McqMate
| 401. |
The plastic design of steel structures which is based on the statical method of plastic analysis is |
| A. | independent of safety |
| B. | gegas no indication of safety |
| C. | Increasing the diameter of threaded portion |
| D. | Safe |
| E. | Unsafe |
| Answer» D. Safe | |
| 402. |
Which is the variable stress |
| A. | Fluctuating |
| B. | Reversed |
| C. | Repeated |
| D. | Alternating |
| E. | All of the above |
| Answer» E. All of the above | |
| 403. |
Which of the following bearings will have least coefficient of friction? |
| A. | Tapered bearing |
| B. | Self-aligning bearing |
| C. | Cylinder roller bearing |
| D. | Thrust ball bearing |
| E. | Single ball bearing |
| Answer» A. Tapered bearing | |
| 404. |
A stud has |
| A. | Counter shunk head |
| B. | Allen head |
| C. | Slotted head |
| D. | Cylindrical head |
| E. | Both ends threaded |
| Answer» E. Both ends threaded | |
| 405. |
The selection of material for gears depends on |
| A. | Peripheral speed |
| B. | Type of service |
| C. | Required dimensions and weight of the drive |
| D. | Shock and wear resistance |
| E. | All of the above |
| Answer» E. All of the above | |
| 406. |
When large quantities of bolts are to be purchased the quantity is usually specified in terms of |
| A. | Number |
| B. | Volume |
| C. | Packets |
| D. | Weight |
| E. | None of the above |
| Answer» D. Weight | |
| 407. |
Both Soderberg and Gerber criteria for failure theories are overly conservative |
| A. | near the middle of the curves |
| B. | near the right end of the curves |
| C. | Increasing the diameter of threaded portion |
| D. | near the left end of the curves |
| E. | near the left as well as right ends of the curve |
| Answer» B. near the right end of the curves | |
| 408. |
Which of the following statement is incorrect? |
| A. | For columns, the solid round bar is less economical than the turbular section |
| B. | The radius of gyration for the tubular section in all directions remains the same |
| C. | A tubular section is most economical for the column free to buckle in any direction |
| D. | none of the above |
| E. | Increasing the diameter of threaded portion |
| Answer» D. none of the above | |
| 409. |
Coriolis component of acceleration is encountered in |
| A. | Lower pair |
| B. | Higher pair |
| C. | Whit worth-quick-return motion |
| D. | Four bar mechanism |
| E. | Mechanism of steam engine |
| Answer» C. Whit worth-quick-return motion | |
| 410. |
Large sections usually have a somewhat lower permissible stress than small sections. This is due to |
| A. | less homogeneity of structure of material |
| B. | larger residual stress |
| C. | greater probability of structural flaws |
| D. | All of the above |
| E. | Increasing the diameter of threaded portion |
| Answer» D. All of the above | |
| 411. |
The ends of the coil of compression spring which are in contact with the seat are |
| A. | Carry maximum load |
| B. | Have significant role in compression |
| C. | Inactive |
| D. | Most active |
| E. | As active as spring |
| Answer» C. Inactive | |
| 412. |
Transverse slots are provided on a thread |
| A. | To reduce effort required to cut threads |
| B. | For simplicity |
| C. | For chip removal and lubrication |
| D. | To reduce stress on threads to be cut |
| E. | To reduce stress on die |
| Answer» C. For chip removal and lubrication | |
| 413. |
Plow bolts are widely used in |
| A. | electrical fittings |
| B. | plastics |
| C. | form machinery |
| D. | electronic components |
| E. | Increasing the diameter of threaded portion |
| Answer» C. form machinery | |
| 414. |
In case of spur gears, the back lash depends on |
| A. | Module |
| B. | Pitch line velocity |
| C. | Tooth profile |
| D. | Both (A) and (B) above |
| E. | None of the above |
| Answer» D. Both (A) and (B) above | |
| 415. |
If the threads on a bolt are right hand the threads on nut will be |
| A. | Right hand with less clearance |
| B. | Right hand withmore clerance |
| C. | Left hand with more clearance |
| D. | Right hand |
| E. | Left hand |
| Answer» D. Right hand | |
| 416. |
Sand drops from the bottom of a hopper into a horizontally moving belt conveyor. If the conveyor is travelling at 2000 fpm and the sand is fed at the rate of 1500 1b/min, the force necessary to drive the conveyor would be |
| A. | 258 lb |
| B. | Zero |
| C. | Cannot be determined from the given data |
| D. | 10 kg |
| E. | 516 lb |
| Answer» A. 258 lb | |
| 417. |
In nylon bearings operate at very high rpm molybdenum disulphide as used mainly to |
| A. | assists in heat dissipation |
| B. | provide porous bearing media for vibration absorption |
| C. | Increasing the diameter of threaded portion |
| D. | reduce frictional losses |
| E. | improve mechanical and lubricating properties |
| Answer» E. improve mechanical and lubricating properties | |
| 418. |
The pin supporting the exhaust iever of an internal combustion engine is subjected to a shear load of 400 kg/sq-cm the diameter of the pin should be |
| A. | 1.5 cm |
| B. | 4 cm |
| C. | 1 cm |
| D. | 6 cm |
| E. | 2 cm |
| Answer» C. 1 cm | |
| 419. |
Which of the following is not a standard ball diameter for Brinell hardness testing? |
| A. | 25 mm |
| B. | 1 mm |
| C. | 10 mm |
| D. | 5 mm |
| E. | 2 mm |
| Answer» A. 25 mm | |
| 420. |
Rivets are made of |
| A. | Brittle material |
| B. | Ductile material |
| C. | Soft material |
| D. | Hard material |
| E. | None of the above |
| Answer» B. Ductile material | |
| 421. |
A rolled steel flat designated as 50 ISF 8 means |
| A. | the flat is 50 mm wide and 8 mm thick |
| B. | Increasing the diameter of threaded portion |
| C. | the flat has cross-section 50 sq. mm and depth 8 mm |
| D. | the flat has cross-section 50 sq mm and width 8 mm |
| E. | the flat is 50 mm long and 8 mm thick |
| Answer» A. the flat is 50 mm wide and 8 mm thick | |
| 422. |
The loss of strength in compression which occurs when there is a gain in strength in the tension due to overloading is |
| A. | Bousehinger effect |
| B. | Relaxation |
| C. | Hysteresis |
| D. | Iso-strain |
| E. | Hooke's effect |
| Answer» A. Bousehinger effect | |
| 423. |
A spherical gas tank is made of 1 cm steel plate hemispheres but welded together. The tank is 1503 cm in diameter. The allowable internal pressure to which tank may be subjected is the permissible stress be limited to 840 kg/sq cm would be in the range |
| A. | 2.0 to 2.5 kg/sq-cm |
| B. | 3.5 to 5.0 kg/sq-cm |
| C. | 2.5 to 3.5 kg/sq-cm |
| D. | 1.5 to 2.0 kg/sq-cm |
| E. | 1 to 1.5 kg/sq-cm |
| Answer» A. 2.0 to 2.5 kg/sq-cm | |
| 424. |
Which type of gears are preferred for low noise applications? |
| A. | Spur gears with cycloidal profile |
| B. | Spur gears with involute profile |
| C. | Bevel gears |
| D. | Helical gears |
| E. | Any of the above |
| Answer» D. Helical gears | |
| 425. |
A screw jack spindle is provided with |
| A. | Vee threads |
| B. | BSW threads |
| C. | Buttress threads |
| D. | Square threads |
| E. | None of the above |
| Answer» D. Square threads | |
| 426. |
Treads in tyres are provided to |
| A. | increase tyre grip on the road |
| B. | prevent skidding on dusty roads |
| C. | prevent skidding on wet roads |
| D. | none of the above |
| E. | Cast steel |
| Answer» B. prevent skidding on dusty roads | |
| 427. |
An eye bolt is generally provided on |
| A. | Machine tools |
| B. | Cranes |
| C. | Electric motors |
| D. | Automobiles |
| E. | Furnaces |
| Answer» C. Electric motors | |
| 428. |
Which cam profile is preferred for minimum jerks? |
| A. | Flat |
| B. | Involute |
| C. | Cycloidal |
| D. | Simple harmonic |
| E. | Any of the above |
| Answer» C. Cycloidal | |
| 429. |
For a transverse load on a fillet weld of equal legs, the plane of maximum shear force occurs at |
| A. | 72? |
| B. | 75? |
| C. | 45? |
| D. | 30? |
| E. | 67 |
| Answer» E. 67 | |
| 430. |
The function of a washer is |
| A. | To fill the axial gas |
| B. | To provide cushioning effect |
| C. | To absorb shocks and vibrations |
| D. | To provide bearing area |
| E. | None of the above |
| Answer» D. To provide bearing area | |
| 431. |
When it is desired to transmit a high velocity ratio in a limited space, the device used is |
| A. | Worm and worm wheel |
| B. | Bevel gears |
| C. | Helical gears |
| D. | Noone of the above |
| E. | None of the above |
| Answer» A. Worm and worm wheel | |
| 432. |
Automobile gears are generally made of |
| A. | carbon chrome manganese steel |
| B. | Phosphor bronze |
| C. | Grade 30 cast iron |
| D. | Malleable cast iron |
| E. | Any of the above |
| Answer» A. carbon chrome manganese steel | |
| 433. |
The allowable stresses for the design of steel tanks are adopted |
| A. | 80 percent reduced as given in IS : 800 |
| B. | 95 percent reduced as given in IS : 800 |
| C. | 50 percent reduced as given in IS : 800 |
| D. | Increasing the diameter of threaded portion |
| E. | as given in IS : 800 |
| Answer» A. 80 percent reduced as given in IS : 800 | |
| 434. |
In a steam engine, the valve rod is connected to an eccentric rod by means of |
| A. | universal joint |
| B. | flange coupling |
| C. | cotter joint |
| D. | knuckle joint |
| E. | Increasing the diameter of threaded portion |
| Answer» D. knuckle joint | |
| 435. |
While designing a shaft, hub and a key, care is taken so that |
| A. | Key is the weakest component |
| B. | Shaft is the stronger component |
| C. | Key is the strongest component |
| D. | Shaft is the weakest component |
| E. | Hub is the strongest component |
| Answer» A. Key is the weakest component | |
| 436. |
If the shearing stress in a nut is equal to half the tensile stress in a bolt then the length of nut should be equal to |
| A. | Diameter of the bolt |
| B. | 1.50 times diameter of the bolt |
| C. | 1.25 times diameter of the bolt |
| D. | 0.75 times the diameter of the bolt |
| E. | 0.5 times diameter of the bolt |
| Answer» D. 0.75 times the diameter of the bolt | |
| 437. |
An out-of-plane web distribution is known as |
| A. | column buckling |
| B. | web buckling |
| C. | vertical web buckling |
| D. | any of the above |
| E. | Increasing the diameter of threaded portion |
| Answer» D. any of the above | |
| 438. |
Battens in compound steel columns are provided to |
| A. | increase the column capacity |
| B. | ensure unified behaviour |
| C. | prevent buckling |
| D. | Increasing the diameter of threaded portion |
| E. | decrease the buckling in members |
| Answer» B. ensure unified behaviour | |
| 439. |
The stability of a structure is ensured if the restoring moment is |
| A. | equal to |
| C. | greater than |
| D. | Increasing the diameter of threaded portion |
| E. | smaller than |
| Answer» C. greater than | |
| 440. |
The bending moment at a plastic hinge is |
| A. | equal to zero |
| B. | equal to plastic moment of the section |
| C. | Increasing the diameter of threaded portion |
| D. | equal to yield moment of the section |
| E. | greater than plastic moment of the section |
| Answer» B. equal to plastic moment of the section | |
| 441. |
For which of the following gear material the noise level is relatively low? |
| A. | Non-ferrous materials |
| B. | Grade cast iron |
| C. | Non-matallic material |
| D. | Porous materials |
| E. | Alloy steels |
| Answer» C. Non-matallic material | |
| 442. |
The assumption of bi-linearly idealised stress-strain relationship for plastic analysis and design is used for |
| A. | steel structures |
| B. | Increasing the diameter of threaded portion |
| C. | prestressed concrete structures |
| D. | reinforced concrete structures |
| E. | aluminium structures |
| Answer» A. steel structures | |
| 443. |
V-belt sections generally used in an automobiles are |
| A. | A and B |
| B. | C |
| C. | D |
| D. | E |
| E. | Any one of the above |
| Answer» A. A and B | |
| 444. |
The maximum size of the fillet weld that can be applied to the toe of an angle or the round edge should be |
| A. | 1.5 mm less than the thickness of the plate |
| B. | Increasing the diameter of threaded portion |
| C. | equal to the thickness of the plate |
| D. | 0.75 times the thickness of the plate |
| E. | 1.5 mm more than the thickness of the plate |
| Answer» D. 0.75 times the thickness of the plate | |
| 445. |
If M 20 coarse pitch is 2.5 mm the mm the fine pitch for the size would be |
| A. | 10 mm |
| B. | 5 mm |
| C. | 2.5 mm |
| D. | 1.5 mm |
| E. | None of the above |
| Answer» D. 1.5 mm | |
| 446. |
The units of dynamic viscosity are |
| A. | W/m? K |
| B. | Ns/m2 |
| C. | J/kg? K |
| D. | W/m2? K |
| E. | J/?K |
| Answer» B. Ns/m2 | |
| 447. |
The form coefficient of a spring is |
| A. | Dynamic load carrying capacity |
| B. | It capability to store energy |
| C. | The load/unit drflection |
| D. | Load/spring area |
| E. | Ratio of coil diameter to wire diameter |
| Answer» B. It capability to store energy | |
| 448. |
The balls in a ball bearing remain in position |
| A. | Due to centrifugal force |
| B. | In a cage |
| C. | Due to dead load on bearing |
| D. | By lubricant |
| E. | Automatically |
| Answer» B. In a cage | |
| 449. |
Which of the following has highest strength to weight ratio? |
| A. | Alloy steel, heat treated |
| B. | Brass |
| C. | Stainless steel |
| D. | Steel piano wire |
| E. | Aluminium, hard rolled |
| Answer» D. Steel piano wire | |
| 450. |
Maximum gear ratio in case of single mesh spur gears is expected to be around |
| A. | 150 |
| B. | 50 |
| C. | 80 |
| D. | 10 |
| E. | 100 |
| Answer» D. 10 | |
| 451. |
In elevated circular steel tanks, hemispherical bottoms are preferred because |
| A. | large capacity |
| B. | better appearance |
| C. | riveted connection between the side and bottom plates are easy |
| D. | All of the above |
| E. | Increasing the diameter of threaded portion |
| Answer» D. All of the above | |
| 452. |
Stretching on a belt can be controlled by |
| A. | decreasing belt length |
| B. | decreasing stress in the belt |
| C. | decreasing belt velocity |
| D. | none of the above |
| E. | Cast steel |
| Answer» B. decreasing stress in the belt | |
| 453. |
The number of plastic hinges necessary to convert a framed structure into a mechanism is (r is degree of redundancy of the structure) |
| A. | r - 1 |
| B. | r + 1 |
| C. | 2r + 1 |
| D. | 2r - 1 |
| E. | Increasing the diameter of threaded portion |
| Answer» B. r + 1 | |
| 454. |
The surface hardness that can be obtained by nitriding is generally in the range |
| A. | 800 - 1000 VPN |
| B. | Below 400 VPN |
| C. | 1000 - 1100 VPN |
| D. | 600 - 800 VPN |
| E. | 400 - 600 VPN |
| Answer» C. 1000 - 1100 VPN | |
| 455. |
A circulating water pump of a condenser is of the centrifugal type and directly connected to a three phase induction motor running at 900 rpm. The pump delivers 30,000 litres per minute against the dynamic head of 10 m. The horse power of the motor required to drive the pump would be |
| A. | 40-50 HP |
| B. | 50-60 HP |
| C. | 60-70 HP |
| D. | 30-40 HP |
| E. | 20-30 HP |
| Answer» C. 60-70 HP | |
| 456. |
Which process will improve the fatigue life of a part? |
| A. | Electrocoating |
| B. | Chemical coating |
| C. | Shot peening |
| D. | Polishing |
| E. | Electroplating |
| Answer» C. Shot peening | |
| 457. |
Addendum is |
| A. | The depth of a gear tooth |
| B. | Half the depth of a gear tooth |
| C. | Depth of tooth space below the pitch circle |
| D. | Height by which tooth projects beyond the pitch circle |
| E. | None of the above |
| Answer» D. Height by which tooth projects beyond the pitch circle | |
| 458. |
Commonly adopted material for rivets in |
| A. | Mild steel |
| B. | Cast iron |
| C. | Wrought iron |
| D. | Malleable iron |
| E. | None of the above |
| Answer» A. Mild steel | |
| 459. |
When power is to be transmitted by two pulleys of different materials, then design will be based on pulley |
| A. | Having smaller diameter |
| B. | Having larger diameter |
| C. | Having ( |
| D. | Having ( |
| E. | Any of the above |
| Answer» D. Having ( | |
| 460. |
Two springs having stiffness are in series. The equivalent stiffness would be |
| A. | K |
| B. | K/4 |
| C. | 4 K |
| D. | 2 K |
| E. | K/2 |
| Answer» E. K/2 | |
| 461. |
In case of ductile materials the theory of elastic failure generally applied is |
| A. | Maximum shear stress theory |
| B. | Maximum principal stress theory |
| C. | Distortion energy theory |
| D. | Maximum strain theory |
| E. | Maximum total strain energy theory |
| Answer» A. Maximum shear stress theory | |
| 462. |
Washer are generally specified by |
| A. | Thickness |
| B. | Outer diameter |
| C. | Central hole diameter |
| D. | Mean diameter |
| E. | (A) and (C) above |
| Answer» C. Central hole diameter | |
| 463. |
A coupling used to connect two perfectly aligned shafts is |
| A. | bush pin coupling |
| B. | Oldham coupling |
| C. | rigid tlange coupling |
| D. | none of the above |
| E. | Cast steel |
| Answer» C. rigid tlange coupling | |
| 464. |
Full stress reversal normally does not occur in bolted connections due to |
| A. | surface hardness |
| B. | ridges and valleys in the form of threads |
| C. | varying cross-section |
| D. | Increasing the diameter of threaded portion |
| E. | pre-loading during tightening |
| Answer» E. pre-loading during tightening | |
| 465. |
The frictional horse power loss in a bearing having 25 mm diameter subjected to a load of 200 kg rotating at 600 rpm will be of the order of |
| A. | 2HP |
| B. | 0.05 HP |
| C. | 1 HP |
| D. | 0.5 HP |
| E. | 10 HP |
| Answer» B. 0.05 HP | |
| 466. |
If the Brinell hardness number of a sample of steel is 200, the ultimate tensile strength will be approximately |
| A. | Cannot be determined |
| B. | 70 kgf/mm2 |
| C. | 200 kgf/mm2 |
| D. | 100 kgf/mm2 |
| E. | Silver |
| Answer» B. 70 kgf/mm2 | |
| 467. |
Which of the following key is used for light work? |
| A. | Round key |
| B. | Increasing the diameter of threaded portion |
| C. | Tangent key |
| D. | Sunk key |
| E. | Saddle key |
| Answer» E. Saddle key | |
| 468. |
For butt welding of two plates, each of which is 300 cm thick, the best process would be |
| A. | Submerged are welding |
| B. | MIG welding |
| C. | TIG welding |
| D. | Gas welding |
| E. | Electro slag welding |
| Answer» E. Electro slag welding | |
| 469. |
The number of possible independency mechanisms, n is determined from the following relationship |
| A. | n = 2 N - r |
| B. | n = 2 N + r |
| C. | Increasing the diameter of threaded portion |
| D. | n = N + r |
| E. | n = N - r |
| Answer» E. n = N - r | |
| 470. |
In as steam engine, piston rod is connected to the cross head by |
| A. | flange coupling |
| B. | universal coupling |
| C. | cotter joint |
| D. | knuckle joint |
| E. | Increasing the diameter of threaded portion |
| Answer» C. cotter joint | |
| 471. |
For water tight joints such as in boiler the rivets are driven |
| A. | Increasing the diameter of threaded portion |
| C. | either in hot or cold condition |
| D. | in cold condition only |
| E. | in hot condition only |
| Answer» E. in hot condition only | |
| 472. |
Iniversal coupling is |
| A. | Used for collinear shafts |
| B. | Rigid coupling |
| C. | Type of flange coupling |
| D. | Used for non-collinear shafts |
| E. | None of the above |
| Answer» D. Used for non-collinear shafts | |
| 473. |
Ball bearing type screws are generally used |
| A. | In bench vices |
| B. | In screw jacks |
| C. | In earthmoving machinery |
| D. | Steering mechanisms |
| E. | None of the above |
| Answer» D. Steering mechanisms | |
| 474. |
The maximum size of the fillet weld that can be made in single pass is |
| A. | 12 mm |
| B. | 3 mm |
| C. | Increasing the diameter of threaded portion |
| D. | 8 mm |
| E. | 6 mm |
| Answer» D. 8 mm | |
| 475. |
Friction losses in spur gears may be of the order of |
| A. | 15% to 20% |
| B. | 20% to 30% |
| C. | 5% to 10% |
| D. | 10% to 15% |
| E. | Less than 5% |
| Answer» E. Less than 5% | |
| 476. |
Which of the following equipment operates at higher speeds as compared to the remaining? |
| A. | Steam turbines |
| B. | Automobiles |
| C. | Diesel engines |
| D. | Machine tools |
| E. | Fram machinery |
| Answer» A. Steam turbines | |
| 477. |
Flexible shafts are made of |
| A. | thin mild steel rod |
| B. | Increasing the diameter of threaded portion |
| D. | hollow mild steel rod |
| E. | wavy steel wires |
| Answer» E. wavy steel wires | |
| 478. |
An automobile gear box has |
| A. | Simple gear train |
| B. | Compound gear train |
| C. | Epicycle gear train |
| D. | Compound epicyclic gear train |
| E. | None of the above |
| Answer» B. Compound gear train | |
| 479. |
Rivets are |
| A. | Heated before inserting in position |
| B. | Heated after inserting in position |
| C. | Not heated at all |
| D. | Cold forged |
| E. | None of the above |
| Answer» A. Heated before inserting in position | |
| 480. |
A starter in automobile is generally |
| A. | Single phase a.c.motor |
| B. | dc shunt motor |
| C. | dc series motor |
| D. | dc compound motor |
| E. | None of the above |
| Answer» C. dc series motor | |
| 481. |
The holding power of sunk key is due to the resistance it differs in |
| A. | shear and crushing |
| B. | Cast steel |
| C. | crushing only |
| D. | tension only |
| E. | shear only |
| Answer» A. shear and crushing | |
| 482. |
Screw parts with a right hand thread must only be stressed |
| A. | In the direction of screwing in |
| B. | In the direction of screwing out |
| C. | In the direction normal to the screw axis |
| D. | In the shear plane |
| E. | In the plane of principal axis |
| Answer» A. In the direction of screwing in | |
| 483. |
Resilience of material should be considered when it is subjected to |
| A. | Fluctuating load |
| B. | Wear and tear |
| C. | Shock loading |
| D. | Any of the above |
| E. | None of the above |
| Answer» C. Shock loading | |
| 484. |
Which of the following drive cannot be used for driving cam shaft of a four stroke intemal cambustion engine? |
| A. | Spur gear drive |
| B. | Helical gear drive |
| C. | Chain drive |
| D. | V-belt drive |
| E. | None of the above |
| Answer» D. V-belt drive | |
| 485. |
In an open belt-pulley drive the bodily slip occurs |
| A. | first at larger pulley |
| B. | first at smaller pulley |
| C. | simultaneously on both the pulleys |
| D. | none of the above |
| E. | Cast steel |
| Answer» C. simultaneously on both the pulleys | |
| 486. |
Poisson's ratio for steel is |
| A. | 0.33 |
| B. | 0.27 |
| C. | 0.1 |
| D. | 1 |
| E. | None of the above |
| Answer» B. 0.27 | |
| 487. |
Maximum principal stress theory for the failure of a material at elastic point, is knowns as |
| A. | Von Mises theory |
| B. | Rankines theory |
| C. | Haig's theory |
| D. | Guest's or Tresca's theory |
| E. | Increasing the diameter of threaded portion |
| Answer» B. Rankines theory | |
| 488. |
The maximum thickness of the plates used in pressed steel tanks is |
| A. | Increasing the diameter of threaded portion |
| B. | 3 mm |
| C. | 5 mm |
| D. | 6 mm |
| E. | 4 mm |
| Answer» C. 5 mm | |
| 489. |
The minor-diameter cross-section of the portion of the screw between the nut and the thrust bearing is subjected to |
| A. | Tension |
| B. | Compression |
| C. | Shear |
| D. | Torque |
| E. | Biaxial stress |
| Answer» E. Biaxial stress | |
| 490. |
In case of rolled steel beams, the chear force is resisted by |
| A. | Increasing the diameter of threaded portion |
| B. | flanges only |
| C. | web only |
| D. | web and flanges together |
| E. | top flange only |
| Answer» C. web only | |
| 491. |
A reverted gear train is one in which |
| A. | The direction of rotation of first and last gear is the same |
| B. | The direction of rotation of first and last gear is opposite |
| C. | The first and last gear are on the same shaft |
| D. | The first and the last gear are essentially on separate but parallel shafts |
| E. | None of the above |
| Answer» C. The first and last gear are on the same shaft | |
| 492. |
In an extra humid atmosphere which one of the following motor would you select? |
| A. | Semi-protected |
| B. | Drip proof |
| C. | Totally enclosed fan cooled |
| D. | Open type |
| E. | Fan cooled |
| Answer» C. Totally enclosed fan cooled | |
| 493. |
A Babbitt is |
| A. | A eutcctic of iron and iron phosphide |
| B. | A gadget for measuring volume |
| C. | A measure of magnetic induction produced in a material |
| D. | Antimony bearing lead or tia alloy |
| E. | None of the above |
| Answer» D. Antimony bearing lead or tia alloy | |
| 494. |
Fine scratches assist in librication in |
| A. | thin film lubrication |
| B. | thick film lubrication |
| C. | both (A) and (B) above |
| D. | none of the above |
| E. | Increasing the diameter of threaded portion |
| Answer» A. thin film lubrication | |
| 495. |
The ultimate strength design of steel structures makes use of |
| A. | elastic and plastic analysis of structures |
| B. | Increasing the diameter of threaded portion |
| C. | plastic analysis of structures |
| D. | ultimate analysis |
| E. | elastic analysis of structures |
| Answer» E. elastic analysis of structures | |
| 496. |
Which steel will have maximum percentage of carbon? |
| A. | 20 Cr 18 Ni 2 |
| B. | 15 Cr 65 |
| C. | C 14 |
| D. | 40 Cr 40 |
| E. | C 15 |
| Answer» D. 40 Cr 40 | |
| 497. |
While designing a warm and a worm wheel the sign should be governed by |
| A. | Worm |
| B. | Worm wheel |
| C. | Any one of the two |
| D. | Standards designs should be followed |
| E. | None of the above |
| Answer» A. Worm | |
| 498. |
If the stress at elastic limit is Se, then the modulus of resistance is proportional to |
| A. | (Se) |
| B. | (Se)1/2 |
| C. | (Se)2 |
| D. | Se |
| E. | (Se)2/2 |
| Answer» A. (Se) | |
| 499. |
The gears used for non-intersecting perpendicular shafts are |
| A. | Herringbone gears |
| B. | Helical gears |
| C. | Spur gears |
| D. | Hypoid gears |
| E. | Double helical gears |
| Answer» D. Hypoid gears | |
| 500. |
Fine thread with 16 mm nominal diameter and 1.5 mm pitch is designed as |
| A. | M 1.5 x 16 |
| B. | M 16 x 1.5 |
| C. | M 16 |
| D. | none of the above |
| E. | Cast steel |
| Answer» B. M 16 x 1.5 | |
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