Practice Test: Question Set - 23
1. Strain gage pressure transducers are used to measure _________ pressures.
- (A) Gage
as well as vacuum
- (B) Absolute
as well as differential
- (C) Both (a) and (b)
- (D) Neither (a) nor (b)
2. Out of the following temperature measuring instruments, the measurement accuracy will be minimum for the
- (A) Mercury
in glass thermometer
- (B) Optical
pyrometer
- (C) Iron-constantan
thermocouple
- (D) Alcohol
filled thermometer
3. Starting temperature of optical radiation pyrometer is ________ °C.
- (A) 800
- (B) 400
- (C) 1200
- (D) 1500
4. Which of the following is a desirable characteristic of an instrument?
- (A) High drift
- (B) High
fidelity
- (C) High measuring lag
- (D) Poor
reproducibility
5. Emission spectroscopy is used for
- (A) Solids
and metal analysis
- (B) Determining
water purity
- (C) Determination of CO2 in
gases
- (D) NOx determination
6. The response of two tanks of same size and resistance in series is
- (A) Under
damped
- (B) Critically
damped
- (C) Over
damped
- (D) None
of the above
7. Pick out the first order system from among the following.
- (A) Damped
vibrator
- (B) Mercury
in glass thermometer kept in boiling water
- (C) Interacting
system of two tanks in series
- (D) Non-interacting
system of two tanks in series
8. Working principle of radiation pyrometer is based on the
- (A) Wien's law
- (B) Kirchoff’s law
- (C) Stefan-Boltzmann law
- (D) Seebeck effect
9. Which of the systems having following transfer functions is stable?
- (A) 1/(s2 +
2)
- (B) 1/(s2 -
2s + 3)
- (C) 1/(s2 +
2s + 2)
- (D) exp (-20s)/(s2 +
2s - 1)
10. Which of the following is not a speed measuring instrument?
- (A) Psychrometer
- (B) Stroboscope
- (C) Tachometer
- (D) All (a), (b) and (c)
11. Dead zone in an instrument must be less than ________ percent of the scale.
- (A) 0.2
- (B) 1.5
- (C) 4
- (D) 8
12. The transfer function for a first order process with time delay is
- (A) (eTdS)/(TS
+ 1)
- (B) (e-TdS)/(TS
+ 1)
- (C) 1/(TS + 1)(TdS
+ 1)
- (D) TdS/(Ts +
1)
13. ________ type of element is normally not used in the bimetallic thermometers.
- (A) Flat spiral
- (B) Bourdon tube
- (C) Single helix
- (D) Multiple helix
14. Alphatron measures pressure ________ microns.
- (A) < 1
- (B) < 3
- (C) > 3
- (D) < 0.1
15. Psychrometer determines the
- (A) Humidity of gases
- (B) Moisture content of
solids
- (C) Water of
crystallization
- (D) Hygroscopic nature of
solids
Next Tests: