The expected efficiency of a single riveted lap joint is of the order of 50%. If the thickness of the plate is increased four times, then the rivet diameter will have to be increased __________ times. (A) Two (B) Four (C) Six (D) Eight

The expected efficiency of a single riveted lap joint is of the order of
50%. If the thickness of the plate is increased four times, then the rivet
diameter will have to be increased __________ times.
(A) Two
(B) Four
(C) Six
(D) Eight
by

1 Answer

Answer :

Option A
by

Related questions

The difference in the reservoir level and the lowest point of the water mains is 180 m. The expected pressure due to water hammer is 7.5 kg/cm2 in a pressure conduit of diameter 1 m. Assuming the efficiency of the riveted joints of the pipe as 0.6 and minimum cover 3 mm for corrosion, the thickness of the pipe materials, is (A) 10 mm (B) 15 mm (C) 20 mm (D) 25 mm

Description : The difference in the reservoir level and the lowest point of the water mains is 180 m. The  expected pressure due to water hammer is 7.5 kg/cm2  in a pressure conduit of diameter 1 m.  Assuming the efficiency of the ... , is  (A) 10 mm  (B) 15 mm  (C) 20 mm  (D) 25 mm 

Last Answer : (C) 20 mm

Failure of riveted joints is due to (A) Tearing of the plates between the rivet hole and the edge of the plate (B) Tearing of plates between rivets (C) Shearing of rivets (D) All the above

Description : Failure of riveted joints is due to  (A) Tearing of the plates between the rivet hole and the edge of the plate  (B) Tearing of plates between rivets  (C) Shearing of rivets  (D) All the above 

Last Answer : (D) All the above 

When two plates butt together and are riveted with two cover plates with two rows of rivets, the joint is known as (A) Lap joint (B) Butt joint (C) Single riveted single cover butt joint (D) Double riveted double cover butt joint

Description : When two plates butt together and are riveted with two cover plates with two rows of rivets, the joint is known as (A) Lap joint (B) Butt joint (C) Single riveted single cover butt joint (D) Double riveted double cover butt joint

Last Answer : (D) Double riveted double cover butt joint

According to Unwin's formula, the diameter of a rivet of plate of thickness is : (A) d = 6.05 t (B) d = 1.5 t + 4 (C) d = t(D) d = t + 1.5

Description : According to Unwin's formula, the diameter of a rivet of plate of thickness is :  (A) d = 6.05 t (B) d = 1.5 t + 4  (C) d = t (D) d = t + 1.5 

Last Answer : (A) d = 6.05 t

Diameter of the rivet to be provided on a 20 mm. thick boiler plate will be __________ mm. (A) 10 (B) 20 (C) 30 (D) 40

Description : Diameter of the rivet to be provided on a 20 mm. thick boiler plate will be __________ mm. (A) 10 (B) 20 (C) 30 (D) 40

Last Answer : (D) 40

Efficiency of a welded joint with respect to a riveted joint is a. Smaller b. Equal c. Greater

Description : Efficiency of a welded joint with respect to a riveted joint is a. Smaller b. Equal c. Greater

Last Answer : c. Greater

Single full fillet welded joint cannot be used for a plate thickness greater than i. 1/8” ii. 2/8” iii. 3/8” iv. None

Description : Single full fillet welded joint cannot be used for a plate thickness greater than i. 1/8” ii. 2/8” iii. 3/8” iv. None

Last Answer : iii. 3/8”

If b is the width of a plate joined by diamond riveting of diameter d, the efficiency of the joint is given by (A) (b + d)/b (B) (b - d)/b (C) (d - b)/d (D) (b - d)/d

Description : If b is the width of a plate joined by diamond riveting of diameter d, the efficiency of the joint is  given by  (A) (b + d)/b (B) (b - d)/b (C) (d - b)/d (D) (b - d)/d

