| Post Name | JUNIOR INSTRUCTOR - LABORATORY ASSISTANT - CHEMICAL PLANT |
|---|---|
| Department | INDUSTRIAL TRAINING |
| Question Paper Code | 055/2016/OL |
| Category Code | 012/2010 |
| Date of Test | 13 June 2016 |
| Medium of Question | ENGLISH |
| Exam Type | Online Examination |
| Total Questions | 100 |
1
Hardness in water is caused by the presence of:
Answer
C. calcium chloride
2
pH of acidic solution is:
Answer
C. less than 7
3
Which of the following methods empolyes ion-selective membranes?
Answer
B. electrodialysis
4
Coagulants help in settling of:
Answer
D. both the suspended and colloidal particles.
5
Ultraviolet rays are used in water treatment for :
Answer
B. sterilization
6
Which of following fuel gases possess the highest calorific value?
Answer
B. coal gas
7
The process of splitting of bigger hydrocarbons into smaller hydrocarbon molecules, is called:
Answer
C. cracking
8
Analysis of flue gases is done by:
Answer
B. Orsat apparatus
9
Lignite is:
Answer
A. lowest rank coal
10
During fermentation of molasses, the enzyme which converts glucose and fructose into alcohol is:
Answer
A. zymase
11
For good performance, the hydrocarbon molecules in a diesel fuel should be:
Answer
C. straight-chained
12
EDTA method of determining hardness of water can be used to determine:
Answer
A. all types of hardness
13
During reverse osmosis:
Answer
C. pure water is pushed out through semipermeable membrane.
14
Swimming for a long time in salt water makes the skin of one′s fingertips wrinkled. Which one of the following properties is responsible for this observation?
Answer
A. Osmosis
15
Reflectivity of a black body is ----------
Answer
A. 0
16
For supporting horizontal cylindrical vessels ----------supports are commonly used
Answer
A. saddle
17
Scale formation in boilers causes :
Answer
B. wastage of heat
18
Multiple effect evaporation is carried out ,to -----------
Answer
D. decrease working cost
19
The calorific value of a fuel is expressed as :
Answer
C. kcal m-Âł
20
The process of vulcanisation makes rubber :
Answer
B. hard
21
Bakelite is manufactured by heating together :
Answer
A. phenol and formaldehyde
22
A plastic which can be softened on heating hardened on cooling is called :
Answer
B. thermoplastic
23
Desalination is a process of removing :
Answer
C. common salt
24
Most popular and ideal disinfectant in water works is :
Answer
C. chlorine
25
Standard atmospheric pressure in terms of water column is :
Answer
B. 10.33m
26
Electrolytic conduction is due to :
Answer
C. migration of ions to the oppositely charged electrodes
27
A galvenic cell converts :
Answer
B. chemical energy into electrical energy
28
Select a suitable adsorbent for the removal of phenolic contaminants from waste water
Answer
A. active carbon
29
The process of zinc coating over iron sheets by hot-dipping is called :
Answer
A. galvanisation
30
Drying oils supply to paint film :
Answer
D. all of these.
31
Butter is a colloidal sol containing :
Answer
A. water dispersed in fat
32
Tyndall effect is due to :
Answer
D. scattering of light
33
The atomic number of an element is 9. During compound formation, it normally :
Answer
C. gains 1 electron
34
Nature of bonding in diamond is :
Answer
B. covalent
35
Silicon is used in transistors as :
Answer
C. semiconductor
36
Most poisonous pollutant in water is :
Answer
A. arsenic
37
Bhopal gas tragedy in 1984 was caused by :
Answer
D. methyl isocyanate
38
Which one of the following refractories is used in nuclear engineering as moderator?
Answer
C. Beryllia bricks
39
A bullet-resistant glass is obtained by:
Answer
B. pressing together several layers of glass with vinyl resins in alternate layers
40
The single most important property of lubricating oil is its:
Answer
D. viscosity-index
41
Purest form of Iron is:
Answer
B. wrought iron
42
Caprolactum is a monomer of:
Answer
A. nylon-6
43
The emissivity of a real surface is always :
Answer
C. less than unity
44
Asphalt is obtained from-------in a refinery
Answer
A. residues
45
An example of high explosive is :
Answer
C. TNT
46
Identification of an organic compound can be established by using:
Answer
B. IR spectroscopy
47
Which noise can be tolerated by human ear?
Answer
C. 80 decibels
48
A fluid has no viscosity:
Answer
B. ideal fluid
49
The principle of continuity is based on
Answer
B. law of conservation of mass
50
The absolute pressure is equal to:
Answer
C. gauge pressure +atmospheric pressre
51
Which of the following is present in lemon?
Answer
D. citric acid
52
Which of the following pair have pH less than 7 ?
