Question Bank for Railways NTPC (Technical Ability) Tool Engineering Tool Engineering

List-I(A function connected with NC m/c tool)		List-II (Associate parameter)
A.	interpolation	1.	Tape preparation
B.	Parity check	2.	Canned cycle
C.	Preparatory function	3.	Drilling
D.	Point-to-point	4.	Controlling
		5.	Turning

Codes:

A)

A\[\to \]4, B\[\to \]1, C\[\to \]2, D\[\to \]3

B)

A\[\to \]4, B\[\to \]1, C\[\to \]2, D\[\to \]5

C)

A\[\to \]5, B\[\to \]1, C\[\to \]3, D\[\to \]2

D)

A\[\to \]1, B\[\to \]4, C\[\to \]3, D\[\to \]2

View Solution

25)

Consider the following characteristics of production jobs;

1. Processing of parts frequently in small lots

2. Need to accommodate design changes of products

3. Low rate of metal removal

4. Need for holding close tolerances

The characteristics which favour the choice of numerically controlled machines would include:

A)

1, 2 and 3

B)

2, 3 and 4

C)

1, 3 and 4

D)

1, 2 and 4

View Solution

26)

In APT language, the cutter motion in incremental coordinate mode is addressed as:

A)

GO/TO/

B)

GO/TO

C)

GO DLTA/

D)

GO FWD7

View Solution

27)

Match List-I with List-II and select the correct answer using the codes given below the lists:

List-I (Task)		List-II (Recommendation)
A.	Three components in a straight line should work in one loading	1.	Clamp with a floating pad
B.	Unloading of clamp element from jig is essential	2.	Quick action
C.	Clamping of rough surface	3.	Cam clamp
D.	Need for heavy clamping force	4.	Equalizing clamp
		5.	Strap clamp

Codes:

A)

A\[\to \]5, B\[\to \]2, C\[\to \]3, D\[\to \]4

B)

A\[\to \]4, B\[\to \]2, C\[\to \]1, D\[\to \]5

C)

A\[\to \]1, B\[\to \]4, C\[\to \]2, D\[\to \]3

D)

A\[\to \]4, B\[\to \]1, C\[\to \]5, D\[\to \]3

View Solution

28)

If the diameter of the hole is subject to considerable variation, then for locating in jigs and fixtures, the pressure type of locator used is:

A)

Conical locator

B)

cylindrical locator

C)

Diamond pin locator

D)

vee locator

View Solution

29)

In manual programming and tape preparation for an NC drilling machine, the spindle speed was coded as S 684 (using the magic-three code). The spindle speed in rpm will be:

A)

684

B)

68.4

C)

840

D)

6840

View Solution

30)

Which of the following pairs are correctly matched?

1. CNC machine......... Post processor.

2. Machining centre........... Tool magazine

3. DNC.......... FMS

A)

1, 2 and 3

B)

1 and 2

C)

1 and 3

D)

2 and 3

View Solution

31)

Which of the following is/are the advantage (s) of numerical control of machine tools?

1. Reduced lead time

2. Consistently good quality

3. Elaborate fixtures are not required

A)

2 and 3

B)

1 and 2

C)

1 alone

D)

1 and 3

View Solution

32)

Consider the following statements:

The cutter setting block in a milling fixture

1. Sets the cutting tool with respect to two of its surface

2. Limits the total travel required by the cutter during machining

3. Takes location from the location scheme of component.

Out of these statements:

A)

1, 2 and 3 are correct

B)

1 and 2 are correct

C)

2 and 3 are correct

D)

1 and 3 are correct

View Solution

33)

The type of quick return mechanism employed mostly in shaping machines is:

A)

DC reversible motor

B)

Fast and loose pulleys

C)

Whitworth motion

D)

Slotted link mechanism

View Solution

34)

Which of the following arc valid statements for point-to-point motion of the tool in APT language?

