| Post Name | Junior Instructor in Laboratory Assistant (Chemical Plant) - Industrial Training |
|---|---|
| Question Paper Code | 135/2024/OL |
| Category Code | 648/2023 |
| Date of Test | 19 December 2024 |
| Exam Type | Online Examination |
| Total Questions | 100 |
1
An element Hydrogen combines with oxygen to form water as a product, the same element hydrogen combines with oxygen to form hydrogen peroxide as another product. Which law of chemical combination is illustrated in this example.
Answer
C. Law of Multiple proportion
2
Calculate the Molarity of a solution prepared by dissolving 20 g of NaOH in 500 ml of water
Answer
A. 1M
3
Equilibrium constant for the reaction Nā + 3Hā ā 2NHā is 7. What is the equilibrium constant for the reaction 4NHā ā 2Nā + 6Hā?
Answer
D. 1/49
4
How many electrons are present in the 4S atomic orbital of atom ?
Answer
C. 1
5
What is the IUPAC name of the element with atomic number 110 ?
Answer
D. Ununnilium
6
Group 16 elements form Hydrides having the general formula HāM (M=O, S, Se, Te). Which among these is the strongest reducing agent?
Answer
D. HāTe
7
A balloon is ļ¬lled with oxygen at 300K. It will burst if pressure exceeds 0.3 atm. If at 1 atm pressure the gas occupies 2.27 litre volume, upto what volume the balloon can be expanded without changing the temperature.
Answer
C. 7.56 L
8
A container is ļ¬lled with 16 g Oxygen, 42 g Nitrogen and 8 g Helium. If the total pressure of the container is 12 atm, what is the partial pressure of Nitrogen in the container
Answer
B. 4.5 atm
9
According to WHO standards, what is the standard limit of Ammonia in mg/L in drinking water
Answer
A. 1.5
10
What is the amount of CO in g/km in vehicular exhaust of passenger cars according to Bharath Stage 4 Norms ?
Answer
B. 1.0
11
How many joules of heat is absorbed when 72 g of water is vaporised at its boiling point. Latent heat of vaporisation of water is 2260 kJ/kg ?
Answer
C. 113 kJ
12
4 kg of ice at -10Ā°C is mixed with 10 kg of water at 10Ā°C in an insulating vessel having negligible heat capacity. Calculate the ļ¬nal mass of water remaining in the container. Speciļ¬c heat of water and ice are respectively 4.184 kJ and 2.092 kJ . Molar enthalpy of fusion of ice is 334.7 kJ
Answer
A. 11 kg
13
What is the percentage of carbon in pig iron ?
Answer
C. 4
14
In the extraction of Aluminium, puriļ¬ed alumina is mixed with this is to
Answer
D. Both A and B
15
Among the hydrides of group 15 elements (nitrogen family) which is having the lowest Boiling point
Answer
B. PHā
16
contains two types of P-Cl bond called axial and equatorial bond. The bond length of P-Cl equatorial bond is 202 pm. What is the bond length of P-Cl axial bond ?
Answer
C. 240 pm
17
Equilibrium is affected by temperature. What happens to 2NOā(g) ā NāOā(g), ĪH = ā57.2 kJ molā»Ā¹, when temperature is increased?
Answer
B. Rate of backward reaction increases
18
A compound contains the elements Carbon, hydrogen and Oxygen with percentage mass 26.08, 4.34 and 69.5 respectively. What is the Empirical Formula of the compound?
Answer
A. CHāOā
19
decays with a half life of 69.3 years to produce . What is the decay constant of the radioactive disintegration of
Answer
D. 0.01 year
20
When a positron is emitted from an atom, the mass number and atomic number of the daughter nucleus ?
Answer
B. Mass number does not changes, atomic number decreases
21
The motion of a couple is
Answer
B. Rotational
22
The ratio of the distance moved by the eļ¬ort to the distance moved by the load is called
Answer
D. Velocity Ratio
23
The ratio of linear stress to the linear strain is called
Answer
C. Modulus of Elasticity
24
According to ___________, when a material is loaded within elastic limit, the stress is directly proportional to strain
Answer
A. Hooke's Law
25
The heat energy stored in the gas and used for increasing its temperature is known as
Answer
C. Internal Energy
26
Heat transfer is possible from one body to another by
Answer
D. All of the above
27
The actual power delivered by the engine is known as
Answer
A. Brake Power
28
The speciļ¬c heat of air at constant pressure is ___________ KJ/KgĀ°K
Answer
B. 1.005
29
The change in internal energy of a perfect gas is directly proprtional to the change in temperature. This statement is called
Answer
A. Joule's Law
30
If a system will be in a state of thermodynamic equilibrium, which of the following equilibrium are satisļ¬ed
Answer
D. All of the above
31
In shunt type ohm meter zero marked at
Answer
A. Left side of the scale
32
What material is used for cover submarine cable ?
