MCQGeeks
0 : 0 : 1
CBSE
JEE
NTSE
NEET
English
UK Quiz
Quiz
Driving Test
Practice
Games
Quiz
Chemical Engineering
Chemical Engineering Basics
Quiz 17
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
Q.1
Blast furnace is a
Counter current reactor
Co-current reactor
Cross-current reactor
Combination of all the three
Q.2
Resilience of a bolt can be increased by increasing its
Length
Shank diameter
Head diameter
None of these
Q.3
The temperature at which a gas, when subjected to Joule-Thomson expansion, neither cools or heats up, is termed as the __________ temperature. Above this temperature the gas heats up on throttling and below this the gas cools down.
Isotactic
Saturation
Inversion
Throttling
Q.4
During decarburising of a plain carbon steel, the thickness of ferrite layer growth is proportional to
Time
Square root of time
Square of time
Cube of time
Q.5
Brazing is the joining of metals
Without melting the base metal
With a non-ferrous filler
Both A & B
Neither A nor B
Q.6
When water is sprayed on air, passing through an insulated chamber maintained at a temperature higher than the dew point of entering air but lower than its dry bulb temperature, then the air is
Cooled and dehumified
Heated and humidified
Cooled and humidified
Heated and dehumidified
Q.7
Percentage of gaunge is maximum in the ore of
Iron
Gold
Zinc
Copper
Q.8
Heat transfer by radiation from a hot body will be most rapid, if its surface is __________ because of its higher emissivity.
White & rough
Black & rough
White & polished
Black & polished
Q.9
Dislocations are __________ defects.
Point
Line
Volume
None of these
Q.10
Which of the following are considered applications of ultrasonic testing ?
Determination of elastic constant
Detection of defects in metal
Measurement of material thickness
None of the above
Q.11
The most commonly used moderator in nuclear power plant is
Graphite
Light water
Heavy water
Berellium
Q.12
Mechanism/phenomenon involved in the improvement of fatigue strength of a material by shot peening is the
Induction of residual compressive stress on the surface
Removal of stress concentration from the surface
Grain refinement
Surface polishing
Q.13
__________ test is the appropriate test to determine whether a material is ductile or brittle.
Impact
Cupping
Hardness
Tensile
Q.14
Basicity [%Cao + %MgO/% SiO₂) of the slag in Indian blast furnace is in the range of
0.7-1.0
1.1-1.4
1.5 - 1.8
2.0 - 2.5
Q.15
Thermoplastics are never moulded using
Injection moulding
Blow moulding
Extrusion
Compression moulding
Q.16
The factor of safety for brittle materials (having elongation < 5%) is based on the __________ stress.
Yield
Proof
Ultimate
None of these
Q.17
When the wavelength of incident X-rays increases, the angle of diffraction
Decreases
Increases
Remains constant
Shows no systematic variation
Q.18
Unit molar solution of __________ is the best conductor of electricity.
Sodium chloride
Acetic acid
Sulphuric acid
Sucrose
Q.19
In cold working of metal as compared to its hot working
Cracks and blow holes are eliminated
Ductility and impact strength improves
Appreciable strain hardening is produced
Yield stress, hardness and fatigue strength is not at all affected
Q.20
Cast iron has the unique property of high
Ductility
Damping characteristics
Hardness
Malleability
Q.21
The capital & running costs of similar machines having unequal service life can be compared by the __________ method.
Equivalant annual cost
Rate of return
Present net worth
Capitalised cost
Q.22
Carburettor in a spark ignition engine is used to
Mix air-fuel in the desired ratio
Maintain a constant speed at varying loads
Adjust the stroke length
Increase the compression ratio
Q.23
A material is capable of resisting softening at high temperature, because of its property termed as
Hot temper
Hot hardness
Fatigue
Creep
Q.24
With increase in pressure, the saturation temperature of steam
Increases rapidly first and then slowly
Increases slowly first and then rapidly
First increases and then decreases
None of these
Q.25
The capacity of a material to absorb energy depends upon both its strength & stiffness. The term 'stiffness' of a material is the opposite of its
Flexibility
Plasticity
Hardness
Hardenability
Q.26
__________ can not increase the fatigue strength of a material.
Grain refining
Grain coarsening
Surface hardening
Shot peening
Q.27
Which of the following absorbs maximum heat in a high pressure boiler ?
