable items
d) Non-repairable and repairable items respectively
Answer: Non-repairable and repairable items respectively
48. The document used to introduce a product is called a/an
a) Proposal
b) Manual
c) Brochure
d) Engineering diary
Answer: Brochure
49. In case of bathtub curve, the failures are divided into.
a) Early failures
b) Random or catastrophic failures
c) Wear-out failures
d) All of the these
Answer: All of the these
50. NEMA-3R standard use to provide an applications in
a) General indoor applications.tion 1
b) Degree of protection against falling rain and sleet
c) Submersible enclosures
d) All of the these
Answer: General indoor applications.tion 1
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