Mechanical - Practice Test

1. A hollow shaft of same cross-section area as solid shaft transmits
a. Same torque
b. Less torque
c. More torque
d. Unpredictable

2. In a cantilever beam, maximum deflection occurs at where
a. Bending moment is zero
b. Bending moment is maximum
c. Shear force is zero
d. Slope is zero

3. In a rectangular beam, when width, depth and length are doubled, the bending stress will be
a. Shall remain unchanged
b. Shall be doubled
c. Shall become � th
d. Shall be halved

4. In an I section beam, the bending moment is resisted mainly by
a. Flanges only
b. Web only
c. Both by flanges and web
d. None of the above

5. In internal combustion (I.C.) engines, combustion of fuel takes place in
a. Outside the cylinder
b. Inside the cylinder
c. Not in the cylinder
d. None of the above

6. Power available at the shaft of an I.C engine is known is
a. Brake horse power
b. Indicated horse power
c. Net indicated horse power
d. Pumping power

7. In internal combustion engine piston the maximum temperature occurs at
a. Ring section
b. Gungeon pin
c. Bottom centre
d. Top centre

8. A two-stroke engine is generally preferred to a four-stroke engine because
a. It offers low fuel consumption
b. It gives lesser shocks and vibrations
c. It can be easily started
d. It has smaller size for the same output.

9. During idling process, a petrol engine requires
a. Lean mixture
b. Rich mixture
c. Variable mixture
d. None of above

10. Cavitation in a pipe will begin when
a. Pressure at any location reaches pressure equal to the saturated vapour pressure of liquid
b. Pressure becomes more than critical pressure
c. Flow is increased
d. Pressure is increased

Answers:
1. b
2. a
3. c
4. b
5. b
6. a
7. a
8. d
9. a
10. a

Building Construction (Masonry)

Q.1.     The lengthy face of the brick is known as

(a)        face

(b)        king closer

(c)        queen closer

(d)        stretcher

Q.2.     Horizontal layer of bricks or stones is called

(a)        bed

(b)        course

(c)        quoin

(d)        none of these

Q.3.     External corners of the wall are called

(a)        frogs

(b)        bats

(c)        heartings

(d)        quoins

Q.4.     The part of the brick obtained by cutting the triangular corner portion from the middle points of width and length of brick is called

(a)        king closer

(b)        queen closer

(c)        stretcher

(d)        none of these

Q.5.     A king closer is a

(a)        full brick

(b)        3/4 brick

(c)        longitudinally 1/2 brick

(d)        crosswise 1/2 brick       (IES 2000)

Q.6.     A part of a brick obtained by cutting a brick longitudinally into two equal parts is called

(a)        king closer

(b)        queen closer

(c)        stretcher

(d)        bat

Q.7.     The brick half piece to its length is called

(a)        king closer

(b)        queen closer

(c)        stretcher

(d)        half bat

Q.8.     The original layers of stones along witch they have formed is called

(a)        bed

(b)        through bed

(c)        natural bed

(d)        none of these

Q.9.     A single stone which is fixed at regular intervals joining face and back is called

(a)        frog

(b)        through stone

(c)        natural stone

(d)        plinth course

Q.10.   Pieces of stones are called

(a)        ballast

(b)        spalls

(c)        crushed stone

(d)        none of these

Answers:

1. d
2. b
3. d
4. a
5. b
6. b
7. d
8. c
9. b
10. b

Building Construction (Foundation)

Q.1.     If a very important building is to be constructed on black cotton soil then ___ foundation should be used.

(a)        spread footing

(b)        strip footing

(c)        raft

(d)        grillage

Q.2.     A foundation may fail due to

(a)        change of strata

(b)        differential loading system

(c)        unsymmetrical loading system

(d)        all the above

Q.3.     A foundation fails if

(a)        sub-soil water level is dropped

(b)        there is a lateral pressure on the structure

(c)        there is unequal settlement of masonry

(d)        all these

Q.4.     In India __ % area is covered with black cotton soil.

(a)        10

(b)        20

(c)        30

(d)        40

Q.5.     Black cotton soil shows

(a)        high volumetric changes when subjected to moisture variation

(b)        swelling when come in contact with moisture

(c)        shrinking when moisture evaporates

(d)        all these

Q.6.     In black cotton soil, due to alternate swelling and shrinking in wet and dry cycles of season

(a)        differential movement of ground occurs

(b)        tensile and shear stresses occur in foundation

(c)        generates cracks in super structure

(d)        all these

Q.7.     In black cotton soils, safe bearing capacity of the soils is taken as

(a)        5 kg/cm²

(b)        2.5 to 3.0 kg/cm²

(c)        1 kg/cm2 to 1.5 kg/cm²

(d)        0.50 to 0.75 kg/cm²

Q.8.     In black cotton soil, the minimum depth of foundation should be

(a)        4 m below ground level

(b)        2 m below ground level

(c)        1 m below ground level

(d)        0.5 m below ground level

Q.9.     In black cotton soil which footing is suitable?

