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Home » Engineering » Chemical Engineering » Aptitude Test - 16
1.Infrared radiation can pass through
A. thick wall
B. glass
C. water
D. thick wall
2. Thermal energy travels in
A. one way
B. two way
C. three way
D. one way
3. Warm air rises because it is
A. more dense than cool air
B. equally dense as cool air
C. less dense than cool air
D. more dense than cool air
4.At night, sea water gets
A. warm than land
B. cool than land
C. both a and b
D. warm than land
5.Earth is warm by heat energy coming from
A. sun
B. moon
C. universe
D. sun
6.When warm air rises over sea, its previous position is replaced by
A. more warm air from sea
B. cool air from sea
C. more cool air from land
D. more warm air from sea
7.The number of walls of a thermos is
A. 1
B. 2
C. 3
D. 1
8.The transfer of thermal energy without any medium is known as
A. conduction
B. convection
C. radiation
D. conduction
9. We can see sunlight because
A. light can pass through air
B. light can pass through opaque solids
C. light can pass through vacuum
D. light can pass through air
10.When air on the land is warm, the air on the sea is
A. also warm
B. cool
C. normal
D. also warm
11. Color and texture that is the best absorbate of radiant heat is
A. black and shiny
B. white and shiny
C. black and dull
D. black and shiny
12.The name of the scientist who invented thermos is
A. John Dalton
B. James Dewar
C. John Edison
D. John Dalton
13.Global warming effects
A. forests around the globe
B. temperature of the globe
C. wind and moisture of the globe
D. forests around the globe
14.The faster the particles vibration,
A. the more the frequency of waves
B. the more the amplitude of waves
C. the more the wavelength of waves
D. the more the frequency of waves
15. The energy of sun, soil and plants is
A. escaped from greenhouse
B. trapped in greenhouse
C. converted to light energy
D. escaped from greenhouse
16.The waves that are formed by vibration of hot particles, are known as
A. radio waves
B. micro waves
C. infrared waves
D. radio waves
17. For the same heat transfer Q and same overall heat transfer coefficient Uo, surface area required for cross flow operation is always
A. less than LMTD for parallel flow
B. more than LMTD for parallel flow
C. same as LMTD for parallel flow
D. less than LMTD for parallel flow
18. In parallel flow heat exchangers,
A. the exit temperature of hot fluid is always equal to the exit temperature of cold fluid
B. the exit temperature of hot fluid is always less than the exit temperature of cold fluid
C. the exit temperature of hot fluid is always more than the exit temperature of cold fluid
D. the exit temperature of hot fluid is always equal to the exit temperature of cold fluid
19. For the same heat transfer Q and same overall heat transfer coefficient Uo, surface area required for parallel flow operation is always
A. less than LMTD for counter flow
B. more than LMTD for counter flow
C. same as LMTD for counter flow
D. less than LMTD for counter flow
20.Shape factor is a property which depends
A. only on the ultimate stress of the material
B. only on the yield stress of the material
C. only on the geometry of the section
D. only on the ultimate stress of the material
21.The assumption in the theory of bending of beams, is :
A. material is homogeneous
B. material is isotropic
C. Young's modulus is same in tension as well as in compression
D. material is homogeneous
22.The shape factor of standard rolled beam section varies from
A. 1.10 to 1.20
B. 1.20 to 1.30
C. 1.30 to 1.40
D. 1.10 to 1.20
23.Shear strain energy theory for the failure of a material at elastic limit, is due to
A. Rankine
B. Guest or Trecas
C. Haig
D. Rankine
24.The point of contraflexure is the point where
A. B.M. changes sign
B. B.M. is maximum
C. B.M. is minimum
D. B.M. changes sign
25.The normal component of a force inclined through θ° is obtained by multiplying the force by
A. sin θ
B. cos θ
C. sin θ cos θ
D. sin θ
26.Stress may be defined as
A. force per unit length
B. force per unit volume
C. force per unit area
D. force per unit length
27.Total strain energy theory for the failure of a material at elastic limit, is known
A. Guest's or Trecas' theory
B. St. Venant's theory
C. Haig's theory
D. Guest's or Trecas' theory
28.The modulation technique used for mobile communication systems during world war II was
A. Amplitude modulation
B. Frequency modulation
C. ASK
D. Amplitude modulation
29.———– introduced Frequency Modulation for mobile communication systems in 1935.
A. Edwin Armstrong
B. Albert Einstein
C. Galileo Galilei
D. Edwin Armstrong
30. The early FM push-to-talk telephone systems were used in
A. Simplex mode
B. Half duplex mode
C. Full duplex mode
D. Simplex mode
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