MCQGeeks
0 : 0 : 1
CBSE
JEE
NTSE
NEET
English
UK Quiz
Quiz
Driving Test
Practice
Games
Quiz
Chemical Engineering
Chemical Engineering Basics
Quiz 20
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
X-rays do not exhibit the property of
Reflection
Scattering
Diffraction
Dispersion
Q.2
Dowtherm is a
High temperature heating medium (a petroleum product)
Product of coal tar distillation
Very heat sensitive material
None of these
Q.3
Alcohols are not suitable as diesel engine fuel because the cetane number of alcohols is
Very low which prevents their ignition by compression
Very high which prevents their ignition by compression
Zero
None of these
Q.4
During brazing, if the fluxes are entrapped, it results in the
Distortion of brazed joints
Cracking of joints
Presence of gas pockets
Corrosion
Q.5
Carbon percentage in high speed steel tool material is 0.6 to 1.0. The hardness of carbon tool steels is increased, when it is alloyed with
Vanadium & chromium
Silicon
Tungsten
Manganese
Q.6
Which of the following exemplifies resemblence with the extrusion process ?
Pneumatic ejection of abrasive solid particles through a nozzle
Toothpaste pouring out of the tube
Ejection of abrasive slurry through an opening
Viscous lubricant pouring out through its container's mouth
Q.7
Other parameters remaining same, the recrystallisation temperature of an alloy is lowered, when
Strain rate is increased
Grain size is increased
Prior cold deformation is increased
Not affected by any of the above parameters
Q.8
Largest application of laser welding is in __________ welding.
Microspot
Under water
Precious metals
Heavy structure
Q.9
Nitriding of steel is a process for
Case hardening
Spheroidising
Normalising
Annealing
Q.10
Pick out the wrong statement.
For a pressure vessel to be classified as 'thin vessel', the ratio of wall thickness to mean radius is less than 0.1
For calculating forces and efficiency of rivetted joint, either rivet diameter or rivet hole diameter is used in case of pressure vessel and in structural work
Longitudinal joint is normally made butt joint to maintain the circularity of the vessel
Maximum diameter of the opening provided in a pressure vessel, which does not require any compensation is 200 mm
Q.11
Diamagnetic materials
Are magnetised by eddy currents only
Are non-magnetic and can not be magnetised
Are magnetised in direction opposite to the magnetic field
Can be magnetised in one direction only
Q.12
The 'transition temperature' for ductile to brittle behaviour of steel increases with increase in the __________ content in steel.
Carbon
Manganese
Both A & B
Neither A nor B
Q.13
Dew point temperature always gives an indication of the __________ of the moist air.
Dryness
Moisture content
Coolness
Latent heat
Q.14
Factor of safety in machine design is defined as the ratio of ultimate stress to __________ stress.
Working
Bearing
Yield
None of these
Q.15
Which of the following does not lower the surface tension of liquids ?
Fat
Soap
Detergent
Surfactant
Q.16
Thermal expansion of solid is employed in the temperature measurement by a
Bimetallic thermometer
Thermocouple
Mercury thermometer
Resistance thermometer
Q.17
Often earing defects are found during deep drawing operation, because the
Surface finish of the sheet is poor
Sheet material has been given substantial spring back
Starting sheet has planer anisotropy due to its texture
Starting sheet has normal anitropy due to its texture
Q.18
Drills are usually made of
Cermets
High speed steel
Alloy steel
Tungsten carbide
Q.19
Which of the following is a disaccharide?
Lactose
Starch
Cellulose
Fructose
Q.20
Which one of the following is incombustible ?
H₂
CCl₄
C₂H₂
S
Q.21
A dense structure of grinding wheel is not used for the
Ductile material
Hard materials
Brittle materials
Finishing cuts
Q.22
The hardness of a grinding wheel is specified by the
Alphabetical letter
Rockwell hardness number
Brinell hardness number
None of these
Q.23
Reynolds number of a fluid flowing in a circular pipe is 10000. What will be the Reynolds number when the fluid velocity is decreased by 30% & the pipe diameter is increased by 30% ?
9100
13000
7000
2550
Q.24
Which of the following is an acidic constituent of B.F. slag ?
SiO₂
FeO
MgO
CaO
Q.25
Identify the correct statement.