Answer
B. Gutta percha
33
What is the coefficient of linear expansion of COPPER at 20Ā°C?
Answer
C. 17Ć10ā»ā¶ per Ā°C
34
One Calorie equal to
Answer
D. 4.184Ć10ā· ergs
35
Which fuse element used in GEC HRC cartridge fuse ?
Answer
A. Silver
36
What is the dielectric constant of pure water ?
Answer
A. 80
37
What is the electrochemical equivalent of mercury ?
Answer
A. 2.0791 milli-gram/coulomb
38
What is the minimum resistance can obtain by combining of three resistance each of value 1/3 ohm them ?
Answer
D. 1/9 Ohm
39
What is the colour of pure Zinc
Answer
A. Bluish White
40
Which rule makes a connection to the switch as live controller ?
Answer
C. Rule 32
41
1 Torr =
Answer
A. 19.34 Ć 10ā»Ā³ PSI
42
Among the following statement which is/are correct about the thermal conductivity gauge i) it is used for the measurement of vacuum ii) Pirani gauge is an example for thermal conductivity gauge iii) Ionization gauge is an example for thermal conductivity gauge
Answer
D. Only (i and ii)
43
Which of the following statement is/are wrong in the case of ļ¬lled system thermometer ? i) The bourdon tube coils tights as pressure increases and uncoils as pressure decreases. ii) Due to immersion error a lower temperature is indicated by the thermometer iii) Accuracy and temperature span is much higher compared to electrical type instruments
Answer
C. Only (i and iii)
44
Which thermocouple has the most linear characteristics
Answer
B. Type K
45
Which of the following statement is/are true in the case of two position controlller i) process disturbances and interferences causes the output to cycle rapidly. ii) a diļ¬erential gap is added to prevent cycling. iii) two position controllers are generally hydraulic devices.
Answer
C. Only (i and ii)
46
Hydraulic controllers are used where
Answer
B. Both high power and fast speed of response are required
47
To avoid loading eļ¬ects, a transducer should have
Answer
D. High input impedance and Low output impedance
48
Which of the following statement is wrong regarding SMART transmitter i) calibrate the unit over much wider range ii) smart transmitters have lower error and lower rangeability iii) smart transmitters allow only one way communication
Answer
A. Only (ii and iii)
49
Which of the following statements are wrong regarding circular chart recorder ? i) Time lines are straight lines ii) Chart based on polar coordinates iii) readability is the same for all values of scale
Answer
B. Only (i and iii)
50
Which of the following statements are true regarding strip chart recorder ? i) A graphic recorder ii) Self balancing type recorder iii) They are generally used on the potentiometric type instrument
Answer
C. All of the above (i, ii and iii)
51
The halogens present in an organic compound is determined by
Answer
C. Carius method
52
The product formed by the hydroboration oxidation of but-1-ene is
Answer
D. Butan-1-ol
53
(+)-Sucrose is known as table sugar. Select the incorrect statement about sucrose from the following
Answer
B. It reduces Tollen's reagent
54
At the isoelectric point, amino acids exist as
Answer
A. Dipolar ion with a zero net charge
55
The correct statement about the heterocyclic compound Pyridine is
Answer
A. It undergoes electrophilic, substitution reaction under vigorous condition and the substitution occurs mainly at the 3-position
56
Condensation of two molecules of dimethyl aniline with one molecule of benzaldehyde produce the dye
Answer
C. Malachite green
57
The strengths of Acetic acid (I), chloroacetic acid (II), dichloroacetic acid (III) and trichloroacetic acid (IV) follow the order
Answer
D. IV > III > II > I
58
The product formed when phenyl magnesium bromide reacts with acetaldehyde followed by hydrolysis is
Answer
B. I-phenyl ethanol
59
Read the following statements about soap and select the options in which all the answers are correct I) Soap is formed by saponiļ¬cation II) Saturated fats give soft soaps III) Unsaturated fats give soft soaps IV) Soft soaps are usually the potassium salts
Answer
C. I, III, IV
60
The pleasant smell of fruits is due ot the presence of
Answer
D. Esters
61
1 ppm =
Answer
B. 1 mg/L
62
A stronger oxidant commonly used for COD test is
Answer
A. CrāOā
63
Which law states that the relative lowering of vapour pressure of solution is equal to the mole fraction of the solute ?
