OBJECTIVE QUESTIONS (ENGINEERING) 1. The virgin compression curve for a particular soil is shown in the given figure. The compression index of the soil is (a) 0.35 (b) 0.50 (c) 1.0 (d) 1.5 (IES 1994) Hint: 2. When a stress is applied to a saturated soil, its volume reduces and effective stress (a) decreases (b) increases (c) remains unaltered (d) first decreases then increases

3.

MATERIAL SCIENCE

Electronic components which are made of a semiconductor material are often called. ⸺ devices. (d) intrinsic. 9. Any voltage that is connected across a P-N junction is called ⸺ voltage. (d) reverse. 10. The area within a semiconductor diode where no mobile current carriers exist when it is. formed is called ⸺ region. ELECTRICAL MACHINES (ALTERNATORS) Electrical Machines (Alternators) 1. When speed of an alternator is changed from 3600 r.p.m. to 1800 r.p.m., the generated. (d) one-fourth. 2. The magnitude of the three voltage drops in an alternator due to armature resistance, leakage reactance and armature reaction is solely determined by. (d) field construction of the

alternator. 3.

ELECTRICAL MACHINES

Electrical Machines (Special Machines) 1. A single-stack, 4-phase, 6-pole VR stepper motor will have a step angle of (a) 15º (b) 30º (c) 45º (d) 90º 2. In a three-stack 12/8-pole VR motor, the rotor pole pitch is (a) 15º (b) 30º (c) 45º (d) 60º 3. A three-stack VR stepper motor has a step angle of 10º. MATERIAL SCIENCE QUIZ (POLYMERS) Q. 1. For a solid or a hollow shaft subject to a twisting moment T, the torsional shearing stress t at a distance r from the centre will be (a) t = Tr/J (b) t = Tr (c) t = TJ/r (d) none of these where J is second moment of area. OBJECTIVE QUESTIONS (ENGINEERING) December 14, 2012. Q.1. The percentage of tricalcium aluminates in sulphate resisting cement is (a) more than 6% (b) less than 6% (c) more than 16% (d) less than 16% Q.2. Sulphate resisting cement is useful in structures (a) in river waters (b) sea waters (c) in cold environment (d) in hot environment Q.3. MATERIAL SCIENCE QUIZ (IMPERFECTION OF SOLIDS) Material Science Quiz (Imperfection of Solids) 1. Theoretical strength is about __________ times to average real strength of a material. 2. Hooke’s law. 3. Following is not the 2-dimensional imperfection. 4. Figure out the odd one in the following. MATERIAL SCIENCE QUIZ (MECHANICAL PROPERTIES OF METALS) Material Science Quiz (Mechanical Properties of Metals) 1. Time dependent permanent deformation is called ________________. 2. Figure-out the odd point in the following. 3. If a material is subjected to two incremental true strains namely ε1 and ε2, then the total true strain is. 4. ELECTRICAL MACHINES (GENERATOR CHARACTERISTICS) Electrical Machines (Generator Characteristics) 1. The external characteristic of a shunt generator can be obtained directly from its —— characteristic. 2. Load saturation characteristic of a d.c. generator gives relation between. 3. The slight curvature at the lower end of the O.C.C. of a self-excited d.c. generator is due to.

SOIL MECHANICS

Soil Mechanics - Classification of Soils. Q.1. Soils transmitted by the wind are called. Q.2. A fine-grained soil transported by water and deposited at the bottom of the lake is. Q.3. Match List I with List II and select the correct answer using the codes given below the lists: 1. Transportation by the wind. OBJECTIVE QUESTIONS (ENGINEERING) 1. The virgin compression curve for a particular soil is shown in the given figure. The compression index of the soil is (a) 0.35 (b) 0.50 (c) 1.0 (d) 1.5 (IES 1994) Hint: 2. When a stress is applied to a saturated soil, its volume reduces and effective stress (a) decreases (b) increases (c) remains unaltered (d) first decreases then increases

3.

MATERIAL SCIENCE

Electronic components which are made of a semiconductor material are often called. ⸺ devices. (d) intrinsic. 9. Any voltage that is connected across a P-N junction is called ⸺ voltage. (d) reverse. 10. The area within a semiconductor diode where no mobile current carriers exist when it is. formed is called ⸺ region. ELECTRICAL MACHINES (ALTERNATORS) Electrical Machines (Alternators) 1. When speed of an alternator is changed from 3600 r.p.m. to 1800 r.p.m., the generated. (d) one-fourth. 2. The magnitude of the three voltage drops in an alternator due to armature resistance, leakage reactance and armature reaction is solely determined by. (d) field construction of the

alternator. 3.

