civil engineering MCQs – Page 274

Practise multiple-choice questions from civil engineering for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

civil engineering Mcqs
5461. The coefficient of friction depends on_________________?
comments icon0

A. area of contact

B. all of the above

C. shape of surfaces

D. nature of surface

E. strength of surfaces

5462. The algebraic sum of the resolved parts of a number of forces in a given direction is equal to the resolved part of their resultant in the same direction. This is as per the principle of__________________?
comments icon0

A. independence of forces

B. forces

C. balance of force

D. resolution of forces

E. dependence of forces

5463. The C.G. of a plane lamina will not be at its geometrical centre in the case of a______________?
comments icon0
A. right angled triangle

B. square

C. rectangle

D. circle

E. equilateral triangle

5464. The ratio of limiting friction and normal reaction is known as_______________?
comments icon0

A. angle of friction

B. coefficient of friction

C. sliding friction

D. friction resistance

E. angle of repose

5465. Frictional force encountered after commencement of motion is called________________?
comments icon0

A. limiting friction

B. frictional resistance

C. post friction

D. dynamic friction

E. kinematic friction

5466. The unit of force in S.I. units is_________________?
comments icon0

A. joule

B. kilogram

C. newton

D. dyne

E. watt

5467. The maximum frictional force which comes into play when a body just begins to slide over another surface is called_____________________?
comments icon0
A. limiting friction

B. kinematic friction

C. dynamic friction

D. sliding friction

E. rolling friction

5468. The center of percussion of the homogeneous rod of length L suspended at the top will be__________________?
comments icon0
A. 2L/3

B. 3L/4

C. L/3

D. L/2

E. 3L/8

5469. The effort required to lift a load W on a screw jack with helix angle a and angle of friction <j) is equal to_________________?
comments icon0

A. Wcos(a + )

B. Wsin(a + )

C. Wtan(a-)

D. W (sin a + cos )

E. Wtan(a + )
5470. A heavy ladder resting on floor and against a vertical wall may not be in equilibrium, if______________?
comments icon0

A. the floor is smooth, the wall is rough

B. the floor is rough, the wall is smooth

C. the floor and wall both are smooth surfaces

D. the floor and wall both are rough sur-faces

E. will be in equilibrium under all condi-tions

5471. Pick up wrong statement about friction force for dry surfaces. Friction force is________________?
comments icon0
A. proportional to velocity of sliding

B. none of the above is wrong statement

C. proportional to normal load between the surfaces

D. independent of the area of contact surfaces

E. dependent on the materials of contact surface

5472. The units of moment of inertia of mass are_____________________?
comments icon0

A. m2/kg

B. kg/m

C. kg/m2

D. kg m2

E. m4

5473. Which of the following is not the unit of pressure ?
comments icon0

A. atmosphere

B. kg/cm

C. ata

D. newton

E. mm of wcl

5474. A flywheel on a motor goes from rest to 1000 rpm in 6 sec. The number of revolutions made is nearly equal to______________?
comments icon0

A. 100

B. 50

C. 500

D. 250

E. 25

5475. On the ladder resting on the ground and leaning against a smooth vertical wall, the force of friction will be__________________?
comments icon0

A. downwards at its upper end

B. zero at its upper end

C. upwards at its upper end

D. perpendicular to the wall at its upper end

E. none of the above

5476. The necessary condition for forces to be in equilibrium is that these should be_______________?
comments icon0

A. coplanar

B. meet at one point ;

C. both A. and B. above

D. all be equal

E. something else

5477. A particle inside a hollow sphere of radius r, having coefficient of friction -rr can rest upto height of__________________?
comments icon0

A. r/A

B. 0.134 r

C. 3r/8

D. r/2

E. r/%

5478. The unit of work or energy in S.I. units is________________?
comments icon0
A. joule

B. newton

C. pascal

D. kilogram meter

E. watt

5479. When trying to turn a key into a lock, following is applied___________________?
comments icon0

A. non-coplanar forces

B. moment

C. lever

D. coplanar force

E. couple
5480. The resultant of the following three couples 20 kg force, 0.5 m arm, $ ve sense 30 kg force, 1 m arm, ve sense 40 kg force, 0.25 m arm, + ve sense having arm of 0.5 m will be_________________?
comments icon0

A. 10 kg, + ve sense

B. 20 kg, ve sense

C. 45 kg, + ve sense

D. 20 kg, + ve sense

E. 10 kg, ve sense