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Q: How can a valley loop test be used to locate fault?
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What is varley loop test?

A varley loop test is a test used to find the earth fault location in an underground cable. It uses the Wheatstone bridge to help determine the distance from the test point to a fault in a telephone or telegraph line or cable.


What is principle the Murray Loop Test?

A Murray Loop Test is used to locate faults in networks of cables such as three-phase services, groups of underground cables, etc. It works by using the principle equation on which the Wheatstone bridge is based: when the galvanometer is in a null condition, R1/R3=R2/R4. The location of a cable fault within a network can be found by using a process of elimination: good connections are identified and are then excluded from further iterations of the Murray Loop Test.


Why is the DO loop called a pre-test loop?

No reason. It is a post-test loop.


a for loop is a post test loop?

pre-test


What is the significance of test condition in a loop?

The test condition in a loop is what's used to determine when the loop should end.


Which loop specifically designed to initialize test and increment a counter?

A for loop.


What the difference between pretest loop and posttest loops?

The difference is that pre means before and post means after in Latin so it's tested before or after. :)


What are the advantages of Murray loop test compared to Varley loop test?

Murry for long underground cables test but varley usually for short distance.


Which loop is specifically designed to initiate test and increment a counter variable?

for loop


Is a for loop a post-test loop?

Yes. The second clause (the condition) is evaluated before each iteration through a loop. It is possible that a for loop will not execute if its precondition is not met. For example, "for( int x = 5; x < 5; x++ )" will not iterate even once.


What are the components of loop?

a loop consist of data initialization;test condition;updation; example a for loop for(int a=1;a<5;a++) the loop will be executed 5 times four positives result and the last test condition will be failed and the loop will be exited there are many loops some of them are while loop,do...while loop,for loop,maybe more...... do while is an exit check loop and while and for are entry check loop.


Definition and comments for loop?

The C and C++ for loop is defined as...for (init-expression; test-expression; loop-expression) loop-statement;The init-expression is executed once.At the top of the loop, test-expression is evaluated. If it is false, control passes to the statement following loop-statement.The loop-statement is executed. It may be one statement, it may be a block of statements, or it may be no statement. If it is no statement, the semi-colon is required.At the bottom of the loop, loop-expression is executed, and then control passes to the test-expression at the top of the loop for another go-around.Each of init-expression, test-expression, and loop-expression may be missing. The semi-colons are required. The formal "forever" loop is for (;;) loop-statement; in which case the only way out is the break statement.Since each of init-expression, test-expression, and loop-expression can have side-effects, sometimes a loop is constructed with no loop-statement, and all processing is done between the parentheses.If test-expression is initially false, loop-expression and loop-statement are never executed. The init-expression is always executed only one time, and test-expression is executed at least one time.At any point during loop-statement, the breakstatement will exit to the statement following loop-statement, and the continue statement will jump to the loop-expression at the bottom of the loop.