Explore topic-wise MCQs in Engineering.

This section includes 4791 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering knowledge and support exam preparation. Choose a topic below to get started.

4701.

The purpose of a riser is to

A. deliver molten metal into the mould cavity
B. act as a reservoir for the molten metal
C. feed the molten metal to the casting in order to compensate for the shrinkage
D. deliver the molten metal from pouring basin to gate
Answer» D. deliver the molten metal from pouring basin to gate
4702.

Metal patterns are used for

A. small castings
B. large castings
C. complicated castings
D. large scale production of castings
Answer» E.
4703.

The instrument which has all the features of try-square, bevel protractor, rule and scriber, is

A. outside micrometer
B. inside micrometer
C. depth gauge micrometer
D. combination set
Answer» E.
4704.

When a hole or cavity to be cored is not in line with the parting surface, then a __________ is used.

A. horizontal core
B. vertical core
C. drop core
D. balanced core
Answer» D. balanced core
4705.

The bloom is smaller than a billet.

A. True
B. False
Answer» C.
4706.

In average work, the tolerance produced by investment casting method is

A. 0.05 mm
B. +0.2 mm
C. +05 mm
D. +1 mm
Answer» B. +0.2 mm
4707.

The low pressure acetylene is produced at the welding site by the chemical reaction between water and calcium carbonate.

A. Correct
B. Incorrect
Answer» C.
4708.

The ferrous metals require more machining allowance than non-ferrous metals.

A. True
B. False
Answer» B. False
4709.

In a four high rolling mill, there are four rolls out of which

A. one is working roll and three are backing up rolls
B. two are working rolls and two are backing up rolls
C. three are working rolls and one is backing up roll
D. all of the four are working rolls
Answer» C. three are working rolls and one is backing up roll
4710.

When a pattern is made in three parts, the bottom part is known as a cope.

A. True
B. False
Answer» C.
4711.

In __________ welding, the weld may be made either from left to right or from right to left.

A. fore-hand
B. back-hand
C. vertical
Answer» D.
4712.

The algebraic difference between the minimum limit and the basic size is called

A. actual deviation
B. upper deviation
C. lower deviation
D. fundamental deviation
Answer» D. fundamental deviation
4713.

Blanking and piercing operations can be performed simultaneously in a

A. simple die
B. progressive die
C. compound die
D. combination die
Answer» D. combination die
4714.

In welding copper alloys with TIG arc welding

A. direct current with straight polarity is used
B. direct current with reversed polarity is used
C. alternating current is used
D. any one of these
Answer» B. direct current with reversed polarity is used
4715.

The temperature of oxy-hydrogen flame is __________ oxy-acetylene flame.

A. same as
B. less than
C. more than
Answer» C. more than
4716.

In a hot chamber die casting machine

A. ferrous alloys with low melting temperature are casted
B. ferrous alloys with high melting temperature are casted
C. non-ferrous alloys with low melting temperature are casted
D. non-ferrous alloys with high melting temperature are casted
Answer» D. non-ferrous alloys with high melting temperature are casted
4717.

The electrodes used in spot welding have a tip of

A. stainless steel
B. aluminium
C. copper
D. brass
Answer» D. brass
4718.

A pattern maker's shrinkage rule considers

A. all pattern allowances
B. only shrinkage allowance
C. all materials to be cast
D. all materials of the pattern
Answer» C. all materials to be cast
4719.

The tolerance produced by shell moulding process of casting is

A. +0.05 mm
B. 0.2 mm
C. +0.5 mm
D. 1 mm
Answer» C. +0.5 mm
4720.

In submerged arc welding, an arc is produced between a

A. carbon electrode and the work
B. metal electrode and the work
C. bare metal electrode and the work
D. two tungsten electrodes and the work
Answer» D. two tungsten electrodes and the work
4721.

In shielded arc welding

A. large electrode is used
B. welding rod coated with slag is used
C. welding rod coated with fluxing material is used
D. none of the above
Answer» D. none of the above
4722.

In a die casting method, the molten metal is forced into mould under high pressure.

A. Correct
B. Incorrect
Answer» B. Incorrect
4723.

In a centrifugal casting method, the impurities are collected in the centre of the casting.

A. Yes
B. No
Answer» B. No
4724.

Which of the following methods can be used for manufacturing 2 metre long seamless metallic tubes?

A. Drawing
B. Extrusion
C. Rolling
D. Extrusion and rolling
Answer» E.
4725.

A saw which cuts wood during the return stroke of the saw is known as

A. push saw
B. pull saw or draw saw
Answer» C.
4726.

The chisel used for cutting key ways is

A. flat chisel
B. cape chisel
C. round nose chisel
D. diamond pointed chisel
Answer» C. round nose chisel
4727.

The temperature at which the new grains are formed in the metal is called

A. lower critical temperature
B. upper critical temperature
C. eutectic temperature
D. recrystallisation temperature
Answer» E.
4728.