ELECTRICAL MACHINES

Electrical Machines (Special Machines) 1. A single-stack, 4-phase, 6-pole VR stepper motor will have a step angle of (a) 15º (b) 30º (c) 45º (d) 90º 2. In a three-stack 12/8-pole VR motor, the rotor pole pitch is (a) 15º (b) 30º (c) 45º (d) 60º 3. A three-stack VR stepper motor has a step angle of 10º. MATERIAL SCIENCE QUIZ (POLYMERS) Q. 1. For a solid or a hollow shaft subject to a twisting moment T, the torsional shearing stress t at a distance r from the centre will be (a) t = Tr/J (b) t = Tr (c) t = TJ/r (d) none of these where J is second moment of area. OBJECTIVE QUESTIONS (ENGINEERING) December 14, 2012. Q.1. The percentage of tricalcium aluminates in sulphate resisting cement is (a) more than 6% (b) less than 6% (c) more than 16% (d) less than 16% Q.2. Sulphate resisting cement is useful in structures (a) in river waters (b) sea waters (c) in cold environment (d) in hot environment Q.3. MATERIAL SCIENCE QUIZ (IMPERFECTION OF SOLIDS) Material Science Quiz (Imperfection of Solids) 1. Theoretical strength is about __________ times to average real strength of a material. 2. Hooke’s law. 3. Following is not the 2-dimensional imperfection. 4. Figure out the odd one in the following. MATERIAL SCIENCE QUIZ (MECHANICAL PROPERTIES OF METALS) Material Science Quiz (Mechanical Properties of Metals) 1. Time dependent permanent deformation is called ________________. 2. Figure-out the odd point in the following. 3. If a material is subjected to two incremental true strains namely ε1 and ε2, then the total true strain is. 4. ELECTRICAL MACHINES (GENERATOR CHARACTERISTICS) Electrical Machines (Generator Characteristics) 1. The external characteristic of a shunt generator can be obtained directly from its —— characteristic. 2. Load saturation characteristic of a d.c. generator gives relation between. 3. The slight curvature at the lower end of the O.C.C. of a self-excited d.c. generator is due to.

SOIL MECHANICS

Soil Mechanics - Classification of Soils. Q.1. Soils transmitted by the wind are called. Q.2. A fine-grained soil transported by water and deposited at the bottom of the lake is. Q.3. Match List I with List II and select the correct answer using the codes given below the lists: 1. Transportation by the wind. OBJECTIVE QUESTIONS (ENGINEERING) 1. The virgin compression curve for a particular soil is shown in the given figure. The compression index of the soil is (a) 0.35 (b) 0.50 (c) 1.0 (d) 1.5 (IES 1994) Hint: 2. When a stress is applied to a saturated soil, its volume reduces and effective stress (a) decreases (b) increases (c) remains unaltered (d) first decreases then increases

3.

OBJECTIVE QUESTIONS (ENGINEERING) October 29, 2020. 1. Escape of pore water from a soil is very quick. The soil would be (a) clay (b) peat (c) silt (d) sand 2. Escape of pore water from a soil is very slow. The soil would be (a) clay (b) peat (c) silt (d) sand 3. When a soil is stressed to a level greater than the maximum stress to which it was ever subjected in the past

then

OBJECTIVE QUESTIONS (ENGINEERING) December 14, 2012. Q.1. The percentage of tricalcium aluminates in sulphate resisting cement is (a) more than 6% (b) less than 6% (c) more than 16% (d) less than 16% Q.2. Sulphate resisting cement is useful in structures (a) in river waters (b) sea waters (c) in cold environment (d) in hot environment Q.3. THERMODYNAMICS (COMPRESSIBLE FLOW) Thermodynamics (Compressible Flow) 1. All real fluids are. (d) none of the above. 2. A change in the state of a system at constant volume is called. (d) adiabatic process. 3. A process during which no heat is transferred to or from the gas is called an. THERMODYNAMICS (FUELS AND COMBUSTIONS) 8. The Orsat apparatus gives. (a) volumetric analysis of the dry products of combustion. (b) gravimetric analysis of the dry products of combustion. (c) gravimetric analysis of products of combustion including H2O. (d) volumetric analysis of products of combustion including H2O. 9. In the Orsat apparatus KOH solution is used to

absorb.

