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Hassan
1.The color and texture of poor absorber of radiant heat is
A. black and shiny
B. black and dull
C. white and shiny
D. black and shiny
2.The cool air which comes from sea to land is known as
A. sea breeze
B. land breeze
C. forward breeze
D. sea breeze
3. Compared to hot air, cool air is
A. light
B. good conductor
C. more strong
D. light
4. Ideal temperature for warm bath water is usually between
A. 30 °C
B. 40 °C
C. 50 °C
D. 30 °C
5.Just like light, radiant heat can also be
A. reflected
B. turned off
C. used in LED
D. reflected
6.In hot places, well insulated house stays
A. warm
B. hot
C. cool
D. warm
7.Infrared radiation can pass through
A. thick wall
B. glass
C. water
D. thick wall
8. Thermal energy travels in
A. one way
B. two way
C. three way
D. one way
9. 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
10.At night, sea water gets
A. warm than land
B. cool than land
C. both a and b
D. warm than land
11.Earth is warm by heat energy coming from
A. sun
B. moon
C. universe
D. sun
12.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
13.The number of walls of a thermos is
A. 1
B. 2
C. 3
D. 1
14.The transfer of thermal energy without any medium is known as
A. conduction
B. convection
C. radiation
D. conduction
15. 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
16.When air on the land is warm, the air on the sea is
A. also warm
B. cool
C. normal
D. also warm
17. 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
18.The name of the scientist who invented thermos is
A. John Dalton
B. James Dewar
C. John Edison
D. John Dalton
19.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
20.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
21. 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
22.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
23. 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
24. 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
25. 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
26.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
27.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
28.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
29.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
30.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
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