Multiple choice question for engineering
Set 1
1. Which of the following represents telemetry?
a) Fetching data from inaccessible point
b) Fetching data from accessable point
c) Communication over telephone
d) None of the mentioned
Answer
Answer: a [Reason:] Telemetry is the process of accessing or collecting data from remote inaccessible points.
2. Telemetry includes data transfer over ______________
a) Wireless modes
b) Optical fibre link
c) Computer link
d) All of the mentioned
Answer
Answer: d [Reason:] Telemetry is the process of data transmission which may include over any known modes.
3. Which of the following represents a telemeter?
a) Analog device
b) Digital device
c) Both analog and digital device
d) None of the mentioned
Answer
Answer: c [Reason:] Telemeter is the device used for the purpose of telemetry, and it may be analog or digital in nature.
4. Which of the following mode of signals cannot be transmitted using telemetry?
a) Audio
b) Visual
c) Pictures
d) None of the mentioned
Answer
Answer: d [Reason:] All kind of information can be transferred using telemetry system.
5. All kind of informations are converted into _______________
a) Magnetic data
b) Electrical data
c) Optical data
d) All of the mentioned
Answer
Answer: b [Reason:] Before transmission, data is converted into electrical signals and then transmitted.
6. Telemetry allow data flow in ____________
a) Single direction
b) Both direction
c) Depend on design
d) None of the mentioned
Answer
Answer: a [Reason:] Telemetry allow data flow only in single direction, that is from source to receiver.
7. Telemetry systems are of electrical type only.
a) True
b) False
Answer
Answer: b [Reason:] Telemetry system may be of electrical, pneumatic or any other systems.
8. Which of the following is not true for telemeter?
a) Designed for all variable
b) Designed for specific range
c) Designed for data transmission
d) Wireless data transmission possible
Answer
Answer: a [Reason:] Telemetrs are designed for specific to certain variables.
9. Process of utilizing one data link for multiple data transfer is called ________________
a) Multiplexing
b) Over transfer
c) Multiprocessing
d) None of the mentioned
Answer
Answer: a [Reason:] Multiplexing is the process of use of single data link for transferring multiple data.
10. Telemechanics and telemetry are related.
a) True
b) False
Answer
Answer: a [Reason:] Tele mechanics deals with operations as desired for remote control and telemetry.
Set 2
1. Internal temperature of a hot body is measured by measuring __________________
a) Temperature of surrounding medium
b) Temperature of external surface
c) Direct measurement
d) Cannot measure internal temperature
Answer
Answer: b [Reason:] External surface temperature is measured and by estimating temperature gradient, internal temperature can be found.
2. Temperature gradient of a substance is _________________
a) Positive constant
b) Negative constant
c) Zero
d) Variable
Answer
Answer: d [Reason:] Temperature gradient is a variable, which may show variation in temperature measured.
3. Feedback system is used to ____________
a) Cancel use of temperature gradient
b) To reduce delay in measurement
c) To improve accuracy
d) None of the mentioned
Answer
Answer: c [Reason:] Feedback system in temperature balance system is used to improve accuracy in measurement.
4. If temperature T1 of material A is equal to temperature T2 of material B, then which of the following are correct?
a) Heat flow from A to B
b) Heat flow from B to A
c) No heat flow
d) Temperature at the junction increases
Answer
Answer: c [Reason:] If temperature of two materials are equal, no heat flow occurs between materials.
5. Which of the following represents closed loop thermal control?
a) Thermistor
b) Thermostat
c) Thermocouple
d) All of the mentioned
Answer
Answer: b [Reason:] Thermostat is a device which is an example of closed loop thermal control.
6. Which of the following true for temperature gradient?
a) Dimensional quantity
b) Dimensionless quantity
c) Unit less quantity
d) SI unit is K/m2
Answer
Answer: a [Reason:] Temperature gradient is a vector quantity with both magnitude and dimension.