1. GO/TO/.......

2. GODLTA/.........

3. GO/TO.......

Select the correct answer using the codes given below:

A)

1 and 2

B)

2 and 3

C)

1 and 3

D)

1, 2 and 3

View Solution

35)

Match List-I with List-II and select the correct answer using the codes given below the lists:

List-I (Track numbers on paper tape)		List-II (Holes on those tracks represent)
A.	Track nos. 1 to 4	1.	Alphabets
B.	Track no. 5	2.	Numerals
C.	Track nos. 6 and 7	3.	End of block
D.	track no. 8	4.	Block number
		5.	Parity check

Codes:

A)

A\[\to \]2, B\[\to \]5, C\[\to \]1, D\[\to \]3

B)

A\[\to \]1, B\[\to \]4, C\[\to \]2, D\[\to \]5

C)

A\[\to \]2, B\[\to \]4, C\[\to \]1, D\[\to \]3

D)

A\[\to \]1, B\[\to \]5, C\[\to \]2, D\[\to \]3

View Solution

36)

One of the pins in a dual pin locator of a jig or fixture is shaped as a "diamond pin locator" because:

A)

Diamond pin does not wear fast

B)

It is easy to clamp

C)

Any variation between the centres of the hole is taken care of

D)

It will be easy to machine afterwards when the locator is worn out.

View Solution

37)

In tape preparation for an NC machine tool the code S 624 would represent spindle speeds of:

A)

624 rpm, 240 rpm and 246 rpm

B)

624 rpm and 240 rpm

C)

624 rpm and 246 rpm

D)

240 rpm and 246 rpm

View Solution

38)

Which of the following are the rules of programming NC machine tools in APT language?

1. Only capital letters are used

2. A period is placed at the end of each statement

3. Insertion of space does not affect the APT word.

Select the correct answer using the codes given below:

A)

1 and 2

B)

2 and 3

C)

1 and 3

D)

1 alone

View Solution

39)

Transfer machines can be denned as:

A)

Material processing machines

B)

Material handling machines

C)

Material processing and material handling machines

D)

Component feeders for automatic assembly

View Solution

40)

Consider the following statements regarding numerically controlled machine tools:

1. They reduce non-productive time

2. They reduce fixturing

3. They reduce maintenance cost.

Which of these statements are correct?

A)

1, 2 and 3

B)

1 and 2

C)

2 and 3

D)

1 and 3

View Solution

41)

Diamond pin location is used in a fixture because:

A)

It does not wear out

B)

It takes care of any variation in centre distance between two holes

C)

It is easy to clamp the part on diamond pins

D)

It is easy to manufacture

View Solution

42)

Consider the following characteristics of a robot:

1. The tip of the robot arm moves from one point to another with its in between path not being defined.

2. It can be used for drilling holes at different points in a work-piece.

3. It can be used for V butt joint welding between two points.

4. The memory capacity required for its control unit is low.

Which of these are the characteristics associated with a point-to-point robot?

A)

1 and 2

B)

1, 3 and 4

C)

1, 2 and 4

D)

2, 3 and 4

View Solution

43)

Match List-I (Components used in jigs and fixtures) with List-II (Their functions) and select the correct answer using the codes given below the lists:

List-I		List-II
A.	Jack pin	1.	To guide the drill hit during machining
B.	V-locator	2.	For easy removal of the work-piece from the jig or fixture after the machining operation is over
C.	Bushes	3.	To locate the circular or semicircular objects in a jig or fixture
D.	Ejectors	4.	To locate work-pieces whose dimensions are subject to variations

Codes:

A)

A\[\to \]3, B\[\to \]4, C\[\to \]1, D\[\to \]2

B)

A\[\to \]3, B\[\to \]4, C\[\to \]2, D\[\to \]1

C)

A\[\to \]4, B\[\to \]3, C\[\to \]1, D\[\to \]2

D)

A\[\to \]4, B\[\to \]3, C\[\to \]2, D\[\to \]1

View Solution

44)

The indexing of the turret in a single-spindle automatic lathe is done using:

A)

Geneva mechanism

B)

Ratchet and Pawl mechanism

C)

Rack and pinion mechanism

D)

Whitworth mechanism

View Solution

45)

Which one of the following sets of elements are quick-acting clamping elements for fixtures?