Answer
C. Rault's law
64
The indicator used to determine hardness of water by EDTA method
Answer
D. Eriochrome black-T
65
The another name of carbamide
Answer
B. Urea
66
Temporary hardness of water can be removed by
Answer
C. Boiling
67
Hydrated sodium alumino silicate is known as
Answer
A. Zeolite
68
Negative logarithm of hydrogen ion concentration is called
Answer
C. pH
69
The major raw material for the manufacture of phosphorous fertilizer is
Answer
A. Phosphate rock
70
Hardness can be expressed in terms of equivalents of
Answer
B. Calcium carbonate
71
In Orsat's apparatus KOH is used to absorb
Answer
B. Carbon dioxide
72
Bomb Calorimeter is used for determining the caloriļ¬c value of
Answer
D. Both (A) and (B)
73
Coal having maximum carbon content and maximum caloriļ¬c value is
Answer
C. Anthracite
74
The amount of Nitrogen in coal is determined by
Answer
D. Ultimate analysis
75
If ļ¬ue gas contain Carbon monoxide it indicates i) Complete combustion ii) Incomplete combustion iii) Short supply of oxygen iv) Oxygen is excess
Answer
D. Only (ii and iii)
76
Which of the following contain highest percentage of volatile matter ?
Answer
A. Peat
77
Presence of functional groups in an organic compound can be determined by
Answer
A. IR spectroscopy
78
If the molar concentration of the sample is tripled and length of the path of the beam through the sample is doubled, then absorbance at a particular wavelength will be
Answer
D. 6 times
79
Particle size analysis can be done using sieve analysis for the particle diameter
Answer
D. Greater than 0.075 mm
80
In Tyler standard screens the 200 mesh screen have an opening of 0.0029 inch. 150 mesh screen, a coarser screen placed just above the 200 mesh screen will have an opening of size
Answer
B. 0.0041 inch
81
Alkaloid present in black pepper is
Answer
B. Piperine
82
If carbon content of steel is increased, which of the following parameter of steel will be reduced ?
Answer
C. Ductility
83
Eļ¬ect of vanadium on properties of alloy steel is
Answer
D. To enhance Tensile strength
84
Rancidity of lipids or fat rich food is due to
Answer
A. Oxidation of fatty acids
85
Partial hydrogenation of vegetable oils in presence of Ni catalyst at 200Ā°C gives
Answer
A. Vanaspati ghee
86
The salt used in fruit processing operations below 0.1% is
Answer
A. Calcium
87
The test used to evaluate the eļ¬cacy of preservatives is
Answer
B. Preservative challenge test
88
Identify the compound that does not act as a target for drug action in the human body
Answer
C. Vitamin C
89
Animal fats having a greater proportion of saturated acid residues have
Answer
A. Low iodine value
90
The indicator for adulteration of ghee is
Answer
D. Reichert Meissl value
91
Which of the following is a major use of phase-contrast microscopy
Answer
C. Examining microbial motility and live cell morphology
92
In the context of membrane ļ¬lters used for liquid sterilisation, what does 'pore size' refer to and why is it important ?
Answer
B. The diameter of the tiny holes in the ļ¬lter, which controls the size of microorganisms that can pass through
93
Which among the following statements regarding capsules and slime layers is correct ?
Answer
A. A capsule is tightly attached and excludes small particles, while a slime layer is loosely attached and more easily deformed
94
Which of the following is an example of a Gram-positive microbe ?
Answer
C. Staphylococcus aureus
95
Which of the following is an example of an enrichment medium used to enhance the growth of speciļ¬c microbes ?
Answer
C. Selenite F Broth
96
Which of the following is a primary factor that diļ¬erentiates lager beer fermentation from ale beer fermentation ?
Answer
A. The type of yeast used and fermentation temperature
97
What is the primary function of hops in beer production ?
Answer
B. To enhance the aroma and add bitterness, balancing the sweetness of the malt
98
Which among the following statements about SEM (Scanning electron microscope) is correct ?
Answer
A. SEM provides a three-dimensional view of the surface structures of microorganisms
99
Which of the following bacteria uses light energy and organic compounds as a carbon source ?
Answer
C. Photoheterotrophs
100
Which of the following is a primary component of endotoxins found in the outer membrane of Gram-negative bacteria ?
Answer
A. Lipid A
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