Olete.in – MCQs, Mock Tests & Government Job Prep | Angular 6 Angular 6 Mcq Question Set 1

AngularJS is perfect for?

1. SPAs
2. MPAs
3. DPAs
4. CPAs

✅ Correct Answer: 1

Do AngularJS provide reusable components?

1. Yes
2. no
3. all of the above
4. None of the mentioned

✅ Correct Answer: 1

Which of the following statement is true for AngularJS?

1. AngularJS is a closed-source front-end web framework
2. AngularJS is an open-source front-end web framework
3. AngularJS is an open-source backend web framework
4. AngularJS is a closed-source back-end web framework

✅ Correct Answer: 2

AngularJS expressions bind AngularJS data to HTML like which of the following directive?

1. ng-repeat
2. ng-bind
3. ng-app
4. ng-model

✅ Correct Answer: 2

Which of the following can be used as a prefix for Directive?

1. data-
2. ng-
3. All of the mentioned
4. None of the mentioned

✅ Correct Answer: 3

What is a Model in MVC?

1. the lowest level of the pattern responsible for maintaining data
2. represents server-side data
3. represents data stored in a database
4. None of the mentioned

✅ Correct Answer: 1

Being a JavaScript-only framework, applications written in AngularJS are not safe and secure.

1. false
2. true
3. all of the above
4. None of the mentioned

✅ Correct Answer: 2

Which of the following statement is correct about data binding in AngularJS?

1. Automatic synchronization of data between model and view components
2. Automatic synchronization of data between model and controller components
3. Technique to save html data in the database
4. Technique to bind database data to html control

✅ Correct Answer: 1

The rate of change of angular position of the body is called as _____

1. Angular displacement
2. Angular velocity
3. Angular acceleration
4. distance code

✅ Correct Answer: 2

When an element moves in a flow field it translates, it also rotates along a streamline and in addition, its shape may undergo distortion.

1. True
2. False
3. all of the above
4. None of the mentioned

✅ Correct Answer: 1

The angular velocity can be given by ______

1. ω = 0.5(dθ1/dt + dθ2/dt)
2. ω = (dθ1/dt + dθ2/dt)
3. ω = 4(dθ1/dt + dθ2/dt)
4. ω = 8(dθ1/dt + dθ2/dt)

✅ Correct Answer: 1

The term 2*ω is called as _______

1. Velocity
2. Divergence
3. Angular velocity
4. Vorticity

✅ Correct Answer: 4

The curl of velocity equals to _______

1. velocity
2. pressure
3. vorticity
4. angular velocity

✅ Correct Answer: 3

If ∇*V is not equal to zero, then the flow is ____

1. steady
2. unsteady
3. rotational
4. irrotational

✅ Correct Answer: 3

If ∇*V is equal to zero, then the flow is _____

1. steady
2. unsteady
3. rotational
4. irrotational

✅ Correct Answer: 4

The subsonic flow over an airfoil is an example of ___

1. steady
2. unsteady
3. rotational
4. irrotational

✅ Correct Answer: 4

The angle between the two lines (x and y direction) is called as _____

1. viscous layer
2. strain
3. stress
4. velocity vector

✅ Correct Answer: 2

The absence of vorticity means the flow is _____

1. steady
2. unsteady
3. rotational
4. irrotational

✅ Correct Answer: 4

If the crank and the connecting rod are 300 mm and 1 m long respectively and the crank rotates at a constant speed of 250 r.p.m., determine the crank angle at which the maximum velocity occurs is ____

1. 45
2. 75
3. 90
4. 60

✅ Correct Answer: 2

If the crank and the connecting rod are 600 mm and 2 m long respectively and the crank rotates at a constant speed of 250 r.p.m, determine maximum velocity of the piston in m/s is _____

1. 15
2. 17.5
3. 20
4. 10.5

✅ Correct Answer: 2

he crank and connecting rod of a steam engine are 0.3 m and 1.5 m in length. The crank rotates at 150 r.p.m. clockwise, determine velocity of the piston when the crank is at an angle 40 degrees from IDC.