(a)        spread footing

(b)        RCC footing

(c)        both (a) and (b)

(d)        neither (a) nor (b)

Q.10.   In black cotton soil, the bottom of foundation trench should be filled with

(a)        sand

(b)        moorum

(c)        broken stone

(d)        any of these

Answers

1. c
2. d
3. d
4. b
5. d
6. d
7. d
8. b
9. b
10. d

Material Science (Practice Test)

1. Ductility of a material can be defined as

(a) ability to undergo large permanent deformations in compression

(b) ability to recover its original form

(c) ability to undergo large permanent deformations in tension

(d) all of the above

(e) none of the above.

2. Malleability of a material can be defined as

(a) ability to undergo large permanent deformations in compression

(b) ability to recover its original form

(c) ability to undergo large permanent deformations in tension

(d) all of the above

(e) none of the above.

3. In compression, a prism of brittle material will break

(a) by forming a bulge (l>) by shearing along oblique plane

(c) in direction perpendicular to application of load

(d) by crushing into thousands of pieces

(e) none of the above.

4. The ability of a material to resist softening at high temperature is known as

(a) creep

(b) hot tempering

(c) hot hardness

(d) fatigue

(e) super hardening.

5. Mild steel belongs to the following category

(a) low carbon steel

(b) medium carbon steel

(c) high carbon steel

(d) alloy steel

(e) special steel.

6. The ultimate tensile strength of low carbon steel by working at a high strain rate will (a) decrease

(b) increase

(c) remain constant

(d) first increase and then decrease

(e) first decrease and then increase.

7. Slow plastic defoliation of metals under a constant stress is known as

(a) creep

(b) fatigue

(c) endurance

(d) plastic deformation

(e) non-plastic deformation.

8. The ultimate tensile strength and yield strength of most of the metals, when temperature

falls from 0 to l00�C will

(a) increase

(b) decrease

(c) remain same

(d) first increase and then decrease

(e) show unpredictable behaviour.

9. The number of electrons in 1 cm³of metal would be of the order of

(a) 10¹⁰

(b)10¹⁰

(c) 10²²

(d) 10⁴⁰

(e) 10⁵²

10. Stress relaxation is- the phenomenon

(a) in which parts are not loaded

(b) in which stress remains constant on increasing load

(c) in which deformation tends to loosen the joint and produces a stress reduced

(d) stress reduces on increasing load

(e) none of the above.

Answer:

1. c
2. a
3. b
4. c
5. a
6. b
7. a
8. a
9. c
10. c

Building Construction (Foundation)

Q.1.     Reinforced concrete footing

(a)        is used for soils with low bearing capacity

(b)        is used for soils with high bearing capacity

(c)        is used for black cotton soils

(d)        none of the above

Q.2.     In reinforced concrete footing RCC concrete bed is provided

(a)        at the bottom of spread footing

(b)        below lean concrete bed

(c)        instead of lean concrete

(d)        both (a) and (c)

Q.3.     Rolled steels joists are provided in

(a)        Spread footing foundation

(b)        RCC footing foundation

(c)        Grillage foundation

(d)        Raft foundation

Q.4.     Raft foundation is

(a)        very costly

(b)        used in low bearing capacity soils

(c)        suitable for black cotton soil

(d)        all the above

Q.5.     In raft foundation

(a)        covers entire structure like a floor

(b)        raft slab is reinforced in the form of square mesh at the bottom

(c)        some times inverted beams are provided in the raft slab

(d)        all the above

Q.6.     The load per unit area which the soil can support without yielding or displacement, is called

(a)        safe bearing capacity of soil

(b)        bearing capacity of soil

(c)        strength of foundation

(d)        none of these

Q.7.     Bearing capacity of the soil can be increased by

(a)        increasing depth of foundation

(b)        blending soil with granular material and ramming thereafter

(c)        stabilizing the soil

(d)        all the above

  Q.8.   In water logged area, by draining the soil, bearing capacity of the soil

(a)        decreases

(b)        increases

(c)        remains unchanged

(d)        none of these

Q.9.     According to IS: 1904 - 1966, maximum safe bearing capacity for coarse sand, medium sand and fine sand are respectively(in kg/cm²)

(a)        4.5, 2.5, 1.5

(b)        33, 16.5, 9

(c)        16.5, 9.0, 4.5

(d)        none of these

Q.10.   In above question, safe bearing capacity for medium clay, sand-clay mixture, and soft clay are respectively(in kg/cm²)

(a)        2.5, 1.5, 1.0

(b)        3.5, 1.5, 1.0

(c)        4.5, 2.5, 1.5

(d)        none of these

Answers:

1. a
2. d
3. c
4. d
5. d
6. b
7. d
8. b
9. a
10. a