
D52 FACE THE CHALLENGE
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Professional Development
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38 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Assertion (A): Concrete is strong in compression but weak in tension. Reason (R): Aggregates pull away from each other under compression causing cracks.
Answer explanation
Concrete's weakness in tension is due to separation of aggregates at the interfacial zone.
Aggregates pull away from each other under tension causing cracks.
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Assertion (A): Cast iron pipes are suitable for pressure lines. Reason (R): Cast iron pipes are weak in tensile stress and cannot handle high pressures.
Answer explanation
Cast iron pipes are strong in compression and are used for pressure lines. Reason is incorrect.
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A force of 100 N is applied to an object of mass 25 kg. What is the acceleration?
Answer explanation
Using Newton’s second law: a = F/m = 100/25 = 4 m/s²
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is the pressure exerted by a 500 N force on a surface of area 0.25 m²?
Answer explanation
Pressure = Force / Area = 500 / 0.25= 2000 N/m²
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which type of sleeper is most suitable for high-speed broad gauge tracks?
Answer explanation
Concrete sleepers are preferred for high-speed broad gauge due to stability and long life.
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which section is also known as ISMC in steel structures?
Answer explanation
ISMC refers to Indian Standard Medium Weight Channels (C-section).
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which sewer material is highly resistant to sulphide corrosion?
Answer explanation
Vitrified clay resists H₂S corrosion and has a smooth hydraulic surface.
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