1. 4.19
2. 5
3. 3.49
4. 3.36

✅ Correct Answer: 3

From the data given: Crank and connecting rod of a steam engine are 0.3 m and 1.5 m in length; The crank rotates at 150 r.p.m. clockwise. Determine the acceleration in m/s2 of the piston for the same position(angle 40 degrees from IDC).

1. 59.27
2. 55.25
3. 65.3
4. 50.41

✅ Correct Answer: 1

Which of the following expression represent the angular acceleration α of the connecting rod?

1. −ω2 . sin θ/n
2. −ω2 . cos θ.n
3. ω2. cos θ/n
4. ω2 . sin θ.n

✅ Correct Answer: 1

In a slider crank mechanism, the length of the crank and connecting rod are 150 mm and 600 mm respectively. The crank position is 60° from inner dead centre. The crank shaft speed is 400 r.p.m. (clockwise). Velocity of the slider is ________

1. 6.9 m/s
2. 6.12 m/s
3. 7.32 m/s
4. 6.66 m/s

✅ Correct Answer: 2

From the data given: The length of the crank and connecting rod are 150 mm and 600 mm The crank position is 60° from inner dead centre. The crank shaft speed is 400 r.p.m. Find the acceleration in m/s2 of the slider.

1. 101.5
2. 100.6
3. 98.6
4. 97.6

✅ Correct Answer: 3

From the data given: The length of the crank and connecting rod are 150 mm and 600 mm The crank position is 60° from inner dead centre. The crank shaft speed is 400 r.p.m. Find the angular acceleration in rad/s2 of the connecting rod.

1. 421
2. 400
3. 379
4. 388

✅ Correct Answer: 3

While calculating angular acceleration of the connecting rod, sin2(θ) term is neglected.

1. True
2. False
3. all of the above
4. None of the mentioned

✅ Correct Answer: 1

In a slider crank mechanism, the length of the crank and connecting rod are 180 mm and 540 mm respectively. The crank position is 45° from inner dead centre. The crank shaft speed is 450 r.p.m. (clockwise), calculate angular velocity of the connecting rod in rad/s.

1. 10.3
2. 11.1
3. 12.2
4. 11.8

✅ Correct Answer: 2

Force which does not act on the connecting rod is ______

1. Weight of connecting rod
2. Inertia force of connecting rod
3. Radial force
4. Coriolis force

✅ Correct Answer: 4

Inertia forces on the reciprocating parts acts along the line of stroke.

1. True
2. False
3. all of the above
4. None of the mentioned

✅ Correct Answer: 1

When mass of the reciprocating parts is neglected then the inertia force is _____

1. Maximum
2. Minimum
3. 0
4. Not defined

✅ Correct Answer: 3

For a steam engine, the following data is given: Piston diameter = 0.24 m, length of stroke = 0.6 m, length of connecting rod = 1.5 m, mass of reciprocating parts = 300 kg, mass of connecting rod = 250 kg; speed of rotation = 125 r.p.m ; centre of gravity of connecting rod from crank pin = 0.5 m ; Kg of the connecting rod about an axis through the centre of gravity = 0.65 m calculate inertia force at θ=30 degrees from IDC.

1. 19000 N
2. 19064 N
3. 19032 N
4. 20064 N

✅ Correct Answer: 2

Piston diameter = 0.24 m, length of stroke = 0.6 m, length of connecting rod = 1.5 m, mass of reciprocating parts = 300 kg, mass of connecting rod = 250 kg; speed of rotation = 125 r.p.m; centre of gravity of connecting rod from crank pin = 0.5 m ; Kg of the connecting rod about an axis through the centre of gravity = 0.65 m Find the equivalent length L of a simple pendulum swung about an axis.

1. 1.35 m
2. 1.42 m
3. 1.48 m
4. 1.50 m

✅ Correct Answer: 2

From the data given: Piston diameter = 0.24 m, length of stroke = 0.6 m, length of connecting rod = 1.5 m, mass of reciprocating parts = 300 kg, mass of connecting rod = 250 kg; speed of rotation = 125 r.p.m ; centre of gravity of connecting rod from crank pin = 0.5 m ; Kg of the connecting rod about an axis through the centre of gravity = 0.65 m Find the correcting couple in N-m?