Answer
A. tea and coffee
53
When blue litmus is added to dil. HCl
Answer
C. it becomes red
54
A gas is neither combustible nor supporter of combustion, turns most blue litmus paper red, used in cold drinks. The gas is:
Answer
B. carbon dioxide
55
If we add phenolphthalein to dil.HCl :
Answer
B. The solution remains colourless
56
You are advised not to see the SUN directly with your eye,because the converging light will destroy the :
Answer
A. Retina
57
“When physical condition remain the same, the electric current flowing through a conductor is directly proportional to the potential difference”. This law is called :
Answer
A. Ohm’s law
58
Rheostat is used to vary:
Answer
A. current
59
Water movement against gravity is due to :
Answer
D. Transpiration
60
During rainy season,it is difficult to open and close doors and windows due to:
Answer
A. Imbibition
61
The odour of sulphur dioxide gas is:
Answer
A. Pungent
62
The problems of fluid statics are influenced by the following forces:
Answer
B. gravity and pressure forces
63
Mercury is generally used in manometers for measuring:
Answer
C. all pressures except the smaller ones
64
The flow in a river during the period of heavy rainfall is:
Answer
C. unsteady,non-uniform and three-dimensional
65
A pitot-tube is an instrument for measuring:
Answer
C. velocity of flow
66
The coefficient of discharge of a venturimeter lies within the limits:
Answer
D. 0.95-0.99
67
The Reynolds experiments for determining the character of flow in pipes involved:
Answer
C. observation of the condition of dye -filament which become wavy or irregular at the onset of the turbulence.
68
The laminar flow is characterized by:
Answer
B. fluid particles moving in layers parallel to the boundary layer
69
The parameters which determines the friction factor for turbulent flow in rough pipe are:
Answer
C. Reynolds number and relative roughness
70
In orifice flow, the vena contracta represents:
Answer
B. the location where the jet area is minimum , the streamlines parallel and the pressure atmospheric
71
What is the major use of carbon molecular sieve?
Answer
C. separation of air to produce nitrogen
72
Rotameter is used for measuring:
Answer
D. discharge of fluids
73
Joule-sec is the unit of
Answer
D. planck′s constant
74
Why are baffles provided in heat exchangers?
Answer
B. To increase heat transfer rate
75
Kinetic energy of a gas molecule is zero at :
Answer
D. -273°c
76
Cavitation will takes place in case of :
Answer
D. centrifugal pump
77
Fog is formed due to:
Answer
C. temperature fall of atmosphere
78
Velocity head is given by :
Answer
B. v²/2g
79
Inclined single column manometer is useful in the measurement of-----------------pressure.
Answer
A. small
80
To separate entrained liquid or solid in gas flow, we use a -----------.
Answer
C. drip leg
81
One kilogram of water contains 4g of NaoH .The concentration of the solution is expressed as:
Answer
A. 0.1molal
82
The first use of quantum theory to explain the structure of atom was made by:
Answer
B. Bohr
83
Which of the following relates to a photon both as wave motion and as a stream of particles?
Answer
D. E = hν
84
A larger increase in reaction rate with small rise in temperature is due to:
Answer
A. increase in number of activated molecules
85
The function of gypsum is to:
Answer
C. retard the easily initial setting of the cement
86
If the temperature remains constant, the volume of a given mass of gas is inversely proportional to its pressure.this statement is known as:
Answer
A. Boyle′s law
87
The kinematic viscosity is the ratio of:
Answer
A. viscosity to the density of the liquid
88
Tooth paste shows a -----------type of flow behaviour
Answer
C. Bingham plastic
89
At critical speed in a ball mill:
Answer
A. centrifugal force = gravitational force
90
Fractionating column is divided into two section,one is called as ------------section and other is called as ----------section
Answer
C. rectifying; stripping
91
The rule of material balance always deals with the equality of ----------------
Answer
C. masses in and out
92
The driving force for crystallization is ------------------------
Answer
D. super saturation
93
Pyrometers which react to all wavelengths of incident radiant energy are known as ---------pyrometers
Answer
B. total radiation
94
The major limitation of the first law of Thermodynamics that it doesnot consider:
Answer
C. direction of change
95
Fourier′s law states that the rate of heat transfer per unit surface area is proportional to the -----------------------gradient normal to the surface.
Answer
B. temperature
96
If there is a gravitational field acting on a fluid , then at any local region of the fluid the gravitational force per unit volume is the product of acceleration due to gravity and-------
Answer
A. density
97
The most effective heat exchanger is --------------
Answer
C. the cross-flow type
98
The ratio of the emissive power of a body to the emissive power of a black body at the same temperature is ---------to the absorptivity of the body
Answer
D. equal
99
Force by inertia is a product of mass and:
Answer
D. acceleration
100
Free convection arises from the------------differences between the fluid in contact with a surface and the surrounding fluid.
Answer
A. density
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