A)

Wedge and Cam

B)

Cam and Toggle

C)

Toggle and Wedge

D)

Wedge, Cam and Toggle

View Solution

46)

16 Match List-I (NC machine tool systems) with List-II (Features) and select the correct answer using the codes given below the lists:

List-I		List-II
A.	NC system	1.	It has an integrated automatic tool changing unit and a component indexing device
B.	CNC system	2.	A number of machine tools arc controlled by a computer. No tape reader, the part programme is transmitted directly to the machine tool from the computer memory
C.	DNC system	3.	The controller consists of soft-wired computer and hard-wired logic system. Graphic display of tool path is also possible
D.	Machining centre	4.	The instruction on tape is prepared inbinary decimal form and operated by a series, of coded instructions

Codes:

A)

A\[\to \]4, B\[\to \]2, C\[\to \]3, D\[\to \]1

B)

A\[\to \]1, B\[\to \]3, C\[\to \]2, D\[\to \]4

C)

A\[\to \]4, B\[\to \]3, C\[\to \]2, D\[\to \]1

D)

A\[\to \]1, B\[\to \]2, C\[\to \]3, D\[\to \]4

View Solution

47)

In a machine tool gear box, the smallest and largest spindles are 100 rpm and 1120 rpm respectively. If there are 8 speeds in all, the fourth speed will be:

A)

400 rpm

B)

280 rpm

C)

800 rpm

D)

535 rpm

View Solution

48)

In a CNC machine tool, encoder is used to sense and control:

A)

Table position

B)

table velocity

C)

Spindle speed

D)

coolant flow

View Solution

49)

Which one of the following mechanisms is employed for indexing of turret in an automatic lathe?

A)

Whitworth

B)

Rack and pinion

C)

Ratchet and Pawl

D)

Geneva wheel

View Solution

50)

If the earliest starting time for an activity is 8 weeks, the latest finish time is 37 weeks and the duration time of the activity is 11 weeks, then the total float is equal to:

A)

18 weeks

B)

14 weeks

C)

56 weeks

D)

40 weeks

View Solution

51)

Match List-I (An element of jigs and fixtures) with List-II (Association system) and select the correct answer using the codes given below the lists:

List-I (An element of jigs and fixtures)		List-II (Association system)
A.	Bush	1.	Milling fixture
B.	Setting block	2.	Turning fixture
C.	Diamond pin	3.	Radial location
D.	V-block	4.	Cylindrical location
		5.	Drill jigs

Codes:

A)

A\[\to \]5, B\[\to \]4, C\[\to \]3, D\[\to \]1

B)

A\[\to \]3, B\[\to \]1, C\[\to \]2, D\[\to \]4

C)

A\[\to \]5, B\[\to \]1, C\[\to \]3, D\[\to \]4

D)

A\[\to \]3, B\[\to \]4, C\[\to \]2, D\[\to \]1

View Solution

52)

Which one of the following is the most significant property to be considered in the selection of material for the manufacture of locating pins and drill jig bushes used in jigs and fixtures?

A)

Wear resistance

B)

elasticity

C)

Shear strength

D)

tensile strength

View Solution

53)

Consider the following alignment tests on machine tools:

Which of the above alignment tests on machine tools are common to both lathe and shaper?

A)

1 and 2

B)

2 and 3

C)

3 and 4

D)

1 and 4

View Solution

54)

Which item best describes a CAM technology?

A)

Geometric modelling

B)

Documentation

C)

Drafting

D)

Numerical control

View Solution

55)

Flexible manufacturing allows for:

A)

Tool design and production

B)

Automated design

C)

Quick and inexpensive product

D)

Quality control.

View Solution

56)

Which one of the following is the third basic component of robots besides power supply and control (memory) console?

A)

Software

B)

Coaxial cable

C)

Mechanical unit arm

D)

Microcomputer

View Solution

57)

What are the main components of an NC machine?

1. Part program

2. Machine control unit

3. Servo meter

Select the correct answ.er using the code given below:

A)

1, 2 and 3

B)

1 and 2 only

C)

2 and 3 only

D)

1 and 3 only

View Solution

58)

According to the principle of location in jigs and fixtures, how many degrees of freedom are to be eliminated to have a body fixed in space?

A)

3

B)

4

C)

5

D)

6

View Solution

59)

Which of the following are the rules of programming NC machine tools in APT language?

1. Only capital letters are used

2. A period is placed at the end of each statement

3. Insertion of space does not affect the APT word.

Select the correct answer using the codes given below;

A)

1 and 2

B)

2 and 3

C)

1 and 3

D)

1 alone

View Solution

60)

A "block" of information in NC machine program means:

A)

One row on tape

B)

A word comprising several rows on tape

C)

One complete instruction

D)

One complete program for a job

View Solution

61)

The floating position of the holding fixture in a rotary transfer device is used to:

A)

Improve the accuracy of location

B)

Reduce the tendency to over-index

C)

Reduce the cycle time

D)

Improve upon the acceleration and deceleration characteristics

View Solution

62)

Consider the following statements regarding numerically controlled machine tools:

1. They reduce non-productive time

2. They reduce fixturing

3. They reduce maintenance cost

Which of these statements are correct?

A)

1, 2 and 3

B)

1 and 2

C)

2 and 3

D)

1 and 3

View Solution

63)

In computer aided drafting practice, an arc is denned by:

A)

Two end points only

B)

centre and radius

C)

Radius and one end point

D)

Two end points and centre

View Solution

64)

With reference to NC machines, which of the following statements is wrong:

A)

Both closed-loop and open-loop control systems are used

B)

Paper tapes, floppy tapes and cassettes are used for data storage

C)

Digitizers may be used as interactive input devices

D)

Post processor is an item of hardware

View Solution

65)

In a point-to-point type of NC system:

A)

Control of position and velocity of the tool is essential

B)

Control of only position of the tool is sufficient

C)

Control of only velocity of the tool is sufficient

D)

Neither position nor velocity need be controlled

View Solution

66)

In an NC machining operation, the tool has to be moved from point (5, 4) to point (7, 2) along a circular path with centre at (5, 2). Befoit starting the operation, the tool is at (5, 4). The correct G and M code for this motion is:

A)

N010 G03 X 7.0 Y2.0 15.0 J2.0

B)

N010 G02 X 7.0 Y2.0 15.0 J2.0

C)

N010 G01 X 7.0 Y2.0 15.0 J2.0

D)

N010 G00 X 7.0 Y2.0 15.0 J2.0

View Solution

67)

In finish machining of an island on a casting with CNC milling machine, an end mill with 10 mm diameter is employed. The comer points of the island arc represented by (0, 0), (0, 30), (50, 30) and (50, 0). by applying cutter radius right compensation, the trajectory of the cutter will be:

A)

\[(-5,\,0),\]\[(-\,5,\,35),\]\[(55,\,35),\]\[(55,\,-5),\]\[(-5,\,-5)\]

B)

\[(0,-\,5),\]\[(55,\,-5),\]\[(55,\,35),\]\[(-\,5,\,35),\]\[(-5,\,-5)\]

C)

\[(5,\,5),\]\[(5,\,25),\]\[(45,25),\]\[(45,5),\]\[(5,\,5)\]

D)

\[(5,\,5),\]\[(45,\,5),\,\]\[(45,\,25),\] \[(5,\,25),\]\[(5,\,5)\]

View Solution

68)

The product is assembled from parts A and B. The probability of defective parts A and B are 0.1 and 0.2 respectively. Then the probability of the assembly of A and B to be non-defective is:

A)

0.7

B)

0.72

C)

0.8

D)

0.85

View Solution

69)

Which of the following conditions are necessary of applying linear programming

1. There must be a well defined objective function

2. The decision variables should be interrelated and non-negative

3. The resources must be in limited supply.

A)

1 and 2 only

B)

1 and 3 only

C)

2 and 3 only

D)

1, 2 and 3

View Solution

70)

Dummy activities are used to:

A)

Determine critical path

B)

Determine project completion time

C)

Maintain the required flow in a network

D)

Facilitate computations of stack

View Solution

71)

Consider the following statements:

1. An optimum solution.

2. An initial feasible solution.

3. Vogel's approximate solution.

Of these statements:

A)

1 alone is correct

B)

Alone is 2 correct

C)

3 alone is correct

D)

2 and 3 are correct

View Solution

72)

Consider the following statements:

Linear programming model can be applied to

1. Line balancing problem

2. Transportation problem

3. Project management

Of these statements:

A)

1, 2 and 3 are correct

B)

1 and 2 are correct

C)

2 and 3 are correct

D)

1 and 3 are correct

View Solution

73)

In a \[6\times 6\] transportation problem, degeneracy would arise, it the number of filled slots were:

A)

Equal to thirty six

B)

More than twelve

C)

2 and 3 twelve

D)

less then eleven

View Solution

74)

For a M/M/T:\[\infty \]/FCFS queue, the probability of the queue size being greater than N is given by \[\lambda =\] mean arrival rate and \[\mu =\] mean service rate):

A)

\[{{\left( \frac{\lambda }{\mu } \right)}^{N}}\]

B)

\[{{\left( \frac{\mu }{\lambda } \right)}^{N}}\]

C)

\[{{\left( \mu \lambda \right)}^{N}}\]

D)

\[\mu {{\lambda }^{N}}\]

View Solution

75)

Earliest finish time can be regarded as:

A)

EST + duration of activity

B)

EST \[-\] duration of activity

C)

LFT + duration of activity

D)

LET \[-\] duration of activity

View Solution

76)

In the forging operation, fullering is done to:

A)

Draw out the material

B)

Bend the material

C)

Upset the material

D)

Extrude the material.

View Solution

77)

Which of the following assumptions are correct for cold rolling?

(1) The material is plastic

(2) The arc of contact is circular with a radius greater than the radius of the roil.

(3) Coefficient of friction is constant over the arc of contact and acts in one direction throughout the arc of contact.

Select the correct answer using the code given below:

Codes:

A)

1 and 2

B)

1 and 3

C)

2 and 3

D)

2, 2 and 3

View Solution

78)

A PERT network has three activities on critical path with mean time 3, 8 and 6, and standard deviation 1, 2 and 3 respectively. The probability that the project will be completed in 20 days is:

A)

0.50

B)

0.79

C)

0.84

D)

0.95

View Solution

79)

The software package used for computer simulation is known as:

A)

GPSS

B)

HTPM

C)

CRAFT

D)

COMSOAL

View Solution

80)

Match List I with List II and select the correct answer using the codes given below the lists:

List-I		List-II
A.	Linear programming problem	1.	Travelling salesman
B.	Queuing problem	2.	Saddle point
C.	Dynamic problem	3.	Product mix
D.	Game theory problem	4.	Normal distribution

Codes:

A)

A\[\to \]3, B\[\to \]4, C\[\to \]1, D\[\to \]2

B)

A\[\to \]4, B\[\to \]3, C\[\to \]1, D\[\to \]2

C)

A\[\to \]3, B\[\to \]4, C\[\to \]1, D\[\to \]2

D)

A\[\to \]4, B\[\to \]3, C\[\to \]2, D\[\to \]1

View Solution

81)

A simple table for a linear programming problem is given below:

5	2	3	0	0	0
\[{{X}_{1}}\]	\[{{X}_{2}}\]	\[{{X}_{3}}\]	\[{{X}_{4}}\]	\[{{X}_{5}}\]	\[{{X}_{6}}\]	Z
\[{{X}_{4}}\]	1	2	2	1	0	0	8
\[{{X}_{5}}\]	3	4	1	0	1	1	7
\[{{X}_{6}}\]	2	3	4	0	0	1	10

Which one of the following correctly indicates the combination of entering and leaving variable?

A)

\[{{X}_{1}}\] and \[{{X}_{4}}\]

B)

\[{{X}_{2}}\] and \[{{X}_{6}}\]

C)

\[{{X}_{2}}\] and \[{{X}_{5}}\]

D)

\[{{X}_{3}}\] and \[{{X}_{4}}\]

View Solution

82)

A feasible solution to the linear programming problem should:

A)

Satisfy the problem constraints

B)

Optimize the objective function

C)

Satisfy the problem constraints and non-negativity restrictions

D)

Satisfy the non-negativity restrictions

View Solution

83)

If the arrival takes place every 10 minutes with a service time 4 minutes per unit then the mean arrival rate, mean service at and the probability that one would have to wait will be respectively:

A)

10, 4 and 0.25

B)

0.1, 0.25 and 0.4

C)

10, 0.4 and 0.25

D)

0.1, 0.25 and 0.1

View Solution

84)

In a M/M/I queuing system, expected waiting time of a unit that actually waits is given y?