Last Answer : (B) (b - d)/b

Pick out the wrong statement. (A) In the McCabe-Thiele diagram for binary distillation, vertical feed line represents saturated liquid feed and horizontal feed line represents saturated vapour feed (B) In small columns, local efficiency is larger than Murphree efficiency; in large columns local efficiency is smaller than Murphree efficiency (C) For Laminar flow over a plate of length L, the local mass transfer co￾efficient at a distance L from the leading edge is 1.5 × 10 -2m/s. Then the average mass transfer co-efficient for the plate is 2 × 10 -2m/s (D) The concentration and hydrodynamic boundary layers over a flat plate are of equal thickness, if Schmidt number is equal to unity

Description : Pick out the wrong statement. (A) In the McCabe-Thiele diagram for binary distillation, vertical feed line represents saturated liquid feed and horizontal feed line represents saturated vapour feed (B) In ... layers over a flat plate are of equal thickness, if Schmidt number is equal to unity

Last Answer : (C) For Laminar flow over a plate of length L, the local mass transfer co￾efficient at a distance L from the leading edge is 1.5 × 10 -2m/s. Then the average mass transfer co-efficient for the plate is 2 × 10 -2m/s

Hydraulic diameter for non-circular ducts is equal to __________ times the area of flow divided by the perimeter. (A) Two (B) Three (C) Four (D) Eight

Description : Hydraulic diameter for non-circular ducts is equal to __________ times the area of flow divided by the perimeter. (A) Two (B) Three (C) Four (D) Eight

Last Answer : (C) Four

If the path of liquid across the plate is very long as in case of large diameter tower, Murphree efficiency can be __________ percent(A) 100(B) > 100(C) < 100(D) None of these

Description : If the path of liquid across the plate is very long as in case of large diameter tower, Murphree efficiency can be __________ percent (A) 100 (B) > 100 (C) < 100 (D) None of these

Last Answer : (B) > 100

Welded structures with respect to riveted joint is a. Weakened in tension b. Strengthened in tension c. No change in tension strength d. None

Description : Welded structures with respect to riveted joint is a. Weakened in tension b. Strengthened in tension c. No change in tension strength d. None

Last Answer : c. No change in tension strength

The strength of a welded joint with respect to a riveted joint is a. Greater b. Smaller c. Equal d. None

Description : The strength of a welded joint with respect to a riveted joint is a. Greater b. Smaller c. Equal d. None

Last Answer : a. Greater

The advantage of a welded joint over a riveted joint is (i) Introduce residual stresses (ii) Requires highly skilled labor and supervision (iii) Lighter in weight (iv) None

Description : The advantage of a welded joint over a riveted joint is (i) Introduce residual stresses (ii) Requires highly skilled labor and supervision (iii) Lighter in weight (iv) None

Last Answer : (iii) Lighter in weight

The objective of caulking in a riveted joint is to make the joint (A) Free from corrosion (B) Stronger in tension (C) Free from stress (D) Leak-proof

Description : The objective of caulking in a riveted joint is to make the joint (A) Free from corrosion (B) Stronger in tension (C) Free from stress (D) Leak-proof

Last Answer : (D) Leak-proof

Steel pipe are (A) Suitable for withstanding high internal pressure (B) Connected by riveted or welded joints (C) Generally laid underground and no expansion joint is required (D) Likely to last 100 years under ordinary conditions

Description : Steel pipe are  (A) Suitable for withstanding high internal pressure  (B) Connected by riveted or welded joints  (C) Generally laid underground and no expansion joint is required  (D) Likely to last 100 years under ordinary conditions 

Last Answer : (D) Likely to last 100 years under ordinary conditions 

The length of lap in tension reinforcement should not be less than the bar diameter × (actual tension / four times the permissible average bond stress) if it is more than (A) 18 bar diameters (B) 24 bar diameters (C) 30 bar diameters (D) 36 bar diameters

Description : The length of lap in tension reinforcement should not be less than the bar diameter × (actual tension / four times the permissible average bond stress) if it is more than (A) 18 bar diameters (B) 24 bar diameters (C) 30 bar diameters (D) 36 bar diameters

Last Answer : Answer: Option C

Pick out the wrong statement. (A) Seam welding, projection welding & spot welding are the classification of electrical resistance welding (B) Electrode tip in spot welding is of copper and the tip diameter should be equal to t (where, t = plate thickness to be welded) (C) In spot welding, two pieces to be joined are overlapped and placed between two electrodes (D) Mild steel sheet cannot be spot welded

