MCQGeeks
0 : 0 : 1
CBSE
JEE
NTSE
NEET
English
UK Quiz
Quiz
Driving Test
Practice
Games
Quiz
Chemical Engineering
Chemical Engineering Basics
Quiz 23
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
Which of the following is not a natural abrasive?
Silicon carbide
Quartz
Corundum
Emery
Q.2
__________ stress can not be sustained by a fluid in equilibrium.
Shear
Tensile
Compressive
None of these
Q.3
Needles are produced by
Forging
Swaging
Extrusion
Machining
Q.4
A coal with high __________ content will ignite most easily.
Hydrogen
Oxygen
Volatile matter
Fixed carbon
Q.5
Energy of the sun arises mainly from __________ reactions.
Fusion
Fission
Combustion
None of these
Q.6
The specific gravity of coal depends mainly on its __________ content.
Carbon
Volatile matter
Ash
Moisture
Q.7
A __________ type pressure sensing element is commonly used in aneroid barometer.
Capsule
Bellow
Spiral tube
Flat diaphragm
Q.8
Heat treatment of steel is done to mainly change its __________ properties.
Physical
Chemical
Mechanical
Surface
Q.9
Current employed in resistance welding ranges from __________ kVA/cm² .
1.2 to 2.5
4.5 to 6.2
7.5 to 8.5
10.5 to 15.5
Q.10
High relative humidity decreases the evaporative process and as the temperature is increased, the relative humidity decreases. The comfort range for human body is the ambient temperature of 22 to 27°C with relative humidity ranging from __________ percent.
5 to 10
15 to 25
45 to 50
75 to 80
Q.11
All radiations falling on a black body are
Refracted
Reflected
Transmitted
Absorbed
Q.12
A furnace is made of a refractory brick wall of thickness 0.5 metre and thermal conductivity 0.7 W/m.°K For the same temperature drop and heat loss, this refractory wall can be replaced by a layer of diatomaceous earth of thermal conductivity 0.14 W/m.K and thickness __________ metre.
0.01
0.1
0.25
0.5
Q.13
Large scale fire on fuel gas line is normally extinguished by
Water
Steam
Foam
Nitrogen
Q.14
For the running of power generating turbines, the steam used should be
Wet
Superheated
At ordinary pressure
None of these
Q.15
The material used for coating the welding electrode is termed as the
Flux
Slag
Protective layer
Binder
Q.16
__________ has the highest melting point out of the following.
Tungsten
Zirconium
Molybdenum
Tantalum
Q.17
The __________ of a double acting reciprocating pump as compared to the single acting pump will be almost double.
Flow output
Head developed
Overall efficiency
Weight
Q.18
Which of the following accounts for maximum loss of energy in a coal fired boiler?
Incomplete combustion of fuel
Outgoing flue gases
Radiation heat losses
Unburnt carbon in ash
Q.19
An ideal material for making cooking vessels should have
High heat capacity
Low heat capacity
High thermal conductivity
Both B and C
Q.20
No cutting fluid is normally used, while machining
Cast iron
Aluminium
Mild steel
Stainless steel
Q.21
Fatigue strength of a metal is improved by
Overstressing
Scratching the surface
Raising the temperature
Understressing
Q.22
Theoretical volume of oxygen required for complete combustion of 1Nm³ of acetylene, in oxy-acetylene welding is __________ Nm³ .
0.5
1
2
2.5
Q.23
Annealing of a material does not
Permit its further cold working
Soften it
Case harden it
None of these
Q.24
Dislocation cross-slip is difficult in those materials, which have
Large number of slip systems
High work hardening rate
Coarse grain size
Low stacking fault energy
Q.25
The most economical channel section for the fluid flow is the one for which the discharge is maximum for a given cross-sectional area. Vertical velocity distribution in an open channel for laminar flow can be assumed to be
Parabolic
Hyperbolic
Straight line
None of these
Q.26
Which of the, following is not associated with the functioning of a petrol engine ?
Compression ignition system
Spark plug
Carburettor
Otto cycle
Q.27
With increasing carbon percent in steel beyond 0.8%, its ultimate tensile strength (UTS) and __________ is not affected.