7. Which of the following represents unit for temperature gradient?
a) K/m2
b) K
c) K/m
d) K/s
Answer
Answer: c [Reason:] Temperature gradient is a measure of temperature in kelvin measure per meter length.
8. Which of the following is correct for temperature gradient?
a) Describes direction of temperature change
b) Describes rate of temperature change
c) Describes both direction and rate of temperature change
d) None of the mentioned
Answer
Answer: c [Reason:] Temperature gradient is a factor which describes both rate and direction of temperature change.
9. Temperature gradient is a scalar quantity.
a) True
b) False
Answer
Answer: b [Reason:] Temperature gradient is a quantity with both direction and magnitude, and hence surely it is a vector quantity.
10. Which of the following represents rate of heat loss of a body?
a) Initial temperature
b) Final temperature
c) Difference in temperature between body and surrounding
d) None of the mentioned
Answer
Answer: c [Reason:] Difference in temperature between body and surrounding is direct measure of heat loss by body.
Set 3
1. Which of the following produce em radiation in ir region?
a) Body with negative temperature
b) Body with temperature less than 1000C
c) Body with temperature less than 6000C
d) Body with temperature less than 10000C
Answer
Answer: c [Reason:] Body with temperature between 0 to 6500C emit em radiation in infra-red region.
2. Energy of emitted radiation from a body increases with ______________
a) Increase in temperature
b) Decrease in temperature
c) No relation with temperature
d) Net energy cannot be changed
Answer
Answer: a [Reason:] Net energy emitted by body can be increased by increasing temperature.
3. Wavelength of peak radiation is represented by _____________
a) 28.91 * T
b) 2891/T
c) 189 * T
d) None of the mentioned
Answer
Answer: b [Reason:] Ratio of 2891 and temperature gives wavelength at which peak radiation is seen.
4. At 1000C wavelength of radiation will be ______________
a) Less than 10um
b) Less than 100um
c) Less than 1000um
d) Less than 10nm
Answer
Answer: a [Reason:] At 1000C 90% of emitted radiation will have less than 10um wavelength.
5. Radiation thermometers are pyrometers.
a) True
b) False
Answer
Answer: a [Reason:] Radiation thermometers are also known pyrometers.
6. Temperature sensor of silicon can detect wavelength of ______________
a) Less than 0.1 um
b) Less than 1.1 um
c) Less than 10nm
d) Greater than 100nm
Answer
Answer: b [Reason:] Silicon sensors can sense wavelength of less than 1.1 um.
7. Which of the following sensor have large response time?
a) Thermopile
b) Pyroelectric sensor
c) Lead sulphide sensor
d) Silicon sensor
Answer
Answer: a [Reason:] Thermopile require large response time (100ms).
8. IR thermograph is also known as_______________
a) Thermogram
b) Heat thermograph
c) Thermogram
d) None of the mentioned
Answer
Answer: c [Reason:] Infra-red thermograph is also known as thermogram.
9. IR thermography is useful in medical field.
a) True
b) False
Answer
Answer: a [Reason:] Many type of disease can be detected by using IR thermography.
10. Which of the following sensors provide higher temperature capacity?
a) Thermopile
b) Pyroelectric sensor
c) Lead sulphide sensor
d) Silicon sensor
Answer
Answer: d [Reason:] Silicon sensors have higher temperature capacity of 4000C.
Set 4
1. Time division multiplexing includes ___________________
a) Wired link
b) Radio link
c) Radio or wire link
d) None of the mentioned
Answer
Answer: c [Reason:] Time division multiplexing includes both radio or wired link according to application.
2. Which of the following data is correct for TDM?
a) Analog data is transmitted
b) Digital data is transmitted
c) Both analog and digital data transmitted
d) None of the mentioned
Answer
Answer: a [Reason:] Using TDM analog data is transmitted.
