MCQOPTIONS

Explore topic-wise MCQs in Physics.

This section includes 17 Mcqs, each offering curated multiple-choice questions to sharpen your Physics knowledge and support exam preparation. Choose a topic below to get started.

1.	The draught produced by a steam jet issuing from a nozzle placed in the chimney is called
A.	chimney draught
B.	forced steam jet draught
C.	none of these
D.	induced steam jet draught
Answer» E.

2.	The relative efficiency is defined as the
A.	ratio of brake power to the indicated power
B.	ratio of thermal efficiency to Rankine efficiency
C.	product of thermal efficiency and Rankine efficiency
D.	ratio of heat equivalent to indicated power to the energy supplied in steam
Answer» C. product of thermal efficiency and Rankine efficiency

3.	The actual power supplied by the engine crankshaft is called
A.	brake power
B.	none of these
C.	indicated power
D.	frictional power
Answer» B. none of these

4.	A device in which some portion of waste heat of flue gases is recovered to heat the air before it passes to the furnace for combustion purpose, is knwon as
A.	superheater
B.	air preheater
C.	economiser
D.	injector
Answer» C. economiser

5.	The chimney draught varies with
A.	all of these
B.	climatic conditions
C.	temperature of furnace gases
D.	height of chimney
Answer» B. climatic conditions

6.	Which of the following is a water tube boiler ?
A.	Cochran boiler
B.	Locomotive boiler
C.	Babcock and Wilcox boiler
D.	Lancashire boiler
Answer» D. Lancashire boiler

7.	The missing quantity per stroke is equal to
A.	cylinder feed - indicated mass of steam
B.	cylinder feed + indicated mass of steam
C.	mass of cushion steam + indicated mass of steam
D.	mass of cushion steam + cylinder feed
Answer» B. cylinder feed + indicated mass of steam

8.	A compound steam engine in which piston rods of high pressure and low pressure cylinders � are attached to two different cranks set at 180° to each other, is called
A.	None of these
B.	Tandem type compound engine
C.	Woolf type compound engine
D.	receiver type compound engine
Answer» D. receiver type compound engine

9.	Lancashire boiler is
A.	internally fired boiler
B.	stationary fire tube boiler
C.	horizontal boiler
D.	all of these
Answer» E.

10.	The equivalent evaporation is defined as
A.	the amount of water evaporated or steam produced in kg per kg of fuel burnt
B.	the ratio of heat actually used in producing the steam to the heat liberated in the furnace
C.	the evaporation of 15.653 kg of water per hour from and at 100° C
D.	the amount of water evaporated from and at 100° C into dry and saturated steam
Answer» E.

11.	Expansion ratio is the ratio of
A.	swept volume to the volume at cut-off
B.	volume at cut-off to the swept volume
C.	swept volume to the clearance volume
D.	clearance volume to the swept volume
Answer» B. volume at cut-off to the swept volume

12.	The high pressure and low pressure cylinders in a Tandem type compound engine are regarded as having cranks
A.	0° to each other
B.	180° to each other
C.	none of these
D.	90° to each other
Answer» B. 180° to each other

13.	The fire tubes in a Cochran boiler usually have __________ diameter.
A.	6.25 mm
B.	62.5 mm
C.	92.5 mm
D.	72.5 mm
Answer» C. 92.5 mm

14.	The selection of type and size of a steam boiler depends upon
A.	all of the above
B.	the fuel and water available
C.	the power required and working pressure
D.	the geographical position of the power house
Answer» B. the fuel and water available

15.	The artificial draught is produced by
A.	centrifugal fan
B.	steam jet
C.	both steam jet and centrifugal fan
D.	chimney
Answer» D. chimney

16.	Lancashire boiler is used where working pressure and power required are
A.	low
B.	high
C.	moderate
D.	none of these
Answer» D. none of these

17.	The momentum correction factor (?) for the viscous flow through a circular pipe is
A.	1.5
B.	1.33
C.	1.25
D.	2
Answer» C. 1.25