A)

\[\frac{\lambda }{{{\mu }^{2}}(\mu -\lambda )}\]

B)

\[\frac{\lambda }{\mu -\lambda }\]

C)

\[\frac{1}{\mu -\lambda }\]

D)

\[\frac{\lambda }{{{\mu }^{2}}(\mu -\lambda )}\]

View Solution

85)

In a connected network of 'n 'arcs (roads) joining 'm' verticals (towns), a selection of roads is taken up for resurfacing based on a minimum spanning tree of the network as being the least cost solution. This spanning tree will contain:

A)

m arcs

B)

(m + 1) arcs

C)

\[(m\,-1)\] arcs

D)

\[(m+n-1)\] arcs

View Solution

86)

For the PERT network shown in the given figure, the probability of completing the project in 27 days is?

A)

0.841

B)

0.919

C)

0,964

D)

0.977

View Solution

87)

In CPM the cost slope is determined by:

A)

\[\frac{Crash\,\,\text{cost}}{Normal\,\,\text{cost}}\]

B)

\[\frac{Crash\,\,\text{cost}-\text{Normal}\,\,\text{cost }}{Normal\,\,time-crash\,\,time}\]

C)

\[\frac{\text{Normal}\,\,\text{cost }}{Crash\,\,time}\]

D)

\[\frac{\text{Normal}\,\,\text{cost}-Crash\,\,\cos t\text{ }}{\text{Normal}\,\,time-crash\,\,time}\]

View Solution

88)

Match List-I with List-II and select the correct answer using the codes given below the lists:

List-I (O.K. technique)		List-II (Application)
A.	Linear programming	1.	Warehouse location decision
B.	Transportation	2.	Machine allocation decision
C.	Assignment	3.	Product mix decision
D.	Queuing theory	4.	Project management
		5.	Number of servers decision

Codes:

A)

A\[\to \]1, B\[\to \]2, C\[\to \]3, D\[\to \]5

B)

A\[\to \]3, B\[\to \]1, C\[\to \]2, D\[\to \]5

C)

A\[\to \]1, B\[\to \]3, C\[\to \]2, D\[\to \]5

D)

A\[\to \]3, B\[\to \]2, C\[\to \]1, D\[\to \]4

View Solution

89)

Match List-I with List-II and select the correct answer using the codes given below the list:

List-I		List-II
A.	Linear programming	1.	Ritchie
B.	Dynamic programming	2.	Dantzig
C.	C programming	3.	Bell
D.	Integer Programming	4.	Gomory

Codes:

A)

A\[\to \]2, B\[\to \]1, C\[\to \]4, D\[\to \]3

B)

A\[\to \]1, B\[\to \]2, C\[\to \]3, D\[\to \]4

C)

A\[\to \]2, B\[\to \]3, C\[\to \]1, D\[\to \]4

D)

A\[\to \]2, B\[\to \]3, C\[\to \]4, D\[\to \]1

View Solution

90)

W. The solution in a transportation model (of dimension m x n) is said to be degenerate it has?

A)

Exactly \[(m+n\,-1)\] allocations

B)

Fewer than \[(m+n\,-1)\] allocations

C)

more than \[(m+n\,-1)\] allocations

D)

\[(m\times n)\] allocations

View Solution

91)

A Solution is not a basic feasible solution in a transportation problem if after allocations:

A)

There is not closed loop

B)

There is a closed loop

C)

Total number of allocations is one less than the sum of number of sources and destinations

D)

There is degeneracy.

View Solution

92)

Which one of the following subroutines does, a computer implementations liner programming by the simplex method use?

A)

Finding a root of a polynomial

B)

Finding the determinant of a matrix

C)

Finding the Eigen values of matrix

D)

Solving a system of linear equations

View Solution

93)

If the arrival rate of units is X and the service rate is u for a waiting line system having 'm' number of service stations, then the probability of services unit being turned out in the time interval, \[(t+\nabla t):\]

A)

Zero

B)

\[\mu .\nabla .t\]

C)

\[m\,\mu .\nabla .t\]

D)

\[n\,\mu .\nabla t\]

View Solution

94)

Which of the following are the guidelines for the construction of a network diagram?

1. Each activity is represented by one and only one arrow in the network

2. Two activities can be identified by the same beginning and end events

3. Dangling must be avoided in a network diagram

4. Dummy activity consumes no time or resource.

Select the correct answer using the codes given below:

A)

1, 2 and 3

B)

1, 3 and 4

C)

1, 2 and 4

D)

2, 3 and 4

View Solution

95)

A strip is to rolled from a thickness of 30 mm to 15 mm using a two-high mill having rolls of diameter 300 mm. The coefficient of friction for unaided bite should nearly be:

A)

0.95

B)

0.5

C)

0.25

D)

0.07

View Solution

96)

Consider the following aspects:

The advantages of computers include:

A)

1, 2 and 3

B)

2 and 4

C)

1, 3 and 4

D)

1, 2, 3 and 4

View Solution

97)

When there are 'm' rows and 'n' columns in a transposition problem, degeneracy is said to occur when the number of allocations is:

A)

Less than \[(m+n\,-1)\]

B)

Greater than \[(m+n\,-1)\]

C)

Equal to \[(m\,-n\,-1)\]

D)

Less than \[(m\,-n\,-1)\]

View Solution

98)

Consider the following linear programming problem:

Max, \[Z=2A+3B,\] Subject to \[A+B\le 10,\] \[4A+6B\le 30,\] \[2A+B\le 17,\] \[A,\,B\ge 0\]

What can one say about the solution?

A)

It may contain alternative optima

B)

The solution will unbounded

C)

The solution will be degenerate

D)

It cannot be solved by simplex method

View Solution

99)

Consider two queueing disciplines in a single server queue. Case 1 has a first come first served discipline and case 2 has a last come first served discipline. If the average waiting times in the two cases are \[{{W}_{1}}\] and \[{{W}_{2}}\] respectively, then which one of the following inferences would be true?

A)

\[{{W}_{1}}>{{W}_{2}}\]

B)

\[{{W}_{1}}<{{W}_{2}}\]

C)

\[{{W}_{1}}={{W}_{2}}\]

D)

Data insufficient to draw any tangible inference

View Solution

100)

In a single server queue customers are served a at rate of u. If W and \[{{W}_{q}}\] represent the mean waiting time in the system and mean waiting time in the queue respectively, then W will be equal to?

A)

\[{{W}_{q}}-\mu \]

B)

\[{{W}_{q}}+\mu \]

C)

\[{{W}_{q}}+1/\mu ,\]

D)

\[{{W}_{q}}-1/\mu \]

View Solution

101)

A horizontal beam is carrying uniformly distributed load supported with equal overhangs as shown in the given figure

The resultant bending moment at the mid-span shall be zero if a/b is:

A)

3/4

B)

2/3

C)

1/2

D)

1/3

View Solution

102)

Two identical springs labelled as 1 and 2 are arranged in series and subjected to force F as shown in the given figure.

Assume that each spring constant is K. The strain energy stored in spring 1 is:

A)

\[{{\text{F}}^{\text{2}}}\text{/2K}\]

B)

\[{{\text{F}}^{\text{2}}}\text{/4K}\]

C)

\[{{\text{F}}^{\text{2}}}\text{/8K}\]

D)

\[{{\text{F}}^{\text{2}}}\text{/16}\,\text{K}\]

View Solution

103)

The given figure (all dimensions are in mm) shows an I-section of the beam

The shear stress at point P (very close to the bottom of the flange) is 12 MPa. The stress at point Q in the web (very close to the flange) is:

A)

Indeterminable due to incomplete data

B)

60 MPa

C)

18 MPa

D)

12 MPa

View Solution

104)

The given figure shows the Klein's construction for acceleration of the slider-crank mechanism. Which one of the following quadrilaterals represents the required acceleration diagram?

A)

ORST

B)

OPST

C)

ORWT

D)

ORPT

View Solution

105)

Match List-I (Methods) with List-II (Applications) and select the correct answer using the codes given below the lists:

List-I		List-II
A.	Breakeven analysis	1.	To provide different facility at different
B.	Transportation	2.	To take action from among the paths with uncertainty.
C.	Assignment problem	3.	To choose between different methods of Manufacture
D.	Decision tree	4.	To determine the location of the additional plant

Codes: