Description : With increase in the schedule number of a pipe of a particular nominal size, the (A) Wall thickness also increases (B) I.D. of the pipe decreases (C) O.D. of the pipe remains constant (D) All (A), (B) and (C)
Last Answer : (D) All (A), (B) and (C)
Description : Nominal Pipe Size (NPS) of a pipe less than 12 inches in diameter indicates its (A) Inner diameter (B) Outer diameter (C) Thickness (D) Neither inner nor outer diameter
Last Answer : (D) Neither inner nor outer diameter
Description : Size of boiler tubes is specified by a) Mean diameter and thickness b) Inside diameter and thickness c) Outside diameter and thickness d) Outside diameter and inside diameter
Last Answer : c) Outside diameter and thickness
Description : The equivalent diameter for the annulus of a double pipe heat exchanger, whose inner pipe has fins on the outside is __________ compared to the same size pipes without fins. (A) More (B) Less (C) Same (D) Unpredictable
Last Answer : (B) Less
Description : Pipes having diameter 14 inches or more are designated by their (A) Outside diameter (B) Inside diameter (C) Schedule number (D) None of these
Last Answer : (A) Outside diamete
Description : Pick up the wrong nominal internal diameter of cast iron (spun) pipes in mm from the following: (A) 300 (B) 400 (C) 550 (D) 650
Last Answer : (C) 550
Description : Pick up the correct statement from the following: (A) All pipes and fittings are classified according to their diameters (B) The diameter of the pipes is the nominal diameter of internal bore (C) All pipes are measured along the centre line of the pipes in metres (D) All the above
Last Answer : (D) All the above
Description : When the term "nominal size" is used to describe a component under ASME B16.5, what does this indicate? a) A dimension. b) A size designation. c) The inside diameter. d) The flange bolt circle.
Last Answer : b) A size designation.
Description : The nominal size of a hose pipe is specified by its (A) I.D. (B) O.D. (C) Thickness (D) None of these
Last Answer : (A) I.D.
Description : The pipe wall thickness is minimum for a pipe of given nominal size having schedule number (A) 160 (B) 120 (C) 80 (D) 40
Last Answer : (D) 40
Description : Nominal size of a pipe is an indication of its __________ diameter. (A) Inner (B) Outer (C) Approximate (D) None of these
Last Answer : (C) Approximate
Description : For specified tube outside diameter, higher BWG means higher (A) Tube thickness (B) Cross-sectional area (C) Weight per unit length (D) None of these
Last Answer : (B) Cross-sectional area
Description : What is the ratio of displacement thickness to nominal thickness for a linear distribution of velocity in the boundary layer on a flat plate? (A) 0.5 (B) 1 (C) 1.5 (D) 2
Last Answer : (A) 0.5
Description : A short, hollow cast iron cylinder with a wall thickness of 1 cm is to carry a compressive load of 10 tonnes. If the working stress in compression is 800 kg/cm2, the outside diameter of the cylinder should not be less than a) 0.5cm b) 5 cm c) 2.5cm d) 4.5 cm
Last Answer : b) 5 cm
Description : The heat flux (from outside to inside) across an insulating wall with thermal conductivity, K = 0.04 W/m.°K and thickness 0.16m is 10 W/m2 . The temperature of the inside wall is - 5°C. The outside wall temperature is (A) 25°C (B) 30°C (C) 35°C (D) 40°C
Last Answer : (C) 35°C
Description : Walls of a cubical oven are of thickness l, and they are made of material of thermal conductivity k. The temperature inside the oven is 100°C and the inside heat transfer co-efficient is 3k/l'. If the wall temperature ... wall temperature in degree centigrade? (A) 35.5 (B) 43.75 (C) 81.25 (D) 48.25
Last Answer : (C) 81.25
Description : Q No: 78 Hume steel pipes are A. Steel pipes B. Steel shell coated from inside with cement mortar C. Steel shell coated from outside with cement mortar D. Both B. and C.
