Related Questions

While designing a screw in a screw jack against buckling failure, the end conditions for the screw are taken as
A both ends fixed
B both ends hinged
C one end fixed and other end hinged
D one end fixed and other end free.
John, Jack, Joseph and Jordan participated in a running race. Only the winner finished the race in 10 minutes. Which two pieces of information can tell you who the winner was? (i) John finished the race in 16 minutes . (ii) Joseph finished the race earlier than Jack by 2 minutes. (iii) Jack finished the race later than Jordan by 4 minutes. (iv) Jordan finished the race earlier than John by 6 minutes. (v) John finished the race later than Joseph by minutes.
A I and II
B I and IV
C II and III
D II and V
When the screw in a mechanical screw jack rotates, the load kept on the top of it moves
A Axially upwards
B Axially downwards
C Axially upwards or downwards
D None of these
Jack is taller than Peter,and Bill is shorter than Jack.Which of the following statements would be most accurate?
A Bill is taller than Peter
B Bill is shorter than Peter
C Bill is as tall as Peter
D It is impossible to tell whether Bill or Peter is taller
Jack has b blueberries. He uses 30 percent of the blueberries to make muffins , each of which requires m blueberries. He uses the rest of the rest of the blueberries to make pies, each pie of which retires p blueberries. which of the following describes the number of blueberry pies Jack can make ?
A 3b/10m
B 3b/10p
C 7b/10m
D 7b/10p
Shiplu is heavier than Shajib. Mohit is Lighter than Jack. Jamil is heavier than Jack but lighter than Shajib,. Who is the heaviest ?
A Shajib
B Jack
C Jamil
D Shiplu
Bob and Jack share an apartment. If each month Bob pays a dollars and Jack pays b dollars, what percent of the total cost does Bob pay?
A ab%
B ba%
C aa+b%
D 100aa+b%
The rated loads of lifting cranes, as percentage of tipping load at specified radius, for crawler-mounted and pneumatic tyre-mounted machines would be respectively
A 80 and 90
B 90 and 80
C 85 and 75
D 75 and 83
The maximum efficiency of a screw jack is
A 1 – sinφ/ 1 + sinφ
B 1 + sinφ/ 1 – sinφ
C 1 – tanφ/ 1 + tanφ
D 1 + tanφ/ 1 – tanφ
The load cup of a screw jack is made separate from the head of the spindle to
A enhance the load carrying capacity of the jack
B reduce the effort needed for lifting the working load
C reduce the value of frictional torque required to be countered for lifting the load
D prevent the rotation of load being lifted

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