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31.

Three different weights fall from a certain height under vacuum. They will take                        
A. same time to reach earth B. times proportional to weight to reach earth
C. times inversely proportional to weight to reach earth D. unpredictable



32.

When a bolt is subjected to shock loading, the resilience of the bolt should be considered in order to prevent breakage at                        
A. shank B. head
C. in the middle D. at the thread



33.

When a close coiled helical spring is compressed, its wire is subjected to                        
A. tension B. shear
C. compression D. all of the above




34.

When two springs are in series (having stiffness K), the equivalent stiffness will be                        
A. K B. K/2
C. 2K D. KIA



35.

Whether any core is required in wireropes                        
A. yes B. no
C. sometimes D. rarely



36.

Which of the following pipe joints would be suitable for pipes carrying steam                        
A. flanged B. threaded
C. bell and spigot D. expansion



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