Economiser
Steam superheater
Air preheater
Furnace water wall
Q.28
Depreciation of machines fails under the indirect expenses head. As per income tax regulations, it is calculated by the __________ method.
Diminishing balance
Sinking fund
Multiple straight line
Sum of the years digit
Q.29
Fibre glass is a composite material of
Glass fibre in a polymer matrix
Glass fibre in a metallic matrix
Polymer fibre in a glassy matrix
Both B & C
Q.30
In connection with corrosion of metals, passivation is the process that
Intensifies deterioration
Changes the composition of the metal
Inhibits further deterioration
None of these
Q.31
Cast iron has the unique property of high
Ductility
Damping characteristics
Hardness
Malleability
Q.32
Which of the following is the terminology used for the temperature at which the phase changes occur in a metal ?
Critical temperature
Recrystallisation temperature
Phase transformation temperature
Transition temperature
Q.33
A spark ignition petrol engine has
Throttle valve
Carburettor
Both A & B
Neither A nor B
Q.34
__________ joint is mostly used for joining pipes carrying water at low pressure.
Nipple
Socket
Union
Bell and spigot
Q.35
Austempering process results in the formation of __________ structure.
Martensitic
Bainitic
Carburised
Stressed
Q.36
While the bin cards are used in the effective stores management, the queing theory is associated with the __________ time.
Waiting
Idle
Inspection
Tool replacement
Q.37
Most of the phosphorous present in the blast furnace burden enters into
Hot metal
Flue gases
Slag
Refractory lining
Q.38
The dimensions of Planck's constant is the same as that of the
Kinetic energy
Momentum
Electrostatic potential
None of these
Q.39
Which of the following has the highest density and the lowest melting point ?
Stainless steel
Titanium
Lead
Aluminium
Q.40
The primary strengthening mechanism in 70 : 30 brass is the
Solid solution strengthening
Precipitation hardening
Dispersion strengthening
Order hardening
Q.41
Pick out the wrong statement.
Cold cracking of a weld is due to the presence of hydrogen gas in the weld
True stress is given by, σ = σE (1 + εE), where σE and εE are engineering stress and engineering strain respectively
Phosphorous can be easily recovered in the iron blast furnace
High residual stress at the surface is beneficial for fatigue properties of a material
Q.42
Quartz is a __________ material.
Diamagnetic
Ferromagnetic
Ferroelectric
Piezoelectric
Q.43
Sulphur is melted in the sulphuric acid plant most commonly by employing
Electrical heater
Steam heater
Direct fuel oil fired heater
Gas fired furnace
Q.44
With increase in carbon percentage in steel, its
Yield stress decreases
Elongation percent increases
Tensile strength increases
Impact strength increases
Q.45
Machinability of hard alloys and tool steels is improved by
Spherodising
Annealing
Tempering
Normalising
Q.46
A steam carraying pipeline is insulated with two layers of insulating materials with the inferior insulation material forming the inner part. If the two insulating layers are interchanged, the heat conducted will
Increase
Decrease
Remain unaffected
May increase or decrease; depends on the thickness of each layer
Q.47
Which of the following hardness tests uses the depth of penetration caused by the indentor as the parameter for arriving at the hardness value of a material ?
Shore sceleroscope test
Vicker's hardness test
Brinell hardness test
Rockwell hardness test
Q.48
The malleability of a material is the property by virtue of which it can be rolled or hammered into thin sheets. Which of the following materials has the maximum malleability ?
Lead
Copper
Aluminium
Wrought iron
Q.49
What happens, when SO₂ is passed through a solution of H₂S in water?
Precipitation of sulphur takes place
H₂SO₃ is formed
Oleum is formed
None of these
Q.50
Glass reacts with
H₂SO₃
HF
HNO₃
K₂Cr₂O₇
0 h : 0 m : 1 s
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
Report Question
×
What's an issue?
Question is wrong
Answer is wrong
Other Reason
Want to elaborate a bit more? (optional)
Support mcqgeeks.com by disabling your adblocker.
×
Please disable the adBlock and continue.
Thank you.
Reload page