Comprehension And Aptitude Skills Lab Quiz
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Can you pass this comprehension and aptitude skills lab quiz? Lab skills mean the capability to carry out certain tasks that are done in a lab setting. There are various types of lab skills that depend on your scientific field. This quiz tests your comprehension and aptitude skills related to the lab work. Do you think you know enough? Why don't you prove it by taking this quiz and scoring high? Let's go!
- 1.Which of the following is the dynamic characteristics of an instrument ?
- A.
Sensitivity
- B.
Dead zone
- C.
Reproducibility
- D.
Fidelity
- 2.Flapper nozzle is used in a/an __________ controller
- A.
Pneumatic
- B.
Electronic
- C.
Hydraulic
- D.
None of these
- 3.The temperature of tempering oil baths maintained at 400°C during heat treatment of steel is measured by a/an __________ thermocouple.
- A.
Platinum-platinum/rhodium
- B.
Chromel-alumel
- C.
Iron-constantan
- D.
None of these
- 4.The closed loop pole of a stable second order system could be
- A.
Both real and positive
- B.
Complex conjugate with positive real parts
- C.
One real positive and the other real negative
- D.
Both real and negative
- 5.Working principle of radiation pyrometer is based on the
- A.
Kirchoffs law
- B.
Seebeck effect
- C.
Wien's law
- D.
Stafan-Boltzman law
- 6.Which of the following relates the emf. generated in a single homogeneous wire to the temperature difference ?
- A.
Peltier effect
- B.
Seebeck effect
- C.
Thomson effect
- D.
None of these
- 7.Response of a system to a sinusoidal input is called __________ response.
- A.
Frequency
- B.
Impulse
- C.
Unit step
- D.
None of these
- 8.Load cells are used for the measurement of
- A.
Velocity
- B.
Stress
- C.
Strain
- D.
Weight
- 9.Pick out the first order system from among the following.
- A.
Interacting system of two tanks in series
- B.
Non-interacting system of two tanks in series
- C.
Damped vibrator
- D.
Mercury in glass thermometer kept in boiling water
- 10.A negative gain margin expressed in decibels means a/an __________ system.
- A.
Critically damped
- B.
Stable
- C.
Unstable
- D.
None of these
- 11.Which of the following controllers has the least maximum deviation ?
- A.
P-controller
- B.
P-I controller
- C.
P-I-D controller
- D.
P-D controller
- 12.Which of the following is not a differential pressure flow meter ?
- A.
Flow nozzle
- B.
Rotameter
- C.
Venturimeter
- D.
Orificemeter
- 13.A typical example of a physical system with under damped characteristic is a
- A.
Thermocouple kept immersed in a liquid filled thermowell
- B.
Spring loaded diaphragm valve.
- C.
U-tube manometer
- D.
CSTR with first order reaction
- 14.Nichol’s chart deals with
- A.
frequency response values of controllers
- B.
Closed loop values Vs frequency response values
- C.
Closed loop values Vs open loop values
- D.
Open loop values Vs frequency response values
- 15.Which of the following thermocouples will give the highest output for the same value of hot and cold junction temperature ?
- A.
Platinum-platinum + rhodium
- B.
Iron-constantan
- C.
Chromel-constantan
- D.
All will give the same output
- 16.A system with a double pole at the origin is unstable since the corresponding term in the time domain
- A.
Is a constant
- B.
Grows exponentially with time
- C.
Grows linearly with time
- D.
Decays linearly with time
- 17.Thermal wells are used in the temperature measurement to
- A.
Reduce measuring lag
- B.
Increase the sensitivity
- C.
Guard against corrosive and oxidising action on thermocouple materials
- D.
Increase the fidelity
- 18.Psychrometer determines the
- A.
Humidity of gases
- B.
Moisture content of solids
- C.
Hygroscopic nature of solids
- D.
Water of crystallization
- 19.Positioning controllers are used for
- A.
Temperature changes
- B.
Low loads
- C.
High loads
- D.
Flow rate changes
- 20.The amplitude ratio for the sinusoidal response of a __________ is 1.
- A.
First order system
- B.
Second order system
- C.
Transportation lag
- D.
None of these
- 21.Pirani gauge is used for the measurement of
- A.
Liquid level under pressure
- B.
Liquid level at atmospheric pressure
- C.
High vacuum
- D.
Very high pressure
- 22.Bode diagram are generated from output response of the system subjected to which of the following input?
- A.
Impulse
- B.
Sinusoidal
- C.
Ramp
- D.
Step
- 23.Which of the following controllers has maximum offset ?
- A.
P-controller
- B.
P-I controller
- C.
P-D controller
- D.
P-I-D controller
- 24.On-off controllers are normally used for
- A.
Flow rate changes
- B.
Temperature changes
- C.
Low loads
- D.
None of these
- 25.The time constant of a unity gain, first order plus time delay process is 5 min. If the phase lag at a frequency of 0.2 rad/min is 60°, then the dead time (in minutes) is
- A.
π/12
- B.
5π/12
- C.
π/6
- D.
π/3
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