Thread rolling is restricted to

A. ferrous materials
B. ductile materials
C. hard materials
D. none of these
Answer» C. hard materials
4729.

The valve overlap in four stroke petrol engines is approximately

A. 30
B. 60
C. 90
D. 120
Answer» B. 60
4730.

In sheet metal blanking, shear is provided on punches and dies so that

A. press load is reduced
B. good cut edge is obtained
C. warping of sheet is minimised
D. cut blanks are straight
Answer» B. good cut edge is obtained
4731.

In arc welding, the electric arc is produced between the work and the electrode by

A. voltage
B. flow of current
C. contact resistance
D. all of these
Answer» D. all of these
4732.

The petrol engines are also known as

A. spark ignition (S.I.) engines
B. compression ignition (C.I.) engines
C. steam engines
D. none of these
Answer» B. compression ignition (C.I.) engines
4733.

In a centrifugal casting method

A. core is made of sand
B. core is made of ferrous metal
C. core is made of non-ferrous metal
D. no core is used
Answer» E.
4734.

Which of the following indicates a multigrade oil ?

A. SAE 30
B. API SF
C. SAE 20 W-50
D. API 50
Answer» D. API 50
4735.

The natural gas is compressed in a CNG cylinder at a pressure of

A. 200 bar
B. 220 bar
C. 250 bar
D. 300 bar
Answer» B. 220 bar
4736.

The cetane rating of Diesel fuel is in the order of

A. 25
B. 45
C. 70
D. 90
Answer» C. 70
4737.

The coefficient of friction for the clutch facing is approximately

A. 0.1
B. 0.4
C. 0.8
D. 1.2
Answer» C. 0.8
4738.

The component that connects the steering rack to the knuckles is

A. tie-rod
B. sector gear
C. pivot
D. spline
Answer» B. sector gear
4739.

The most commonly used supplementary restraint system (SRS) component is

A. seat belt
B. brake
C. airbag
D. steering
Answer» D. steering
4740.

The air gap between the central electrode and ground (or side) electrode of a spark plug is around

A. 0.2 mm
B. 0.5 mm
C. 1 mm
D. 1.5 mm
Answer» D. 1.5 mm
4741.

The cetane number of a Diesel fuel is a measure of

A. volatility
B. viscosity
C. ignition quality
D. delay peirod
Answer» E.
4742.

The aluminium alloy is used in cylinder blocks because

A. it is lighter and have good heat dissipation characteristics
B. material cost is low
C. it does not require any cylinder liners
D. the piston is also made of aluminium alloy
Answer» B. material cost is low
4743.

In a fuel injection system, the electronic control module (ECM) calculates the optimum fuel-injection volume for the engine condition based on the data received from the sensors, and injects this volume of fuel into the intake manifold at the optimum timing.

A. Correct
B. Incorrect
Answer» B. Incorrect
4744.

The tilting of the front wheels away from the vertical, when viewed from the front of the car, is called

A. camber
B. caster
C. toe-in
D. toe-out
Answer» B. caster
4745.

The main function of the tread pattern on tyre is that

A. the tread grooves pass air between the tyre and road surface, thereby preventing tyre from overheating
B. the crests between the tread grooves absorb road noise
C. in wet conditions, the tread grooves expel water that is drawn between the tyre and road surface
D. the tread pattern protects the tyre's inner carcass from small stones and pieces of glass
Answer» D. the tread pattern protects the tyre's inner carcass from small stones and pieces of glass
4746.

The compression ratio in petrol engine is kept less than in Diesel engine because

A. it makes petrol engines lighter
B. higher or equivalent compression ratio in petrol engines is not possible due to pre-ignition
C. less compression ratio gives better performance
D. it is just customary to have less compression ratio in petrol engines
Answer» C. less compression ratio gives better performance
4747.

The information provided by the oxygen (O2) sensor to the feedback control system is about the

A. air-fuel ratio
B. air temperature
C. air flow speed
D. exhaust gas volume
Answer» B. air temperature
4748.

The diagram which shows the correct crank positions corresponding to the opening and closing of the valves, is known as

A. indicator diagram
B. axial force diagram
C. valve timing diagram
D. none of these
Answer» D. none of these
4749.

In automobiles G.V.W. refers to

A. gross vehicle width
B. gross vehicle weight
C. gross vehicle wheel base
D. gross vehicle wheel track
Answer» C. gross vehicle wheel base
4750.

The firing order for an in-line four cylinder I.C. engine is

A. 1-2-3-4
B. 1-3-4-2
C. 1-2-4-3
D. 1-3-2-4
Answer» C. 1-2-4-3