Chemical Engineering Basics Mcqs - Set 2

1)   The most suitable material of construction for a sewer to carry sewage under high pressure is________________________?

a. Asbestos cement
b. Steel
c. Cement concrete
d. Stoneware
Answer  Explanation 

ANSWER: Steel

Explanation:
No explanation is available for this question!


2)   Which of the following is not a dielectric material ?

a. Cotton, silk and paper
b. Asbestos, glass, porcelain and mica
c. Rubber and polymeric resins
d. All refractory materials
Answer  Explanation 

ANSWER: Rubber and polymeric resins

Explanation:
No explanation is available for this question!


3)   Particle nature of cathode rays is proved due to the fact that they ________________?

a. Travel in a straight line
b. Get deflected by magnetic electric field
c. Produce fluorescence
d. Heat the exposed material
Answer  Explanation 

ANSWER: Get deflected by magnetic electric field

Explanation:
No explanation is available for this question!


4)   Which of the following is prone to cup and cone fracture ?

a. Cast iron
b. Soft brass
c. Round specimen of ductile metal
d. Flat tensile specimen of ductile metal
Answer  Explanation 

ANSWER: Round specimen of ductile metal

Explanation:
No explanation is available for this question!


5)   Minimum safe distance between two liquid fuel storage tanks is equal to (where, H = height of the tank) ?

a. H
b. H/2
c. H/4
d. H/6
Answer  Explanation 

ANSWER: H/6

Explanation:
No explanation is available for this question!


6)   Austempering process results in the formation of ________________ structure ?

a. Martensitic
b. Bainitic
c. Carburised
d. Stressed
Answer  Explanation 

ANSWER: Bainitic

Explanation:
No explanation is available for this question!


7)   Good design of the casing of a centrifugal pump aims at minimising the __________________________?

a. Cavitation
b. Frictional losses
c. Kinetic energy loss
d. Static head
Answer  Explanation 

ANSWER: Kinetic energy loss

Explanation:
No explanation is available for this question!


8)   The ratio of mass of a neutron to that of an electron is about 1839. What is the ratio of the mass of a proton to that of an electron ?

a. 159
b. 1837
c. 2537
d. 10000
Answer  Explanation 

ANSWER: 2537

Explanation:
No explanation is available for this question!


9)   Matte smelting is used in the extraction of_____________________?

a. Lead
b. Zinc
c. Aluminium
d. Copper
Answer  Explanation 

ANSWER: Copper

Explanation:
No explanation is available for this question!


10)   Carnot cycle is also termed as the constant _________________ cycle in thermodynamics?

a. Entropy
b. Pressure
c. Volume
d. Heat
Answer  Explanation 

ANSWER: Heat

Explanation:
No explanation is available for this question!


11)   Large diameter reinforced cement concrete (RCC) pipes are generally joined by ____________________ joint ?

a. Flanged iron
b. Collar
c. Flexible
d. Expansion
Answer  Explanation 

ANSWER: Collar

Explanation:
No explanation is available for this question!


12)   A dummy activity is used in PERT network to describe the_____________________?

a. Precedence relationship
b. Resource idleness
c. Resource restriction
d. Necessary time delay
Answer  Explanation 

ANSWER: Precedence relationship

Explanation:
No explanation is available for this question!


13)   Unit of viscosity in CGS system is_______________________?

a. gm .cm-1 sec-1
b. gm . cm2 . sec-2
c. gm .cm-2, sec-1
d. gm . cm . sec-1
Answer  Explanation 

ANSWER: gm .cm-1 sec-1

Explanation:
No explanation is available for this question!


14)   The refractory lining of the bottom in a basic electric arc furnace is made of___________________?

a. Silica
b. Alumina
c. Magnesia
d. Fireclay
Answer  Explanation 

ANSWER: Magnesia

Explanation:
No explanation is available for this question!


15)   The specific gravity of coal depends mainly on its __________________ content ?

a. Carbon
b. Volatile matter
c. Ash
d. Moisture
Answer  Explanation 

ANSWER: Moisture

Explanation:
No explanation is available for this question!


16)   In practice, the compression ratio of compression-ignition (CI) engine ranges from ______________________?

a. 15 to 25
b. 5 to 10
c. 40 to 55
d. 60 to 70
Answer  Explanation 

ANSWER: 15 to 25

Explanation:
No explanation is available for this question!


17)   Brittleness induced due to the presence of sulphur in steel can be reduced by adding____________________?

a. Manganese
b. Magnesium
c. Vanadium
d. Copper
Answer  Explanation 

ANSWER: Manganese

Explanation:
No explanation is available for this question!


18)   With increase in temperature, the surface tension of water_______________________?

a. Increases
b. Decreases
c. Remain constant
d. Increases linearly
Answer  Explanation 

ANSWER: Decreases

Explanation:
No explanation is available for this question!


19)   Compressed dry air is used as the cutting fluid, while machining____________________?

a. Steel
b. Cast iron
c. Aluminium
d. None of these
Answer  Explanation 

ANSWER: Cast iron

Explanation:
No explanation is available for this question!


20)   With increase in compression ratio, the volumetric efficiency of air compressor____________________?

a. Increases
b. Decreases
c. Remain same
d. May increase or decrease (depends on the suction pressure)
Answer  Explanation 

ANSWER: Increases

Explanation:
No explanation is available for this question!


21)   Which of the following has the least value of ultimate tensile strength (UTS) ?

a. Medium carbon steel
b. High carbon steel
c. Cast iron
d. Wrought iron
Answer  Explanation 

ANSWER: High carbon steel

Explanation:
No explanation is available for this question!


22)   Current employed in resistance welding ranges from ____________________ kVA/cm2?

a. 1.2 to 2.5
b. 4.5 to 6.2
c. 7.5 to 8.5
d. 10.5 to 15.5
Answer  Explanation 

ANSWER: 4.5 to 6.2

Explanation:
No explanation is available for this question!


23)   Presence of nickel & chromium in steel does not raise its _________________?

a. Elastic limit
b. Machining properties
c. Ductility
d. Resilience
Answer  Explanation 

ANSWER: Elastic limit

Explanation:
No explanation is available for this question!


24)   Materials having ________________ lattice structure are usually the most ductile ?

a. Body centred cubic (bcc)
b. Hexagonal close packed (hcp)
c. Face centred cubic (fcc)
d. None of these
Answer  Explanation 

ANSWER: Face centred cubic (fcc)

Explanation:
No explanation is available for this question!


25)   Stresses encountered in the metal forming processes are less than the _____________ of the material?

a. Fracture strength
b. Yield strength
c. Elastic limit
d. Limit of proportionality
Answer  Explanation 

ANSWER: Fracture strength

Explanation:
No explanation is available for this question!


26)   Damage to metal surface by mechanical action is called____________________?

a. Pitting
b. Corrosion
c. Erosion
d. None of these
Answer  Explanation 

ANSWER: Erosion

Explanation:
No explanation is available for this question!


27)   Minimum number of members required to form a Public Limited Joint Stock Com-pany is___________________?

a. 7
b. 10
c. 12
d. 17
Answer  Explanation 

ANSWER: 7

Explanation:
No explanation is available for this question!


28)   Increase in the entropy of a system represents the_____________________?

a. Degradation of energy
b. Decrease in system pressure
c. Increase in the availability of energy
d. Increase in the temperature
Answer  Explanation 

ANSWER: Degradation of energy

Explanation:
No explanation is available for this question!


29)   Spherical shape of mercury droplets is due to its____________________?

a. High viscosity
b. Low surface tension
c. High density
d. High surface tension
Answer  Explanation 

ANSWER: High surface tension

Explanation:
No explanation is available for this question!


30)   Carbon is present in the form of _______________________ in grey cast iron ?

a. Spheroids
b. Nodular aggregates of graphite
c. Flakes
d. Cementite
Answer  Explanation 

ANSWER: Flakes

Explanation:
No explanation is available for this question!


31)   The heat of neutralisation remains constant, when there is a reaction between dilute solutions of strong _____________________?

a. Base and strong acid
b. Base and weak acid
c. Acid and weak base
d. None of these
Answer  Explanation 

ANSWER: Base and strong acid

Explanation:
No explanation is available for this question!


32)   ‘Cryogenics’ is concerned with the generation & use of low temperature in the range of____________________?

a. 0°K to 123°K
b. 0°C to – 123°C
c. 0°C to – 273°C
d. 0°K to 273°K
Answer  Explanation 

ANSWER: 0°K to 123°K

Explanation:
No explanation is available for this question!


33)   __________________ of air does not increase with increase in temperature?

a. Density
b. Thermal diffusivity
c. Viscosity
d. Thermal conductivity
Answer  Explanation 

ANSWER: Density

Explanation:
No explanation is available for this question!


34)   The value of y = cp/cv. at < 500°C for air & most common gases can be safely assumed to be_____________________?

a. 0.8
b. 1
c. 1.4
d. 1.8
Answer  Explanation 

ANSWER: 1.4

Explanation:
No explanation is available for this question!


35)   Which of the following varies as the square root of oil pressure during atomisation of fuel oil through a pressure jet burner ?

a. Output & fineness
b. Velocity
c. Both A. & B.
d. None of these
Answer  Explanation 

ANSWER: Both A. & B.

Explanation:
No explanation is available for this question!


36)   ______________ joint is usually used for joining cast iron pipes mostly used for temporary pipelines, where it may be necessary to dismantle & reassemble the pipeline very frequently ?

a. Collar
b. Flanged
c. Bell and Spigot
d. Expansion
Answer  Explanation 

ANSWER: Flanged

Explanation:
No explanation is available for this question!


37)   The pressure outside a bubble/droplet of liquid is ________________ the internal pressure?

a. Greater than
b. Less than
c. Equal to
d. Unpredictable; depends on the bubble size
Answer  Explanation 

ANSWER: Less than

Explanation:
No explanation is available for this question!


38)   Alumina, silica, lime and iron oxide are the basic raw material for the manufacture of Portland cement. The component of Portland cement which first hardens is_____________________?

a. 5CaO. 3 Al2O3
b. 3CaO. Al2O3
c. 3CaO. SiO2
d. 2CaO. SiO2
Answer  Explanation 

ANSWER: 5CaO. 3 Al2O3

Explanation:
No explanation is available for this question!


39)   Oxygen cylinders used for autogenous (cutting/welding) purposes are ___________________?

a. Seamless & made of steel
b. Heat treated before use
c. Made by sand casting
d. Welded steel cylinders
Answer  Explanation 

ANSWER: Seamless & made of steel

Explanation:
No explanation is available for this question!


40)   Heating of ferromagnetic materials to a temperature above Curie temperature makes it ________________________?

a. Insulator for heat & electricity transmission
b. Ferritic
c. Behave like paramagnetic materials
d. Superconductor
Answer  Explanation 

ANSWER: Behave like paramagnetic materials

Explanation:
No explanation is available for this question!