ELECTRICAL MACHINES (D.C. GENERATORS) 8. The sole purpose of a commutator in a d.c. Generator is to. (a) increase output voltage. (b) reduce sparking at brushes. (c) provide smoother output. (d) convert the induced a.c. into d.c. 9. For a 4-pole, 2-layer, d.c., lap-winding with 20 slots and one conductor per STRENGTH OF MATERIALS (TORSION OF SHAFTS) Strength of Materials (Torsion of Shafts) Q.1. For a solid or a hollow shaft subject to a twisting moment T, the torsional shearing stress t at a distance r from the centre will be. where J is second moment of area. Q.2. A hollow prismatic beam of circular section is subjected to a torsional moment. The maximum shear stress occurs at. ELECTRICAL MACHINES (SYNCHRONOUS MACHINES) Q. 1. For a solid or a hollow shaft subject to a twisting moment T, the torsional shearing stress t at a distance r from the centre will be (a) t = Tr/J (b) t = Tr (c) t = TJ/r (d) none of these where J is second moment of area.

SOIL MECHANICS

Soil Mechanics - Basic Concepts. Q.1. In a soil sample, at a certain point, there is no reduction in volume even by reducing water content. Water content at this point is called. Q.2. In a soil sample, at a certain point, there is no reduction in volume even by reducing water content. In this situation, space left behind due to reduction of

MATERIAL SCIENCE

Material Science - Semiconductor Physics. 1. The total energy of a revolving electron in an atom can. (d) not be calculated. 2. An atom is said to be ionised when any one of its orbiting electron. (d) is completely removed. 3. The maximum number of electrons which the M OBJECTIVE QUESTIONS (ENGINEERING) 1. The virgin compression curve for a particular soil is shown in the given figure. The compression index of the soil is (a) 0.35 (b) 0.50 (c) 1.0 (d) 1.5 (IES 1994) Hint: 2. When a stress is applied to a saturated soil, its volume reduces and effective stress (a) decreases (b) increases (c) remains unaltered (d) first decreases then increases

3.

THERMODYNAMICS (FUELS AND COMBUSTIONS) 8. The Orsat apparatus gives. (a) volumetric analysis of the dry products of combustion. (b) gravimetric analysis of the dry products of combustion. (c) gravimetric analysis of products of combustion including H2O. (d) volumetric analysis of products of combustion including H2O. 9. In the Orsat apparatus KOH solution is used to

absorb.

ELECTRICAL MACHINES

1. In an unsaturated air the state of a vapour is (a) wet (b) superheated (c) saturated (d) unsaturated. 2. For saturated air (a) Wet bulb depression is zero (b) Wet bulb depression is positive (c) Wet bulb depression is negative (d) Wet bulb depression can be either positive or negative. ELECTRICAL MACHINES (SPECIAL MACHINES) Electrical Machines (Special Machines) 1. A single-stack, 4-phase, 6-pole VR stepper motor will have a step angle of. 2. In a three-stack 12/8-pole VR motor, the rotor pole pitch is. 3. A three-stack VR stepper motor has a step angle of 10º. MATERIAL SCIENCE (CERAMICS) The following ceramic product is mostly used as pigment in paints. (a) TiO2 (b) SiO2 (c) UO2 (d) ZrO2. 6. Most commercial glasses consist of. (a) lime (b) soda (c) silica (d) all. 7. Hot isostatic pressing is not a viable option if the chief criterion is. (a) strength without grain growth (b) lost cost.

