551. The condition that causes vapour locking in a brake system is
A. overheating of the fluid due to frequent brake application
B. overcooling of the brakes during high speed driving
C. keeping the vehicle without use for an extended period
D. an excessively high engine speed on a downhill road

552. The angle which an inclined plane makes with the horizontal when a body placed on it is about to move down is known as angle of __________________?
A. friction
B. limiting friction
C. repose
D. kinematic friction
E. static friction

553. y2 = 9/16 x2-36 is the equation of a 16
A.Cricle
B.Ellipse
C.Parabola
D.Hyperbola

554. In actual machines_____________________?
A. mechanical advantage is greater than velocity ratio
B. mechanical advantage is equal to velocity ratio
C. mechanical advantage is less than velocity ratio
D. mechanical advantage is unity
E. none of the above

555. A cable with a uniformly distributed load per horizontal metre run will take the following shape_________________?
A. straight line
B. parabola
C. hyperbola
D. elliptical
E. part of a circle

556. Which of the following is the example of lever of first order__________________?
A. arm of man
B. pair of scissors
C. pair of clinical tongs
D. all of the above
E. none of the above

557. The C.G. of a right circular solid cone of height h lies at the following distance from the base________________?
A. h/2
B. J/3
C. h/6
D. h/4
E. 3/i/5

558. An ideal fluid is
A. Similar to a perfect gas
B. Frictionless and incompressible
C. One which obeys Newton’s law of viscosity
D. One which satisfies continuity equation
E. One which flows through pipes with least friction

559. A flywheel on a motor goes from rest to 1000 rpm in 6 sec. The number of revolutions made is nearly equal to_________________?
A. 25
B. 50
C. 100
D. 250
E. 500

560. If n = number of members andy = number of joints, then for a perfect frame, n =________________?
A. j-2
B. 2j-l
C. 2/-3
C. 3/-2
E. 2/ -4

NOTE
IF YOU THINK ANY OF THE MCQ ABOVE IS WRONG.
PLEASE COMMENT WITH CORRECT ANSWER AND ITS DETAIL EXPLANATION IN COMMENT BOX.
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