Last Answer : ANS: D
Description : The nominal thickness of an expansion joint in brick walls, is kept more than (A) 5 mm (B) 10 mm (C) 15 mm (D) 20 mm
Last Answer : Answer: Option D
Description : The nominal thickness of one brick wall in mm, is (A) 90 mm (B) 150 mm (C) 190 mm (D) 200 mm
Description : Consider two pipes of same length and diameter through which water is passed at the same velocity. The friction factor for rough pipe is f1 and that for smooth pipe is f2 . Pick out the correct statement. (A) f1 = f2 (B) f1 < f2 (C) f1 > f2 (D) Data not sufficient to relate f1 & f2
Last Answer : (C) f1 > f2
Description : Two fluids are flowing through two similar pipes of the same diameter. The Reynold's number is same. For the same flow rate if the viscosity of a fluid is reduced to half the value of the ... (A) Increase (B) Decrease (C) Remain unchanged (D) Data insufficient to predict relative pressure drop
Last Answer : (B) Decrease
Description : Nominal diameter of the screw thread is the same as core diameter. a) True b) False
Last Answer : b) False
Description : Nominal size of the discharge pipe of a pump is usually __________ the nominal size of the inlet pipe. (A) Smaller than (B) Larger than (C) Same as (D) Twice
Last Answer : (A) Smaller than
Description : A compound pipe is required to be replaced by a new pipe. The two pipes are said to be equivalent, if (A) Length of both the pipes is same (B) Diameter of both the pipes is same (C) Loss of ... discharge of both the pipes is same (D) Loss of head and velocity of flow in both the pipes is same
Last Answer : Answer: Option C
Description : The most economical flow control valve for use with large diameter pipes is a (A) Butterfly valve (B) Globe valve (C) Needle valve (D) None of these
Last Answer : (A) Butterfly valve
Description : Larger length & diameter water pipes are made by (A) Electrical resistance welding (B) Die casting (C) Semi-centrifugal casting (D) Continuous casting
Last Answer : options A
Last Answer : Option C
Description : Large diameter reinforced cement concrete (RCC) pipes are generally joined by __________ joint. (A) Flanged iron (B) Collar (C) Flexible (D) Expansion
Last Answer : Option B
Description : If core diameter of bolt is 13.8cm the it’s nominal diameter is given by? a) 17.27mm b) 15.34mm c) 14.67mm d) 16.34mm
Last Answer : a) 17.27mm
Description : What is the approximate nominal diameter for coarse threads? a. d = 1.136 dc b. d = 1.59 dc c. d = 1.19 dc d. d = 0.5 dc
Last Answer : c. d = 1.19 dc
Description : The type of aggregates of same nominal size, which contain less voids when compacted, are (A) Rounded spherical (B) Irregular (C) Flaky (D) None of these
Last Answer : Answer: Option A
Description : What is the ratio of hoop stresses in a spherical vs cylindrical shell of same diameter, thickness and under same pressure? a. 4:1 b. 2:1 c. 1:2 d. 1:4
Last Answer : c. 1:2
Description : Among the cylindrical and spherical thin vessels of same material, diameter and pressure which has the lesser thickness a. Cylindrical shell b. Spherical shell c. Cylindrical shell with semi spherical heads d. None
Last Answer : b. Spherical shell
Description : The ratio of strengths of solid to hollow shafts, both having outside diameter D and hollow having inside diameter D/2, in torsion, is (A) 1/4 (B) 1/2 (C) 1/16 (D) 15/15
Last Answer : (D) 15/15
Description : The ratio of strengths of solid to hollow shafts, both having outside diameter D and hollow having inside diameter D/2, in torsion, is a.1/4 b. 1/2 c. 1/16 d. 15/16
Last Answer : d. 15/16
Description : Market requirements describe the A)customer needs or desired benefits. B)size of the market necessary to justify expenditures. C)events and relationships in a company's outside environment. ... and the particular competencies of competing firms. E)distinctive competencies that a firm has developed.
Last Answer : A)customer needs or desired benefits.
Description : A tube is specified by its (A) Thickness only (B) Outer diameter only (C) Thickness & outer diameter both (D) Inner diameter
Last Answer : (C) Thickness & outer diameter both
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
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
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
Description : 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
Last Answer : Option A
Description : Pick out the wrong statement. (A) For a pressure vessel to be classified as 'thin vessel', the ratio of wall thickness to mean radius is less than 0.1 (B) For calculating forces and ... Maximum diameter of the opening provided in a pressure vessel, which does not require any compensation is 200 mm
Description : Three materials A, B and C of equal thickness and of thermal conductivity of 20, 40 & 60 kcal/hr. m. °C respectively are joined together. The temperature outside of A and C are 30°C and 100°C respectively. The interface ... C will be at a temperature of __________ °C. (A) 40 (B) 95 (C) 70 (D) 50
Last Answer : (C) 70
Description : Pick up the correct statement from the following: A. The sewer pipes of sizes less than 0.4 m diameter are designed as running full at maximum discharge B. The sewer pipes of sizes greater than 0.4 m ... discharge C. The minimum design velocity of sewer pipes is taken as 0.8 m/sec D. All the above
Description : The diameter of pipes in bath rooms and lavatories in domestic water supply, is (A) 6 mm (B) 12 mm (C) 18 mm (D) 24 mm
Last Answer : (B) 12 mm
Description : The loss of head due to viscosity for laminar flow in pipes is (where d = Diameter of pipe, l = Length of pipe, v w = Specific weight of the flowing liquid) (A) 4 (B) 8 (C) 16 (D) 32
Description : In cement pressure grouting G.I pipes of diameter …… and ……length, should be fixed in drilled holes a) 12 to 20 mm, 200 mm* b) 12 to 20 mm, 300 mm c) 12 to 25 mm, 500 mm d) 20 to 25 mm, 300 mm
Last Answer : a) 12 to 20 mm, 200 mm*
Description : Non bacterialropiness or sliminess in milk and milk products may be duetoThe A- stringiness caused by mastitis and in particular by fibrin and leucocytes from the cow's blood. B- sliminess resulting ... C- stringiness due to thin films of casein or lactalbumin during cooling D- all of the above
Last Answer : all of the above
Description : If the engineer-in-charge approves, the 10 cm cubes may be used for the work test of concrete provided maximum nominal size of aggregate, does not exceed (A) 10 cm (B) 15 cm (C) 20 cm (D) 25 cm
Description : The nominal size of the modular brick is (A) 190 mm × 90 mm × 80 mm (B) 190 mm × 190 mm × 90 mm (C) 200 mm × 100 mm × 100 mm (D) 200 mm × 200 mm × 100 mm