MATERIAL SCIENCE

Material Science - Oxidation and Corrosion. 1. Which one is the wrong anode-cathode combination. 2. The metals which do not form adherent oxide film on surface are. 3. Which of the following elements added to iron to improve its oxidation resistance. 4. The corrosion by the mechanism of oxygen absorption can occur if. ELECTRICAL MACHINES (D.C. MOTOR) The mechanical power developed by the armature of a d.c. motor is equal to. (a) armature current multiplied by back e.m.f. (b) power input minus losses. (c) power output multiplied by efficiency. (d) power output plus iron losses. 6. The induced e.m.f. ELECTRICAL MACHINES (GENERATOR CHARACTERISTICS) Electrical Machines (Generator Characteristics) 1. The external characteristic of a shunt generator can be obtained directly from its —— characteristic. 2. Load saturation characteristic of a d.c. generator gives relation between. 3. The slight curvature at the lower end of the O.C.C. of a self-excited d.c. generator is due to. STRENGTH OF MATERIALS (TORSION OF SHAFTS) Strength of Materials (Torsion of Shafts) Q.1. For a solid or a hollow shaft subject to a twisting moment T, the torsional shearing stress t at a distance r from the centre will be. where J is second moment of area. Q.2. A hollow prismatic beam of circular section is subjected to a torsional moment. The maximum shear stress occurs at. THERMODYNAMICS (COMPRESSIBLE FLOW) Thermodynamics (Compressible Flow) 1. All real fluids are. (d) none of the above. 2. A change in the state of a system at constant volume is called. (d) adiabatic process. 3. A process during which no heat is transferred to or from the gas is called an. OBJECTIVE QUESTIONS (ENGINEERING) 1. The virgin compression curve for a particular soil is shown in the given figure. The compression index of the soil is (a) 0.35 (b) 0.50 (c) 1.0 (d) 1.5 (IES 1994) Hint: 2. When a stress is applied to a saturated soil, its volume reduces and effective stress (a) decreases (b) increases (c) remains unaltered (d) first decreases then increases

3.

THERMODYNAMICS (FUELS AND COMBUSTIONS) 8. The Orsat apparatus gives. (a) volumetric analysis of the dry products of combustion. (b) gravimetric analysis of the dry products of combustion. (c) gravimetric analysis of products of combustion including H2O. (d) volumetric analysis of products of combustion including H2O. 9. In the Orsat apparatus KOH solution is used to

absorb.

ELECTRICAL MACHINES

1. In an unsaturated air the state of a vapour is (a) wet (b) superheated (c) saturated (d) unsaturated. 2. For saturated air (a) Wet bulb depression is zero (b) Wet bulb depression is positive (c) Wet bulb depression is negative (d) Wet bulb depression can be either positive or negative. ELECTRICAL MACHINES (SPECIAL MACHINES) Electrical Machines (Special Machines) 1. A single-stack, 4-phase, 6-pole VR stepper motor will have a step angle of. 2. In a three-stack 12/8-pole VR motor, the rotor pole pitch is. 3. A three-stack VR stepper motor has a step angle of 10º. MATERIAL SCIENCE (CERAMICS) The following ceramic product is mostly used as pigment in paints. (a) TiO2 (b) SiO2 (c) UO2 (d) ZrO2. 6. Most commercial glasses consist of. (a) lime (b) soda (c) silica (d) all. 7. Hot isostatic pressing is not a viable option if the chief criterion is. (a) strength without grain growth (b) lost cost.

MATERIAL SCIENCE

Material Science - Oxidation and Corrosion. 1. Which one is the wrong anode-cathode combination. 2. The metals which do not form adherent oxide film on surface are. 3. Which of the following elements added to iron to improve its oxidation resistance. 4. The corrosion by the mechanism of oxygen absorption can occur if. ELECTRICAL MACHINES (D.C. MOTOR) The mechanical power developed by the armature of a d.c. motor is equal to. (a) armature current multiplied by back e.m.f. (b) power input minus losses. (c) power output multiplied by efficiency. (d) power output plus iron losses. 6. The induced e.m.f. ELECTRICAL MACHINES (GENERATOR CHARACTERISTICS) Electrical Machines (Generator Characteristics) 1. The external characteristic of a shunt generator can be obtained directly from its —— characteristic. 2. Load saturation characteristic of a d.c. generator gives relation between. 3. The slight curvature at the lower end of the O.C.C. of a self-excited d.c. generator is due to. THERMODYNAMICS (COMPRESSIBLE FLOW) Thermodynamics (Compressible Flow) 1. All real fluids are. (d) none of the above. 2. A change in the state of a system at constant volume is called. (d) adiabatic process. 3. A process during which no heat is transferred to or from the gas is called an. STRENGTH OF MATERIALS (TORSION OF SHAFTS) Strength of Materials (Torsion of Shafts) Q.1. For a solid or a hollow shaft subject to a twisting moment T, the torsional shearing stress t at a distance r from the centre will be. where J is second moment of area. Q.2. A hollow prismatic beam of circular section is subjected to a torsional moment. The maximum shear stress occurs at. OBJECTIVE QUESTIONS (ENGINEERING) 1. The virgin compression curve for a particular soil is shown in the given figure. The compression index of the soil is (a) 0.35 (b) 0.50 (c) 1.0 (d) 1.5 (IES 1994) Hint: 2. When a stress is applied to a saturated soil, its volume reduces and effective stress (a) decreases (b) increases (c) remains unaltered (d) first decreases then increases

3.