Impact strength
Percent elongation
Hardness
Both B & C
Q.28
In a neutral solution
H⁺ ions are absent
OH⁻ ions are absent
Both H⁺ and OH⁻ ions are present in very small but equal concentration
None of these
Q.29
In an isochoric process,
There is no transfer of mass and energy
Free expansion of an ideal gas occurs
No mechanical work is done by the system
All of the above
Q.30
Drossing is a __________ operation.
Smelting
Dressing
Roasting
Dressing
Q.31
Grinding wheel made of silicon carbide is most suitable for grinding materials of low tensile strength (e.g; tough bronze). Grinding is a __________ operation.
Turning
Dressing
Forming
Surface finishing
Q.32
In hot working, dynamic recovery occurs in
Metals of low stacking fault energy
Metals of high stacking fault energy e.g. α-iron
Single crystal of Ni-based superalloys
None of these
Q.33
Leakage in a cooking gas cylinder is detected by
Radio-isotopes
Pouring soap solution on the surface and locating the gas bubbles
Halide torch
Pungent smell of mercaptans present in the gas
Q.34
Multistage compression is necessary for high efficiency,
If the ratio of the delivery pressure to the intake pressure exceeds 5:1
When large amount of gas is to be compressed
When the delivered gas is desired at very high velocity
None of these
Q.35
__________ the exhaust gas is an indication of the incomplete combustion of fuel.
Low temperature of
High temperature of
High % of CO in
High % of CO₂ in
Q.36
The softness or hardness of a grinding wheel depends upon the type & amount of bonding material used. For general purpose cutter grinding __________ grinding wheel is normally used.
Hard
Soft
Silicon carbide
Aluminium oxide
Q.37
Which of the following fastening devices has a head at one end and a nut fitted to the other?
Bolt
Stud
Top bolt
None of these
Q.38
Evaporative cooling process employs a combination of cooling and humidification in which the
Sensible heat is added
Sensible heat is removed and the latent heat is added
Latent heat is removed
Sensible heat is added and latent heat is removed
Q.39
The passage between the nozzle and the __________ is called 'sprue' in case of injection moulding.
Runner
Cylinder
Mold
None of these
Q.40
Heat dissipation in cooling towers is mainly by
Conduction
Convection
Evaporation
Radiation
Q.41
The boiling & freezing points on a newly defined temperature scale in degree 'D' are 400°D & 100°D respectively. The temperature reading corresponding to 60°C on this new temperature scale will be equal to __________ °D.
140
180
240
280
Q.42
Presence of sulphur in the fuel fired in a furnace
Contributes to its heating value
Helps in electrostatic precipitation of ash from flue gases
Corrodes ducts & air preheater, if the flue gas temperature is low
All of the above
Q.43
__________ furnace is generally used in the non-ferrous foundaries.
Direct arc
Indirect arc
Resistance
Induction
Q.44
'Amortization' in respect of financial obligation of a company means the
Liquidation of financial obligations on instalment basis
Commitment of financial obligation on priority
Liquidation of all the obsolete equipments of the company
Modernisation of the plant equipments
Q.45
In an amorphous material, atoms defy any definite atomic structure and exist in random pattern just like in liquid. Which of the following is an amorphous material?
Tin
Lead
Zinc
Glass
Q.46
Glycerene is used as a coolant in cooling of some engines instead of water, because
Its higher boiling point (290°C) increases its heat carrying capacity
Compartively less weight of coolant is required
Smaller radiator can be used
All of the above
Q.47
Difference at any instant between the value of the controlled variable and the set point is called the
Deviation
Derivative time
Error ratio
Differential gap
Q.48
Addition of silicon to aluminium improves its
Corrosion resistance
Machinability
Castability
None of these
Q.49
In continuous casting of liquid steel, the mould is made of
Water cooled steel
Water cooled copper
Refractory oxide
Silicon carbide
Q.50
Which of the following has the highest modulus of elasticity (about 7 x 10⁶ kg/cm²) ?
High speed steel
Stainless steel
Tungsten carbide
Superalloys
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