The main constituent of bones is ______________________?
The main constituent of bones is ______________________?
A. CaF2
B. Ca3(PO4)2
C. CaCO3
D. CaCl2
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A material being tested for endurance strength is subjected to the _____________ load?
A material being tested for endurance strength is subjected to the _____________ load?A. Impact
B. Completely reversed
C. Dynamic
D. Static & dynamicA highly elastic material is deformed least on loading and retains its original form on removal of the load. Which of the following is the most elastic material?
Question: A highly elastic material is deformed least on loading and retains its original form on removal of the load. Which of the following is the most elastic material?
[A].Steel [B].
Glass [C].
Rubber [D].
Brass Answer: Option A
Explanation:
No answer description available for this question.
A solution which resists change in its pH value on addition of acid/alkali is called the __________ solution.
Question: A solution which resists change in its pH value on addition of acid/alkali is called the __________ solution.
[A].neutral [B].
ideal [C].
buffer [D].
zero pH Answer: Option C
Explanation:
No answer description available for this question.
Eutectoid composition of carbon steel at room temperature is
Question: Eutectoid composition of carbon steel at room temperature is
[A].cementite [B].
pearlite [C].
martensite [D].
ferrite Answer: Option B
Explanation:
No answer description available for this question.
In a counter flow heat exchanger, hot fluid enters at 170°C & leaves at 150°C, while the cold fluid enters at 50°C & leaves at 70°C. The arithmetic mean temperature difference in this case is ______________ °C?
In a counter flow heat exchanger, hot fluid enters at 170°C & leaves at 150°C, while the cold fluid enters at 50°C & leaves at 70°C. The arithmetic mean temperature difference in this case is ______________ °C?A. 20
B. 60
C. 120
D. ∞For a spontaneous natural process at constant temperature and pressure, the free energy of the system always____________________?
For a spontaneous natural process at constant temperature and pressure, the free energy of the system always____________________?A. Increases
B. Decreases
C. Remain constant
D. Increases to a maximum before decreasing