MATERIAL SCIENCE

Electronic components which are made of a semiconductor material are often called. ⸺ devices. (d) intrinsic. 9. Any voltage that is connected across a P-N junction is called ⸺ voltage. (d) reverse. 10. The area within a semiconductor diode where no mobile current carriers exist when it is. formed is called ⸺ region. ELECTRICAL MACHINES (D.C. MOTOR) The mechanical power developed by the armature of a d.c. motor is equal to. (a) armature current multiplied by back e.m.f. (b) power input minus losses. (c) power output multiplied by efficiency. (d) power output plus iron losses. 6. The induced e.m.f. in the armature conductors of a d.c. motor STRENGTH OF MATERIALS (TORSION OF SHAFTS) Strength of Materials (Torsion of Shafts) Q.1. For a solid or a hollow shaft subject to a twisting moment T, the torsional shearing stress t at a distance r from the centre will be. where J is second moment of area. Q.2. A hollow prismatic beam of circular section is subjected to a torsional moment. The maximum shear stress occurs at. MATERIAL SCIENCE QUIZ (IMPERFECTION OF SOLIDS) Material Science Quiz (Imperfection of Solids) 1. Theoretical strength is about __________ times to average real strength of a material. 2. Hooke’s law. 3. Following is not the 2-dimensional imperfection. 4. Figure out the odd one in the following.

SOIL MECHANICS

Thermodynamics (Psychrometrics) 1. In an unsaturated air the state of a vapour is (a) wet (b) superheated (c) saturated (d) unsaturated. 2. For saturated air (a) Wet bulb depression is zero (b) Wet bulb depression is positive (c) Wet bulb depression is negative (d) Wet bulb depression can be either positive or negative. STRENGTH OF MATERIALS (STRESSES & STRAINS) Strength of Materials (Stresses & Strains) Q.1. The work done on a unit volume of material, as simple tensile force is gradually increased from zero to a value causing rupture, is called. Q.2. The unit of modulus of resilience is. Q.3. BUILDING MATERIALS (CEMENT) Building Materials (Cement) Q.1. Tube mill is used in. Q.2. In the dry process of cement manufacturing, raw material is first crushed to a size of about. Q.3. In the dry process, finely grounded cement passes to. Q.4. Match List I with List II. BUILDING MATERIALS (CEMENT) Building Materials (Cement) Q.1. The rate of setting of cement is directly proportional to the temperature upto. Q.2. In the wet process of cement manufacturing, raw material is fed into the kiln in the form of. Q.3. In the wet process of cement manufacturing raw material is heated to about. Q.4.

SOIL MECHANICS

Soil Mechanics - Basic Concepts. Q.1. If a soil sample of weight 0.18 kg having a volume of and dry unit weight of 1600 kg/ is mixed with 0.02 kg of water then the water content in the sample will be. Q.2. The void ratio and specific gravity of a soil are 0.65 and 2.72 respectively. The degree of saturation in % corresponding to water

content is.

OBJECTIVE QUESTIONS (ENGINEERING) Objective Questions (MCQ) for GATE, IES, AMIE and Recruitment Exams

PAGES

* Home

* Basic Courses

* Civil

* Electrical

* Mechanical

* Subscribe

SEARCH THIS BLOG

MONDAY, AUGUST 19, 2019 STEEL STRUCTURES - RIVETED CONNECTIONS Q.1. According to IS:800-1984 minimum pitch for nominal dia of  12 mm, 18 mm, 22 mm, and 30 mm rivets are respectively (in mm) (a) 2.5 times the diameter of rivet hole