Description : Pick out the wrong statement. (A) Seam welding, projection welding & spot welding are the classification of electrical resistance welding (B) Electrode tip in spot welding is of copper and the ... joined are overlapped and placed between two electrodes (D) Mild steel sheet cannot be spot welded

Last Answer : (D) Mild steel sheet cannot be spot welded

Double full fillet welded joint cannot be used for a plate thickness greater than i. 1/8” ii. 3/8” iii. 5/8” iv. None

Description : Double full fillet welded joint cannot be used for a plate thickness greater than i. 1/8” ii. 3/8” iii. 5/8” iv. None

Last Answer : iii. 5/8”

In a cross joint tensile test the following observations were made: Specimen width 20mm, Material thickness 20mm, Max Load: 180kN, Break position: Parent Plate. What is the UTS? a) 45 kN/mm b) 450 N/mm2c) 39 kN/mm2d) 39 N/mm2

Description : In a cross joint tensile test the following observations were made: Specimen width 20mm, Material thickness 20mm, Max Load: 180kN, Break position: Parent Plate. What is the UTS? a) 45 kN/mm b) 450 N/mm2c) 39 kN/mm2d) 39 N/mm2

Last Answer : b) 450 N/mm2

As per the Indian boiler regulation (IBR), the type of joint preferred for the circumferential joint is the __________ joint. (A) Butt (B) Lap (C) Welded (D) None of these

Description : As per the Indian boiler regulation (IBR), the type of joint preferred for the circumferential joint is the __________ joint. (A) Butt (B) Lap (C) Welded (D) None of these

Last Answer : (B) Lap

For a major bridge, the URN would comprise of a) single digit b)eight digits* c) six digits d) four digits

Description : For a major bridge, the URN would comprise of a) single digit b)eight digits* c) six digits d) four digits

Last Answer : b)eight digits*

The diameter of hole for 20 dia rivet shall be a) 23 mm b) 18 mm c) 21.5 mm* d) 22 mm

Description : The diameter of hole for 20 dia rivet shall be a) 23 mm b) 18 mm c) 21.5 mm* d) 22 mm

Last Answer : c) 21.5 mm*

If d is the diameter of the pipe, p is the total internal pressure, f is the permissible tensile stress and n is the effective of the joint, the thickness t of metal pipe, is (A) n (pd/2f) (B) (1/n) (pd/2f) (C) (1/n) (pd/3f) (D) (1/n) (pf/d

Description : If d is the diameter of the pipe, p is the total internal pressure, f is the permissible tensile stress  and n is the effective of the joint, the thickness t of metal pipe, is  (A) n (pd/2f)  (B) (1/n) (pd/2f)  (C) (1/n) (pd/3f)  (D) (1/n) (pf/d

Last Answer : (B) (1/n) (pd/2f) 

The maximum longitudinal pitch in bolted joints, subjected to tensile forces, wherein t = thickness of the plate and D = diameter of bolt, is (a) 32 D (b) 16 D (c) 32 t (d) 16 t

Description : The maximum longitudinal pitch in bolted joints, subjected to tensile forces, wherein t = thickness of the plate and D = diameter of bolt, is (a) 32 D (b) 16 D (c) 32 t (d) 16 t

Last Answer : (d) 16 t

Two shafts A and B are made of same material. The diameter of shaft A is twice that of B. The torque transmitted by shaft A will be (A) Twice that of B (B) Four times that of B (C) Eight times that of B (D) Sixteen times that of B

Description : Two shafts A and B are made of same material. The diameter of shaft A is twice that of B. The torque transmitted by shaft A will be (A) Twice that of B (B) Four times that of B (C) Eight times that of B (D) Sixteen times that of B

Last Answer : (C) Eight times that of B

Two shafts A and B are made of the same material. The diameter of the shaft A is twice as that of shaft B. The power transmitted by the shaft A will be ........... of shaft B. (a) twice (b) four times (c) eight times (d) sixteen times

