Which of the following statements refer to correct purpose as regards testing of concrete by ultrasonic pulse velocity method? 1. To assess the quality of concrete in-situ. 2. To determine the dynamic modulus of elasticity of concrete. 3. To locate the presence of cracks in it (a) 1 and 2 only (b) 1 and 3 only (c) 2 and 3 only (d)1, 2 and 3

Which of the following statements refer to correct purpose as regards testing of concrete
by ultrasonic pulse velocity method?
1. To assess the quality of concrete in-situ.
2. To determine the dynamic modulus of elasticity of concrete.
3. To locate the presence of cracks in it
(a) 1 and 2 only (b) 1 and 3 only (c) 2 and 3 only (d)1, 2 and 3
by

1 Answer

Answer :

(d)1, 2 and 3
by

Related questions

Consider the following statements: Percentage of steel for balanced designed of a singly reinforced rectangular section by limit state method depends on (1) Characteristic strength of concrete (2) Yield strength of concrete (3) Modulus of elasticity of steel (4) Geometry of the section. Which of these statements are correct? (a) 2, 3 and 4 (b) 1, 3 and 4 (c) 1, 2 and 4 (d) 1, 2 and 3

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Last Answer : 1,2,4

Which one of the following statements is not correct with respect to PSC beams? (a) Loss due to shrinkage is proportional to water-cement ratio used in concrete (b) Loss due to creep is proportional to the age of the member at the time of loading. (c) Loss due to elastic deformation is directly proportionally to the modulus of elasticity of concrete (d) Loss due to friction occurs in post tensioned concrete members

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Last Answer : (c) Loss due to elastic deformation is directly proportionally to the modulus of elasticity of concrete

Ultrasonic Pulse Velocity test is meant for a) Identifying the integrity of concrete* b) Finding the strength of concrete c) To know the crack in steel structure d) To know the flaw in rail

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Explain the ultrasonic pulse velocity test and techniques of measuring pulse velocity through concrete.

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State principle of ultrasonic pulse-velocity test on concrete.

Description : State principle of ultrasonic pulse-velocity test on concrete. 

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Last Answer : [ B ] 5000 vfCK

Explain process of transmission ultrasonic testing and pulse echo UT testing.

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Consider the following statements: 1. Relative density is a meaningful parameter for all types of soils 2. Relative density is a meaningful parameter only for cohesion soils. 3. Relative density is a better indicator of the denseness of an in-situ granular soil deposit than the void ratio. Which of these statements are correct? (a) 1, 2 & 3 (b) 1 & 2 only (c) 2 & 3 only (d) 1 & 3 only

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A steel bar 5 m × 50 mm is loaded with 250,000 N. If the modulus of elasticity of the material is 0.2 MN/mm2 and Poisson's ratio is 0.25, the change in the volume of the bar is: (A) 1.125 cm3 (B) 2.125 cm3 (C) 3.125 cm3 (D) 4.125 cm

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Last Answer : (D) All the above 

A standard steel tape of length 30 m and cross-section 15 × 1.0 mm was standardised at 25°C and at 30 kg pull. While measuring a base line at the same temperature, the pull applied was 40 kg. If the modulus of elasticity of steel tape is 2.2 × 106 kg/cm2 , the correction to be applied is (A) - 0.000909 m (B) + 0.0909 m (C) 0.000909 m (D) None of these

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The Young's modulus of elasticity of steel, is (A) 150 KN/mm2 (B) 200 KN/mm2 (C) 250 KN/mm2 (D) 275 KN/mm

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(A) Absolute temperature (B) Temperature (C) Density (D) Modulus of elasticity

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A liquid compressed in cylinder has a volume of 0.04 m3 at 50 kg/cm² and a volume of 0.039 m3 at 150 kg/cm². The bulk modulus of elasticity of liquid is (A) 400 kg/cm² (B) 4000 kg/cm² (C) (D)

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For ultrasonic testing, which of the following statements is true? a) It is easy to identify all defects b) The equipment shall be calibrated before use c) The equipment cannot be automated d) Sound waves will not travel through copper

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Pick up the correct statement from the following: (A) Plain cement concrete is equally strong in compression as well as in tension (B) Slump test is performed to check concrete strength (C) Curing of concrete is done for proper compaction of cement (D) Fineness modulus is the index number expressing the relative sizes of both coarse and fine aggregates

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Red short iron cracks when bent due to the presence of (A) Sulphur (B) Carbon (C) Phosphorus (D) Silicon

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Last Answer : Answer: Option D

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Which of the following correspond to the recommendations of IRC for pavement thickness determination by CBR Method ? 1. CBR tests are to be conducted in-situ 2. Static compression is best adopted 3. The top 50 cm of sub grade should be compacted to as near the proctor density as possible (a) 1, 2 and 3 (b) 1 and 2 only (c) 2 and 3 only (d) 1 and 3 only

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Pick up the correct statements from the following: (A) Cracks appear on the plastered surface in the form of hair cracks (B) In brick work, the efflorescence is removed by applying a solution of zinc sulphate and water (C) Excessive thermal variations in the backing or plaster causes the plaster to fall (D) All the above

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Last Answer : Answer: Option D

In India, are prefabricated components costlier than those of traditional cast-in-situ items that the prefabricated components replace? (A) Yes, because of heavier overheads and handling cost (B) Yes, because of the very high order of quality control for the factory made components (C) No, because of repetitive manufacture of a number of elements (D) No, because of savings in site labour

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Last Answer : (C) No, because of repetitive manufacture of a number of elements

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Last Answer : c. Memorize immediate actions and refer to check list for subsequent actions

With regards to procedures, a pilot is advised to: a. Memorize all procedures as carefully as possible b. Memorize immediate actions and subsequent actions c. Memorize immediate actions and refer to check list for subsequent actions

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Last Answer : c. Memorize immediate actions and refer to check list for subsequent actions

At a work site, statistical quality control of concrete means (A) Measurement of risks to eliminate failures (B) Applying the theory' of probability to sample testing or inspection (C) Reduction in wastage of inspection costs (D) Reduction in costs for the removal of defects

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Last Answer : Users can directly assess the quality of information.

The purpose of transverse reinforcement, in a slab is to (a) Distribute the effect to f point load on the slab more evenly and uniformly (b) Distribute the shrinkage and temp cracks more ever (c) Keep the main reinforcement in position (d) All of the above.

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Last Answer : (d) All of the above.

If C is creep coefficient, f is original pre-stress in concrete, m is modular ratio, E is Young's modulus of steel and e is shrinkage strain, the combined effect of creep and shrinkage is: (A) (1 - C)mf - eEB) (C - 1)mf + eE(C) (C - 1)mf - eE(D) (1 - C)mf + eE

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Last Answer : Answer: Option B

Modulus of rupture of concrete is a measure of (A) Flexural tensile strength (B) Direct tensile strength (C) Compressive strength (D) Split tensile strength

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The modular ratio is the ration of (a) Young’s modulus of steel to the young’s modulus of concrete (b) Young’s modules of concrete to the young’s modulus of steel (c) Load carried by steel to the load carried by concrete. (d) Load carried by concrete to the load carried by step.

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Last Answer : (c) Load carried by steel to the load carried by concrete.