(b) 24, 36, 44, 60

(c) 6, 9, 11, 15

(d) none of these

Q.2. According to IS : 800-1984, maximum pitch for any two adjacent

rivets is

(a) 32t

(b) 300 mm

(c) lesser of (a) and (b) (d) greater of (a) and (b) where t is thickness of thinner outside plate Q.3. When the edge distance of a rivet or bolt in the direction of force it bears is less than 2 x effective diameter of rivet or bolt, then permissible bearing stress of that rivet or bolt on connected part shall be reduced by (a) actual edge distance divided by effective diameter of rivet/hole (b) actual edge distance divided by 2 x effective diameter of

rivet/hole

(c) actual edge distance divided by 3 x effective diameter of

rivet/hole

(d) none of these

Q.4. Rivet holes may cause (a) tearing of plate (b) shearing of plate (c) bearing of plate

(d) edge cracking

Q.5. If minimum edge distance is not provided then ____ may occur (a) tearing of plate (b) shearing of plate (c) bearing of plate

(d) edge cracking

Q.6. The plate or rivet is crushed if (a) compressive stress > bearing strength of plate (b) compressive stress > bearing strength of rivet (c) both (a) and (b)

(d) none of these

Q.7. In a rivet joint, strength of joint is taken as (a) smaller of strength of plate between rivet holes in tension and

rivet value

(b) greater value of strength of plate between rivet holes in tension

and rivet value

(c) smaller of strength of plate between rivet holes in compression

and rivet value

(d) greater value of strength of plate between rivet holes in compression and rivet value Q.8. Smaller value  of bearing strength and shearing strength of

rivet is called

(a) strength of joint

(b) rivet value

(c) bearing strength of rivet (d) shearing strength of rivet Q.9. A single riveted lap joint fails due to

1. tearing

2. bearing

3. shear

(a) 1, 2

(b) 2, 3

(c) 1, 3

(d) 1,2, 3 (IES 1992) Q.10. If the pitch is p in a riveted joint then strength of plate between rivet holes in tension is

(a) σat x d x t

(b) σat x p x t

(c) σat x (p - d) x t

(d) none of these

where σat is allowable tensile stress in an axially loaded tension member, d is effective diameter and t is thickness of thinner part which is thickness of main plate or total thickness of cover plates, whichever is smaller. Q.11. Bearing strength of a rivet is (a) σat x (p - d) x t

(b) σpf x d x t

(c) σp x d x t

(d) smaller of (b) and (c) where σpf is allowable bearing stress in rivets and σp is allowable bearing stress in member. Q.12. Shearing strength of rivet in double shear is

(a)

(b)

(c)

(d) none of these

where τvf is allowable shear stress in the rivets. Q.13. According to IS: 1367-1967, maximum permissible axial, shear, and bearing stresses in rivets and bolts (power driven shop rivets) are respectively (in MPa)

(a) 150, 150, 300

(b) 125, 125, 250

(c) 100, 100, 200

(d) 100, 100, 300

Q.14. In above question, values of permissible stresses for power driven field rivets are (in MPa)

(a) 150, 150, 300

(b) 125, 125, 250

(c) 90, 90, 180

(d) 90, 90, 270

Q.15. In above question, values of permissible stresses for hand

driven rivets are

(a) 90, 90, 180

(b) 90, 90, 270

(c) 80, 80, 240

(d) 80, 80, 250

Q.16. If the effect of wind and earthquake load is taken into account then permissible stress in rivet/bolt is increased by

(a) 10%

(b) 20%

(c) 25%

(d) 33%

Q.17. Maximum bearing stress for connected part as per IS: 226:1975, when the fastener is a power driven rivet, is

(a) 300 MPa

(b) 250 MPa

(c) 200 MPa

(d) 150 MPa

Q.18. In above question if fastener is hand driven rivet then value of maximum permissible bearing stress in connected part is

(a) 300 MPa

(b) 250 MPa

(c) 200 MPa

(d) 150 MPa

Q.19. For a hand driven rivet, the maximum permissible bearing stress for connected part will be

(a) 1.5fy

(b) 1.2fy

(c) fy

(d) 0.8fy

where fy is yield stress of connected part. Q.20. In above value of maximum permissible bearing stress for connected part if hand driven rivet is used, is

(a) 1.5fy

(b) 1.2 fy

(c) fy

(d) 0.8fy

ANSWER

1

1. a

2. c

3. b

4. a

5. d

6. c

7. a

8. b

9. d

10. c

11. d

12. c

13. d

14. d

15. d

16. c

17. a

18. b

19. b

20. c

No comments:

Email This

BlogThis!

