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Category: Chemical Engineering Basics
‘GASOHOL’ widely used in Brazil as a motor fuel is a mixture of alcohol and____________________?
A. Petrol
B. LPG
C. Light hydrocarbon gases (e.g. butane or propane)
D. None of these
Plastics as a material of construction suffer from the drawback of low_________________?
A. Machinability
B. Density
C. Strength
D. Plastic deformation
Biological shield in a nuclear reactor is generally provided to protect against the__________________?
A. α-rays
B. β-rays
C. Gamma rays & neutrons
D. Electrons
Principal alloying elements of cast tool alloys which have very high wear resistance & high temperature strength are ?
A. Cobalt, chromium & tungsten
B. Cobalt, chromium & nickel
C. Molybdenum, tungsten & chromium
D. Cobalt, zirconium & molybdenum
Transformation range for ferrous material is the temperature interval during which ___________________ is formed during its heating?
A. Cementite
B. Austenite
C. Martensite
D. Pearlite
At absolute zero temperature, for any reaction involving condensed phases ?
A. Δ G° = 0 , Δ H° = 0
B. Δ H° = 0 , Δ S° = 0
C. Δ S° = 0 , Δ E° = 0
D. Δ S° = 0 , Δ Cp° = 0
In troposphere (the weather domain), the temperature ‘t’ at height ‘h’ above the sea level in metres is given by (where, temperature at sea level is 15°C and t is in °C.) ?
A. t = 15 – 0.0065 h
B. t = 15 + 0.0065 h
C. t = 0.0035 h – 15
D. t = 15 – 0.0035 h
Fine grained steels have____________________?
A. High brittleness
B. Higher tendency to distort
C. High ductility
D. None of these
Stainless steel is welded using__________________?
A. Oxy-acetylene flame
B. Oxy-hydrogen flame
C. Arc welding
D. Inert gas arc welding
In case of a, centrifugal pump, the ratio h1/h2 is termed as the _____________ efficiency (where, h1 = actual measured head & h2 = head imparted to the fluid by impeller)?
A. Mechanical
B. Overall
C. Volumetric
D. Impeller
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