1. 52.7
2. 49.5
3. 59.5
4. 56.5

✅ Correct Answer: 3

Piston diameter = 0.24 m, length of stroke = 0.6 m, length of connecting rod = 1.5 m, mass of reciprocating parts = 300 kg, mass of connecting rod = 250 kg; speed of rotation = 125 r.p.m; centre of gravity of connecting rod from crank pin = 0.5 m ; Kg of the connecting rod about an axis through the centre of gravity = 0.65 m Find angular acceleration of connecting rod in rad/s2.

1. 16.782
2. 17.824
3. 15.142
4. 17.161

✅ Correct Answer: 2

Torque due to weight of the connecting rod affects the torque due to connecting rod.

1. True
2. False
3. all of the above
4. None of the mentioned

✅ Correct Answer: 2

The net force acting on the crosshead pin is known as _____

1. Crank pin effort
2. Crank effort
3. Piston effort
4. Shaft effort

✅ Correct Answer: 3

Piston effort acts along the line of stroke.

1. True
2. False
3. all of the above
4. None of the mentioned

✅ Correct Answer: 1

In a horizontal engine, reciprocating parts are accelerated when the piston moves from _______

1. TDC to BDC
2. BDC to TDC
3. Midway to TDC
4. BDC to midway

✅ Correct Answer: 1

In a horizontal engine, reciprocating parts are retarded when the piston moves from _____

1. TDC to BDC
2. BDC to TDC
3. Midway to TDC
4. BDC to midway

✅ Correct Answer: 2

When the piston is accelerated, the piston effort is given by which of the following the equation?

1. F(L) – F(I)
2. F(L) + F(I)
3. F(L) ± F(I)
4. F(L) – F(I) + R(f)

✅ Correct Answer: 2

In the presence of frictional resistance, the expression for piston effort is _____

1. F(L) – F(I)
2. F(L) + F(I)
3. F(L) ± F(I) – R(f)
4. F(L) – F(I) + R(f)

✅ Correct Answer: 3

Crank effort is the product of crank pin radius and _______

1. Thrust on sides
2. Crankpin effort
3. Force acting along connecting rod
4. Piston effort

✅ Correct Answer: 2

In a horizontal engine, the weight of the reciprocating parts also add/subtract to the piston effort.

1. True
2. False
3. all of the above
4. None of the mentioned

✅ Correct Answer: 2

For the given data of an Internal combustion engine : Mass of parts = 180 kg bore = 175 mm, length of stroke = 200 mm, engine speed = 500 r.p.m., length of connecting rod = 400 mm and crank angle = 60° from T.D.C, find the inertia force.

1. 17.56 N
2. 19.2 N
3. 18.53 N
4. 18.00 N

✅ Correct Answer: 3

The crank-pin circle radius of a horizontal engine is 300 mm. The mass of the reciprocating parts is 250 kg. When the crank has travelled 30° from T.D.C., the difference between the driving and the back pressures is 0.45 N/mm2. The connecting rod length between centres is 1.2 m and the cylinder bore is 0.5 m. If the engine runs at 250 r.p.m. and if the effect of piston rod diameter is neglected, calculate the net load on piston.

1. 88000 N
2. 90560 N
3. 78036 N
4. 88357 N

✅ Correct Answer: 4

From the data given: crank-pin circle radius = 300mm mass of the reciprocating parts = 250kg difference between the driving and the back pressures is 0.45 N/mm2 The connecting rod length between centres is 1.2 m and the cylinder bore is 0.5 m. engine runs at 250 r.p.m & 30° from T.D.C. Find the piston effort.

1. 32.4 kN
2. 35.2 kN
3. 37.3 kN
4. 40.2 N

✅ Correct Answer: 3

What is the effect of partial balancing of the reciprocating parts?

1. Unbalanced primary force
2. Unbalanced primary force
3. Balanced primary force
4. Balanced secondary force

✅ Correct Answer: 1

Due to partial balancing there is unbalanced force only along the line of stroke.

1. True
2. False
3. all of the above
4. None of the mentioned

✅ Correct Answer: 2

The effect of an unbalanced primary force along the line of stroke is to produce ____

1. Swaying couple
2. Constant tractive force
3. Piston effort
4. Crank effort

✅ Correct Answer: 1