Share

to Twitter

Share

to Facebook

Share

to Pinterest

Labels: Civil - Steel Structures SATURDAY, AUGUST 17, 2019 STEEL STRUCTURES - RIVETED CONNECTIONS Q.1. The size of rivet is the diameter of the

(a) button head

(b) shank

(c) average of button head and shank

(d) none of these

Q.2. Countersunk rivets are used to get (a) elevated surface

(b) flat surface

(c) depressed surface

(d) none of these

Q.3. H.S.F.G. bolts are designed for

(a) shear

(b) bearing

(c) friction

(d) bending

Q.4. Pins are designed for

(a) shear

(b) bearing

(c) bending

(d) friction

Q.5. If the rivet diameter is upto 25 mm then size of drill/punch will

be

(a) 26.5 mm

(b) 25 mm

(c) 1.5 mm less than rivet dia (d) 1.5 mm more than rivet dia Q.6. The size of rivet hole for a rivet of diameter 25 will be

(a) 23.5 mm

(b) 25 mm

(c) 26.5 mm

(d) 27 mm

Q.7. If the rivet diameter is upto 25 mm then size of drill/punch will

be

(a) 26.5 mm

(b) 1.5 mm larger than rivet dia (c) 2 mm larger than rivet dia (d) 3 mm larger than rivet dia Q.8. The size of hole for 27 mm dia rivet is

(a) 25 mm

(b) 28.5 mm

(c) 29 mm

(d) 27 mm

Q.9. Commonly used bolts in steel works are (a) hexagonal black bolts

(b) precision bolts

(c) semi precision bolts (d) high strength friction grip bolts Q.10. Nominal diameter of rivet/bolt is (a) diameter of shank before riveting (b) diameter of unthreaded portion of shank of bolt (c) both (a) and (b) (d) none of the above Q.11. For rivet, gross diameter of rivet is (a) diameter of rivet (b) diameter of rivet hole (c) diameter of rivet + 1.5 mm (d) diameter of rivet + 2 mm Q.12. Gross diameter of bolt is (a) nominal diameter of bolt (b) diameter of bolt hole (c) diameter of bolt + 1.5 mm (d) diameter of bolt + 2 mm Q.13. Area obtained from gross diameter is called

(a) net area

(b) gross area

(c) average area

(d) mean area

Q.14. For bolt, the area of the root of the thread is called

(a) net area

(b) gross area

(c) average area

(d) mean area

Q.15. A steel plate is 30 cm wide and 10 mm thick. A rivet of nominal diameter 18 mm is driven. The net sectional area of the plate is

(a) 18.00 cm²

(b) 28.20 cm²

(c) 28.05 cm²

(d) 32.42 cm² (IES 1995) Q.16. The distance between centres of any two adjacent rivets is

called

(a) gauge

(b) diagonal pitch

(c) edge distance

(d) pitch

Q.17. The distance between any two consecutive rivets in a zig-zag riveting, measured parallel to the direction of stress in a member is

called

(a) pitch

(b) diagonal pitch

(c) staggered pitch

(d) edge distance

Q.18. A row of rivets parallel to the direction of force is called a

(a) rivet line

(b) gauge line

(c) fracture line

(d) failure line

Q.19. The distance between two adjacent gauge lines is called

(a) gauge distance

(b) edge distance

(c) pitch

(d) none of these

Q.20. According to IS: 800-1984 gross dia for 12 mm, 18 mm, 22 mm, and 30 mm nominal dia. rivets are respectively (in mm) (a) 12.5, 19.5, 22.5, 30.5 (b) 13.5, 19.5, 23.5, 32

(c) 12, 18, 22, 30

(d) 13.5, 19.5, 23.5, 31.5

ANSWER

1

1. b

2. b

3. c

4. c

5. d

6. c

7. c

8. c

9. a

10. c

11. b

12. a

13. b

14. a

15. c

16. d

17. c

18. b

19. a

20. b

No comments:

Email This

BlogThis!

Share

to Twitter

Share

to Facebook

Share

to Pinterest

Labels: Civil - Steel Structures TUESDAY, AUGUST 13, 2019 INTERVIEW QUESTIONS (DESIGN OF MACHINE ELEMENTS - SPRINGS)

DEFINE PITCH.