3. PAM stands for _______________
a) Pulse Amplitude Modulation
b) Power Amplitude Modulation
c) Pulse Additive Modulation
d) Pulse Amplitude Masking
Answer
Answer: a [Reason:] Term PAM stands for process Pulse Amplitude Modulation.
4. Commutators are mechanical switches in operation.
a) True
b) False
Answer
Answer: a [Reason:] Commutators perform operation of on and off and they function as mechanical switches.
5. Which of the following represents number of samples per second?
a) Product of frame rate and number of samples per frame
b) Frame rate
c) Ratio of samples per frame and frame rate
d) None of the mentioned
Answer
Answer: a [Reason:] Number of samples taken per second will be equal to product of frame rate and number of samples per frame.
6. What will be the general number of samples per frame?
a) 18
b) 30
c) 18 or 30
d) None of the mentioned
Answer
Answer: c [Reason:] Generally number of samples per frame will be 18 or 30.
7. Maximum rate of commutation will be _________________
a) 800 sample per second
b) 900 sample per second
c) 1200 sample per second
d) 1000 sample per minute
Answer
Answer: b [Reason:] Maximum rate of commutation in TDM will be 900 samples/sec.
8. Amplitude of each pulse of PAM train conveys the amplitude of particular channel sampled.
a) True
b) False
Answer
Answer: a [Reason:] : Amplitude data of particular sampled channel can be obtained from amplitude of PAM train.
9. PTM stand for _________________
a) Pulse train modulation
b) Pulse time modulation
c) Power train modulation
d) None of the mentioned
Answer
Answer: b [Reason:] PTM is the short form of pulse train modulation.
10. Which of the following can be generated from PDM signal?
a) PPM
b) PTM
c) PAM
d) PFM
Answer
Answer: a [Reason:] If PDM signals are available, PPM signal can be generated from PDM signals.
Set 5
1. CT stands for _____________
a) Controlled tomography
b) Computerized tomography
c) Converted tomography
d) Comparison tomography
Answer
Answer: b [Reason:] CT is the short form of computerized tomography.
2. Who invented Tomography?
a) Radon
b) Josef capek
c) Curie
d) Johnson
Answer
Answer: a [Reason:] In 1917, Radon invented tomographic machine.
3. Which of the following is used in tomography?
a) X ray
b) Gamma ray
c) UV ray
d) IR radiation
Answer
Answer: a [Reason:] X ray is used in tomography to get interior data of a body.
4. ECT stands for ________________
a) Electro cardio tomography
b) Electro capacitive tomography
c) Electro converging tomography
d) Electro Cornial tomography
Answer
Answer: b [Reason:] ECT or electro capacitive tomography is a method of tomography.
5. Which of the following is not possible?
a) ECT
b) ERT
c) Fibre optic tomography
d) None of the mentioned
Answer
Answer: d [Reason:] ECT, ERT, and fibre optic tomographies are different methods for tomography.
6. How many conductors are used in ERT?
a) 10
b) 12
c) 14
d) 16
Answer
Answer: d [Reason:] Normal number of conductors in ERT is 16.
7. EMT is working on the basis of __________________
a) Mutual inductance
b) Current flow
c) Self inductance
d) None of the mentioned
Answer
Answer: a [Reason:] Electro magnetic tomography is based on complex mutual inductance.
8. Fibre optic tomography is used in particle size ______________
a) Less than 10um
b) Less than 100um
c) Up to 1000nm
d) Up to 100nm
Answer
Answer: b [Reason:] Fibre optic tomography is used in particle size less than 100um.
9. Attenuation rate may vary in fibre optic tomography.
a) True
b) False
Answer
Answer: a [Reason:] Attenuation rate in fibre optic tomography vary according to particle size and nature.
10. A femto farad is equal to ____________
a) 10-15 farad
b) 10-10 farad
c) 10-5 farad
d) 1010 farad
Answer
Answer: a [Reason:] One femto farad is equal to 10-15 farad.