Description : Two shafts A and B are made of the same material. The diameter of the shaft A is twice as that of shaft B. The power transmitted by the shaft A will be ........... of shaft B. (a) twice (b) four times (c) eight times (d) sixteen times

Last Answer : (c) eight times

If diameter of a shaft is doubled the power transmitted capacity will be a. Either twice or half b. Four times c. Eight times d. Same

Description : If diameter of a shaft is doubled the power transmitted capacity will be a. Either twice or half b. Four times c. Eight times d. Same

Last Answer : c. Eight times

The boundary layer thickness at a given section along a flat plate __________ with increasing Reynold's number(A) Increases(B) Decreases(C) Remain same(D) May increase or decrease.

Description : The boundary layer thickness at a given section along a flat plate __________ with increasing Reynold's number. (A) Increases (B) Decreases (C) Remain same (D) May increase or decrease

Last Answer : (B) Decreases

The length of the lap in a compression member is kept greater than bar diameter x (Permissible stress in bar / Five times the bond stress) or (A) 12 bar diameters (B) 18 bar diameters (C) 24 bar diameters (D) 30 bar diameters

Description : The length of the lap in a compression member is kept greater than bar diameter x (Permissible stress in bar / Five times the bond stress) or (A) 12 bar diameters (B) 18 bar diameters (C) 24 bar diameters (D) 30 bar diameters

Last Answer : Answer: Option C

Which of the following is preferred for riveting? (A) Lap joint (B) Butt joint (C) Either (A) or (B) (D) Neither (A) nor (B)

Description : Which of the following is preferred for riveting? (A) Lap joint (B) Butt joint (C) Either (A) or (B) (D) Neither (A) nor (B)

Last Answer : (B) Butt joint

Lower BWG means __________ of the tube. (A) Lower thickness (B) Lower cross-section (C) Outer diameter (D) Inner diameter

Description : Lower BWG means __________ of the tube. (A) Lower thickness (B) Lower cross-section (C) Outer diameter (D) Inner diameter

Last Answer : (B) Lower cross-section

Maximum heat dissipation occurs from a steel wire (k = 0.5 W/m. k) of 15 mm diameter exposed to air (h = 20W/m2.k), when the insulation thickness is __________ mm. (A) 15 (B) 25 (C) 10 (D) 30

Description : Maximum heat dissipation occurs from a steel wire (k = 0.5 W/m. k) of 15 mm diameter exposed to air (h = 20W/m2.k), when the insulation thickness is __________ mm. (A) 15 (B) 25 (C) 10 (D) 30

Last Answer : (B) 25

A 300mm diameter pipe, 5mm wall thickness is to be radiographed using the double wall single image technique. The source to be used is Iridium. Which of the following statements is true? a) It should not be done because the thickness is below that recommended b) It should be better to use a cobalt 60 source in this instance c) There is no problem with the technique d) Only the double wall, double image technique should be used with Iridium

Description : A 300mm diameter pipe, 5mm wall thickness is to be radiographed using the double wall single image technique. The source to be used is Iridium. Which of the following statements is true? a) ... problem with the technique d) Only the double wall, double image technique should be used with Iridium

Last Answer : c) There is no problem with the technique

Volumetric efficiency of air compressor is of the order of A. 20% to 30 % B. 40% to 50% C. 60% to 70% D. 70% to 90%

Description : Volumetric efficiency of air compressor is of the order of A. 20% to 30 % B. 40% to 50% C. 60% to 70% D. 70% to 90%

Last Answer : ANSWER : D

What is the maximum time interval permissible between two successive sessions of the Parliament? (1) Four months (2) Six months (3) Eight months (4) Nine months

Description : What is the maximum time interval permissible between two successive sessions of the Parliament? (1) Four months (2) Six months (3) Eight months (4) Nine months

Last Answer : (2) Six months Explanation: The period during which the House meets to conduct its business is called a session. The Constitution empowers the President to summon each House at such intervals that there ... month's gap between the two sessions. Hence the Parliament must meet at least twice a year.