Pitch of the spring is defined as the axial distance between the adjacent coils in an uncompressed state. Mathematically Pitch-free

length/n-

WHAT ARE THE POINTS TO BE TAKEN INTO CONSIDERATION WHILE SELECTING THE PITCH OF THE SPRING? The points taken into consideration of selecting the pitch of the

springs are

* The pitch of the coil should be such * that if the spring is accidentally compressed the stress does not increase the yield point stress in torsion. * The spring should not be close up before the maximum service load

is reached.

DEFINE ACTIVE TURNS. Active turns of the spring are defined as the number of turns, which impart spring action while loaded. As load increases the no of active

coils decreases.

DEFINE INACTIVE TURNS. Inactive turns of the spring are defined as the number of turns which does not contribute to the spring action while loaded. As load increases the number of inactive coils increases from 0.5 to 1 turn. WHAT ARE THE DIFFERENT KINDS OF END CONNECTIONS FOR COMPRESSION

HELICAL SPRINGS?

The different kinds of end connection for compression helical springs

are

* Plain ends

* Ground ends

* Squared ends

* Ground & square ends WRITE ABOUT THE ECCENTRIC LOADING OF SPRINGS? If the load acting on the spring does not coincide with the axis of the spring, then spring is said to have an eccentric load. In eccentric loading, the safe load of the spring decreases and the stiffness of the spring is also affected. EXPLAIN ABOUT THE SURGE IN SPRINGS? When one end of the spring is resting on a rigid support and the other end is loaded suddenly, all the coils of spring does not deflect equally, because some time is required for the propagation of stress along the wire. Thus a wave of compression propagates to the fixed end from where it is reflected back to the deflected end this wave passes through the spring indefinitely. If the time interval between the load application and that of the wave to propagate are equal, then resonance will occur. This will result in very high stresses and cause failure. This phenomenon is called a surge. WHAT ARE THE METHODS USED FOR ELIMINATING SURGE IN SPRINGS? The methods used for eliminating surge are * By using dampers on the centre coil so that the wave propagation

dies out

* By using springs having a high natural frequency. WHAT ARE THE DISADVANTAGES OF USING HELICAL SPRING OF NON-CIRCULAR

WIRES?

* The quality of the spring is not good * The shape of the wire does not remain constant while forming the helix. It reduces the energy absorbing capacity of the spring. * The stress distribution is not favourable as in circular wires. But this effect is negligible where loading is of static nature. WHY CONCENTRIC SPRINGS ARE USED? * To get greater spring force within a given space * To ensure the operation of a mechanism in the event of failure of

one of the spring

Subscribe

No comments:

Email This

BlogThis!

Share

to Twitter

Share

to Facebook

Share

to Pinterest

Labels: Mechanical - Interview Questions

Older Posts

Home

Subscribe to: Posts (Atom)

EMAIL

Subscribe to get posts by email

BRANCHES/SUBJECTS

* Basic Courses - Material Science

(21)

* Civil - Building Construction

(7)

* Civil - Building Materials

(26)

* Civil - Practice Tests

(4)

* Civil - Soil Mechanics

(14)

* Civil - Steel Structures

(2)

* Computer - Computer Fundamentals

(19)

* Computer - Computer Networking

(5)

* Computer - Data Structure

(3)

* Computer - Information Technology

(1)

* Computer - Programing Languages

(17)

* Electrical - Basic Electrical Science

(10)

* Electrical - Electrical Machines

(21)

* Electrical - Interview Questions

(5)

* Electrical - Power Systems

(1)

* GATE (1)

* Mechanical - Fluid Mechanics

(6)

* Mechanical - Interview Questions

(8)

* Mechanical - Practice Tests

(1)

* Mechanical - Strength of Materials

(9)

* Mechanical - Thermodynamics

(16)

POPULAR POSTS

*

Electrical Machines (D.C. Motor) 1. In a d.c. motor, unidirectional torque is produced with the help of (a) brushes (b) commutator (c) end-plates (d) both (a) and (...

*

Electrical Machines (Induction Motor) 1. Regarding skewing of motor bars in a squirrel cage induction motor, (SCIM) which statement is false ? (a) it prevents cogging (b)

it...

*

Electrical Machines (Transformer) 1. A transformer transforms (a) frequency (b) voltage (c) current (d) voltage and current. 2. Which of the following is not a ...

MATH

A _blog _maintained by www.amiestudycircle.com Powered by Blogger .