Sphlerite is zinc oxide
The first law of the thermodynamics is stated as δE = δQ - δW
Lead can be produced in a blast furnace
T. ferrooxidans is a fungus that can be used for leaching chalcopyrite
Q.26
Desalination of water
Makes it potable
Makes it non-potable
Means distillation of water
None of these
Q.27
Which of the following is the most wear resistant grade of carbide used for the cutting tools?
Aluminium carbide
Tungsten carbide
Nickel carbide
Iron carbide
Q.28
In condensers used in thermal power plants, steam is normally used in shell side and cooling water on the tube side, because of the reason that
Compared to the mass flow rate of cooling water, the rate of condensation of steam is invariably smaller
Maintaining vacuum on tube side is more difficult than that on the shell side
Water velocity can be increased conveniently to increase the overall heat transfer co-efficient because of its lower specific volume compared to steam
Condenser can act as a storage unit for condensed steam
Q.29
Absolute zero pressure can be attained at a temperature of
0°C
50°K
0°R
None of these
Q.30
Which drug is made from vegetables ?
Pencilin
Aspirin
Quinine
Insulin
Q.31
The entropy change for a spontaneous process is
> 0 for the system
< 0 for the system
> 0 for the system & the surrounding
< 0 for the system & the surrounding
Q.32
Addition of silicon to cast iron
Promotes graphite module formation
Improves its ductility
Does not promote graphite flakes formation
Increases the fluidity of molten metal
Q.33
Dielectric
Is an electrical insulating material
Of low resistivity is preferred
Should have high thermal conductivity
Need not defy the corrosive action of chemicals
Q.34
Dew point of air indicates its
Moisture content
Dryness
Latent heat
Coolness
Q.35
Copper deposits are found in India at the following location:
Kudremukh
Kolar
Khetri
Ramagundam
Q.36
__________ remains constant during the adiabatic cooling of moist air.
Wet bulb temperature
Dry bulb temperature
Relative humidity
Specific humidity
Q.37
Pick out the wrong statement.
In a thin spherical shell under internal pressure, hoop stress is equal to the half of axial stress
Thermoplastic material does not follow Hooke's law of elasticity
Components under longitudinal compression is called 'struts' and the load under which strut fails is called crippling or buckling load
At low temperatures (sub-zero) in pressure vessels, the ductility of metal diminishes and brittle fracture occurs while at high temperature in pressure vessels, embrittlement of material may take plac
Q.38
Stainless steel is welded with difficulty because of
Its high melting temperature
Chances of cracking
Oxide film formation
Chromium carbide formation
Q.39
Which of the following properties of a solid is not dependent on crystal imperfection ?
Ductility
Semiconductiyity
Melting point
Yield stress
Q.40
Hot & cold working of material causes its __________ deformation.
Visco-elastic
Isotropic
Elastic
Plastic
Q.41
__________ of austenite decreases the hardenability in steel.
Fine grains
Coarse grains
Homogeneity
Dissolved elements (except cobalt)
Q.42
Ceramic tips for the cutting tool are prepared from __________ powder.
Carbon
Silicon carbide
Aluminium oxide
Tungsten
Q.43
Ceramic tips for the cutting tool are prepared from __________ powder.
Carbon
Silicon carbide
Aluminium oxide
Tungsten
Q.44
Transition from laminar to turbulent zone in free convection heat transfer is governed by the critical value of
Grashoff number
Grashoff number & Reynolds number
Reynolds number
Grashoff number & Prandtl number
Q.45
Saturated steam at a pressure of 25 kg/cm² is throttled to attain 5 kg/cm² . Then the outcoming steam will be
Wet
Saturated
Superheated
None of these
Q.46
Thermal conductivity of a material does not depend upon its
Mass
Volume
Surface area
All of the above
Q.47
Property responsible for the talcum powder to cling to the skin is the
Capillary action
Adhesion
Cohesion
Surface tension
Q.48
Increasing the temperature of a material makes it
Harder
Softer
Tougher
Stronger
Q.49
The starting of a car takes time in winter, because the
Octane number of fuel is decreased
Fuel supply for ignition is not sufficient
Vaporisation of the fuel is decreased
Pour point of fuel decreases
Q.50
The critical pressure at which the latent heat of vaporisation of steam becomes zero is __________ Kg/ cm².
273.15
225.65
100.03
373.15
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