How many minutes for each degree of longitude does the local time of any place vary from the Greenwich time? (1) Two minutes (2) Four minutes (3) Six minutes (4) Eight minutes

Description : How many minutes for each degree of longitude does the local time of any place vary from the Greenwich time? (1) Two minutes (2) Four minutes (3) Six minutes (4) Eight minutes

Last Answer : (2) Four minutes Explanation: The first of these ideas is the relationship between time and the rotation of the Earth. It takes an average time of 24 hours for the Earth to rotate 360 degrees. If you ... four minutes. 1 hour = 60 minutes / 15° = 4 minutes per degree Physical Geography (Set: 09)

1-Buten-3-yne has (a) six σ and four π bonds (b) seven σ and three π bonds (c) eight σ and two π bonds (d) nine σ and one π bond

Description : 1-Buten-3-yne has (a) six σ and four π bonds (b) seven σ and three π bonds (c) eight σ and two π bonds (d) nine σ and one π bond

Last Answer : seven σ and three π bonds

In multiple point mooring system, vessel is secured to minimum of (A) Two points (B) Four points (C) Six points (D) Eight points

Description : In multiple point mooring system, vessel is secured to minimum of (A) Two points (B) Four points (C) Six points (D) Eight points

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Description : Minimum number of bars for a column of rectangular section [ A ] Two [ B ] Four [ C ] Six [ D ] Eight

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We elect a U.S. Representative for how many years? Choose one: a. Six (6). b. Two (2). c. Four (4). d. Eight (8).

Description : We elect a U.S. Representative for how many years? Choose one: a. Six (6). b. Two (2). c. Four (4). d. Eight (8).

Last Answer : Correct Answer: b. Two (2)

How many atoms per unit cell are in a face-centered-cubic crystal? w) two x) four y) six z) eight

Description : How many atoms per unit cell are in a face-centered-cubic crystal? w) two x) four y) six z) eight

Last Answer : ANSWER: X -- FOUR

How many minutes for each degree of longitude does the local time of any place vary from the Greenwich time ? (1) Two minutes (2) Four minutes (3) Six minutes (4) Eight minutes

Description : How many minutes for each degree of longitude does the local time of any place vary from the Greenwich time ? (1) Two minutes (2) Four minutes (3) Six minutes (4) Eight minutes

Last Answer : Four minutes

If the polar moment of inertia is increased to four times, then what will be the effect on free torsional vibrations of a single motor system? A. Increases 4 times B. Increases 2 times C. Decreases 4 times D. Decreases 2 times

Description : If the polar moment of inertia is increased to four times, then what will be the effect on free torsional vibrations of a single motor system? A. Increases 4 times B. Increases 2 times C. Decreases 4 times D. Decreases 2 times

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If the mass moment of inertia is increased to four times, then what will be the effect on free torsional vibrations of a single motor system? a) Increases 4 times b) Increases 2 times c) Decreases 4 times d) Decreases 2 times

Description : If the mass moment of inertia is increased to four times, then what will be the effect on free torsional vibrations of a single motor system? a) Increases 4 times b) Increases 2 times c) Decreases 4 times d) Decreases 2 times

Last Answer : d) Decreases 2 times

If the polar moment of inertia is increased to four times, then what will be the effect on free torsional vibrations of a single motor system? a) Increases 4 times b) Increases 2 times c) Decreases 4 times d) Decreases 2 times

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Last Answer : b) Increases 2 times

Sukanya Samriddhi Account can be opened up to age of ________ years only from the date of birth A. Five years B. Four years C. Six years D. Eight years E. Ten years

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Last Answer : E. Ten years Explanation: Sukanya Samriddhi Account can be opened up to age of 10 years only from the date of birth.

How many PM knowledge areas are defined by Project Management Institute (PMI) A. Six B. Four C. Eight D. Ten (Ans.)

Description : How many PM knowledge areas are defined by Project Management Institute (PMI)  A. Six  B. Four  C. Eight  D. Ten (Ans.)

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For a robot unit to be considered a functional industrial robot, typically, how many degrees of freedom would the robot have? a) three b) four c) six d) eight

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